Many topics covering charging, range, software, servicing and the things MG4 owners often discover only after buying the car. Every note links back to where the information came from. Owner reports, not MG statements and not advice.
What owners actually hit, from public forums, published reviews and recall notices. Every entry was checked against the source it cites.
Some notes do not name particular variants in their source, so they are shown under every car filter rather than quietly hidden from four of them.
If the head unit freezes, park the car and hold the physical Home button under the screen for 10 seconds or more, then release, and the infotainment reboots.
May-Jul 2023Generalall 2023 MG4
Every Australian MG4 variant ships without an AM tuner, so check which band your local ABC station uses before driving in fire-season country.
May 2025AUall Australian 2023 MG4 variants
MG's own programming and configuration manual carries a procedure called window regulator initialisation. It applies to windows with the one-touch-up and anti-pinch features, and it is used to restore those functions after they stop working. The manual gives two situations that cause the loss: the 12 volt power being cut while a window is part way through moving, and replacement of the window regulator itself. The documented procedure is to fully open the window, then lift the switch briefly several times in succession to raise the glass to the top, and then hold the switch up for about five seconds. The only stated condition is that the car is powered on.
Jul 2023GeneralDocumented for the MG4 generally; applies to any window with one-touch and anti-pinch, so all variants are listed
MG's programming and configuration manual sets out the around view monitor calibration, which is what produces the stitched overhead image. It requires a specific special tool, a calibration cloth laid out around the car, and a calibration station of a checked size. The car is driven into the station and the cloth is positioned to defined tolerances: the front axis marked on the cloth aligned with the centre points of the two front wheels, the left inner edge parallel to the line through the centres of the left front and left rear wheels, and equal distances from the left and right inner edges to the wheels on each side. Calibration is then run from the car's own screen and takes about five to ten seconds to report a result. The manual says calibration is required whenever the control module or a camera is replaced, or a camera moves abnormally.
Jul 2023GeneralApplies to cars fitted with the 360 degree around view monitor, which the base Excite 51 does not have
MG publishes nothing resembling release notes, so the community maintains its own list of what each release actually changed. Across the releases owners have been able to observe: a basic route planner appeared in the built-in navigation; the climate control's temperature midpoint and its poor heating performance were corrected; the screen freezing was addressed; Bluetooth pairing that kept dropping was fixed, as was phone projection sometimes refusing to connect; and a message telling you to plug the car in - which appeared even while driving on a full battery - was removed. The most recent releases have added little an owner would notice beyond open-source licence text and a fix for an intermittent black screen. On one branch the plug-in nag even came back after being removed.
Mar 2026GeneralObservable changes across head-unit releases, 2023 to 2026 all variants
The warranty exceptions table gives the screen, the connected features and the driver assistance systems their own shorter term: 36 months or 45,000 miles, whichever comes first. That is a much smaller window than the headline warranty and it covers precisely the parts of this car owners complain about most - screen freezes and black-outs, a failing DAB radio module, cameras, and the assistance systems. If your car has an intermittent screen, radio or driver-aid fault, get it on a dealer job card in writing well before the three year point, because a fault first reported afterwards falls outside this line even if the rest of the car is still covered.
Oct 2021UK/EUComponent-specific warranty term for infotainment and ADAS, UK warranty statement. all variants
MG's infotainment bulletins are split by head unit rather than by model year or trim, and the manufacturer gives a simple way to tell them apart: iSMART Full shows an online weather report on the home screen, and iSMART Lite does not. This is not cosmetic - the two run entirely separate software lines with different version numbering and different feature lists, and MG warns dealers in capitals that the Lite software package must not be loaded onto a Full head unit. So before you read anything about an infotainment update, or ask a dealer for one, establish which head unit your car has, because a change list written for one is not a promise for the other, and the wrong package on the wrong unit is a real risk.
Sep 2023GeneralStated in MG's European head unit bulletins; the Full/Lite split itself is a car characteristic, the version numbering is European. all variants
Bulletin SI-TB2023081101 lists what the August 2023 iSMART Full head unit release actually fixed, and it reads like a list of owner complaints. The MG Pilot driver assistance buttons will no longer switch on by themselves when the screen backlight changes; FM radio will no longer jump to DAB by itself on a backlight change; the 360 degree camera will stay on screen in front view when you shift out of reverse into drive instead of dropping away; the climate interface is redesigned; the climate menu opens automatically at start-up if the air conditioning was left on; and the battery and charging screen is improved. The significance is the backlight link - MG confirms that the car changing settings on its own was a genuine software fault triggered by the day/night display transition, not owners imagining it. The update is loaded by a dealer from a USB stick in the left-hand port under the screen.
Aug 2023UK/EUEuropean iSMART Full release; the fix list is manufacturer-stated, the version numbering is not applicable to Australian cars. all variants
Bulletin SI-TB2023092701 covers the September 2023 release for the iSMART Lite head unit and lists three changes: the exterior temperature reading is shown on the screen again after an earlier version had dropped it, the climate interface is redesigned, and a shortcut to Power Off is added to the drop-down menu. That last one is where the car's much-discussed 'off button' actually came from - it is a software-added shortcut, not something every car has always had. If your outside temperature display disappeared, this is a known regression with a documented fix rather than a fault to be chased. MG also warns that the screen goes black for a short time partway through the update and must not be touched, which is worth knowing if you are watching it being done.
Sep 2023UK/EUEuropean iSMART Lite release; applies only to cars with the Lite head unit. all variants
MG's infotainment component layout lists a Digital Audio Broadcasting module as a discrete box in its own right, separate from the entertainment mainframe - the head unit behind the glovebox - and separate again from the aerial amplifier and aerial coils. That gives the widely reported pattern of a radio that cuts out or locks up while the rest of the system carries on working a specific hardware home, and it means the DAB module can be replaced on its own. Worth quoting if a dealer starts talking about replacing the entire infotainment system for a radio fault.
2023GeneralFirst-generation MG4 infotainment component layout; UK/EU document, digital radio fitment varies by market. all variants
For weak reception or a station search that finds nothing, MG's first instruction is to move the car away from magnetic fields, underground car parks and tunnels and try again - a reminder that a dealer will legitimately begin by trying to reproduce the fault somewhere with clean signal, and that a workshop deep in a building is the worst place to judge it. After that, MG's expected causes are the head unit, then a separate antenna amplifier, then the antenna coil, each replaceable on its own. So a car with poor FM or DAB reception is not automatically a head unit job: there are two smaller aerial parts in the chain, and they are what MG checks before condemning the expensive item.
2022GeneralUK/EU service volume; broadcast bands and tuner hardware differ by market, so confirm which tuner your car has. all variants
MG's diagnosis for "the other side cannot hear you" on a hands-free call begins by checking whether the head unit is set to mute, then the microphone, then the head unit, then the phone. The mute step is counter-intuitive: most people assume mute only silences what comes out of the speakers, but on this system it is MG's first suspect for outgoing call audio. The second useful fact is that the cabin microphone is its own replaceable item, so a car that is fine on music and radio but always unintelligible on calls is a small part rather than a new head unit. The mirror-image complaint, where neither side can hear the other, sends MG to the phone first, then the speakers, then the head unit - so start by testing with a second phone.
2022GeneralUK/EU service volume; describes system behaviour rather than a regional process. all variants
MG's fault list for "rear view camera not display" includes, alongside the camera and its own wiring, the circuits and connectors carrying the reverse lamp signal. In other words the car uses the reversing lamp signal to tell the head unit to switch to the camera view, so a fault in that circuit leaves you with a working camera, a working screen, and no picture when you select reverse. That is worth quoting at a dealer before agreeing to a new camera or a new head unit, and it is a specific thing to check after towbar wiring, reversing light work or an aftermarket camera or dashcam installation, because those are exactly the jobs that disturb that circuit.
May 2022GeneralMG's listed causes for a blank reversing camera view; UK/EU document, wiring architecture not market-specific. all variants
MG approaches the two instrument pack symptoms from opposite ends. For a completely blank cluster with all the warning lamps off, the order is visible damage, then the instrument pack fuse, then its wiring, then a software reflash, and only then a replacement cluster - so a dead driver's display can be nothing more than a blown fuse. For a speedometer reading incorrectly, the very first step is to reflash the cluster software, then check the wiring back to the gateway and the stability control module, then the cluster, then the gateway itself. So a speedo that reads oddly is treated by the manufacturer as a software or data problem before it is a hardware one, which is a fair thing to ask a dealer to try before you are quoted for parts.
May 2022GeneralMG's diagnostic order for a dead or misreading instrument cluster; UK/EU document, not market-specific. all variants
MG's own procedure puts the update on a USB stick - USB 2.0 or better, 64 GB, formatted FAT32, nothing else on it, ejected safely rather than pulled out - into the front left port, and then flashes two things one after the other: the main application processor first, then the infotainment controller. Two different head-unit generations exist and each has its own menu route in. The same USB route is also used to reprogram the telematics module. The practical upshot for owners is the bit nobody mentions: if the second stage is skipped or interrupted, the screen can report a new version number while parts of the system are still running old code, which is exactly the sort of half-updated behaviour owners have described. When an update is done, ask for confirmation that both stages completed.
Jul 2023UK/EUUK/EU procedure and software lines; the two-stage structure is a property of the hardware. all variants
UK owners of early MG4 XPOWERs report the radio and Bluetooth stack occasionally freezing with no sound, and Bluetooth not always auto-connecting; holding HOME until the screen turns off resets it.
Sep-Dec 2024UK/EU2023 MG4 incl. XPOWER on early software; reported in UK ownership threads all variants
The head unit sorts USB music into one flat A-Z list by the ID3 Title tag, so to keep albums in running order rename your files as Album-TrackNo-Title and clear the Title field from the metadata.
Mar-Apr 2025AU+UKall 2023 MG4
If the centre screen randomly switches between displays or goes black and unresponsive, selecting a DAB radio station often settles it, and a factory reset from settings gives temporary relief.
Apr-Jun 2023UK/EU2023 MG4 (originally reported on Trophy, the UK equivalent of Essence 64)
If your screen goes blank, tell the dealer it is safety critical because you lose Autohold and more: the MG4 puts Autohold, drive and regen modes and most configuration behind the touchscreen with almost no physical fallback.
Jun 2026UK/EUMG4 with the blank-screen fault; this thread is UK Long Range owners all variants
On UK Trophy-spec cars the multi-tap password 200519 opens a hidden engineering/PDI menu on the infotainment; SE owners report the menu simply never appears, and no SE method has been published.
Jul-Dec 2023UK/EUUK Trophy/Luxury trims; unverified on Australian Essence 64 / Long Range 77 / XPOWER
Australian owners who could not get a phone to pair found the fix was to change the car's Bluetooth device name away from the default, then disable and re-enable Bluetooth on the car. More than one owner reported this working after other attempts had failed. It is a two-minute thing to try before booking the car in or concluding the phone is at fault, and it costs nothing.
Sep 2023AUReported on Australian cars; applies across the range all variants
The MG4's screen takes a while to come up, long enough that Australian owners comparing against other electric cars comment on it. It matters practically because several settings, including lane keep assist, cannot be changed reliably until the car is in Ready and the screens have finished booting. Rushing to reverse off a driveway before the system is up is how people end up with the toggle appearing to work and then not sticking. Give it a moment.
Aug 2023AUAustralian cars; applies across the range all variants
One design decision that consistently draws praise: the MG4 retains real physical buttons on the steering wheel rather than the haptic touch panels several rivals moved to. Owners coming from cars with touch-sensitive controls describe it as a meaningful daily improvement, because a physical button can be found and operated without looking away from the road. It is worth weighing against the car's genuine software shortcomings, which get far more attention.
Jul 2022GeneralApplies across the MG4 range all variants
Owners chasing a centre screen that freezes or goes black have identified several repeatable triggers: connecting an Android phone by USB cable, sustained hot weather, engaging reverse and invoking the camera, and software updates. The most instructive case was an owner whose freezing turned out to be an aftermarket rear-view camera installed with two cables left unconnected. If your screen started misbehaving after any accessory was fitted, suspect the accessory before the car.
Jul - Sep 2025GeneralReported on 2022-2025 cars across markets; variant not identified as a factor all variants
Early MG4 infotainment drew consistent criticism for lag and slow response, and while software updates have improved it, the underlying hardware has not changed. Because Australian cars have no over-the-air updating, an older car that has not been back to a dealer will still behave the way early reviews described. Spend time on the screen during a test drive rather than only driving the car, since this is the part of the ownership experience people complain about most and it is the hardest to assess from a specification sheet.
Mar 2023GeneralEarly cars and early software; applies across the range all variants
Reassuring to know: the infotainment screen is a separate system from the parts of the car that make it drive and stop. If the screen freezes or misbehaves, you can reboot it by holding the home button for about ten seconds and the car keeps driving normally the whole time. The driving, braking and safety systems run on their own control modules and do not depend on the centre screen being awake. So a frozen screen is an annoyance to reset, not a reason to stop or to fear the car will lose power.
2026GeneralApplies across the range; the infotainment is separate from the driving control modules all variants
Owners who have done it themselves report the actual update taking five to ten minutes, with no requirement to have the car plugged in or the battery full - one did it at around 35 percent charge with no trouble. What takes the extra time is putting your settings back: several official procedures begin with a factory reset of the screen, so radio favourites, the dark theme and the rest of your preferences are gone afterwards. Budget a few minutes at the end to set the car up again rather than assuming something has broken.
Feb 2026GeneralHead-unit software update, time required and settings lost all variants
One owner whose dealer updated the car during a lane-keep visit lost several things at once: he could no longer add apps to the screen, the quick settings vanished while Android Auto was running, the battery heating toggle was buried in a sub-menu, and the energy screen stopped showing kilowatt-hours consumed. Separately, from a certain release onwards the hidden Android settings pages are still visible but their buttons are dead, so anything you want to add to the head unit has to be done before you accept the update. An earlier release had already removed the ability to change the tyre pressure units. Updates on this car are not automatically improvements.
Jun 2026GeneralFeature regressions after head-unit updates all variants
Owners report the display dropping to black when the reversing or indicator camera view hands back to whatever was on screen before, most often when phone projection was showing. One owner filmed it happening as the surround-view display closed while he turned and accelerated. A patch aimed specifically at an intermittent black screen was released in April 2026, and the owner who took it at a service found the fault became less frequent but did not stop. Briefly selecting reverse, or a long press on the home button, generally brings the display back without stopping the car.
Jun 2026GeneralBlack screen when the camera overlay closes, before and after the 2026 patch all variants
MG's diagnosis for a rear view camera that does not display follows a specific chain: the camera and its condition, the camera's own wiring back to the entertainment head unit, then the reverse lamp signal circuit that tells the system reverse has been selected, and only at the end a reflash of the body control module. Two useful conclusions for an owner. If the screen switches to the reversing view and draws its guide lines but shows no picture, the system already knows you are in reverse, so the fault sits in the camera or its video wiring rather than in the reverse signal - that narrows an argument with a dealer considerably. And because the camera wires straight into the head unit, anyone splicing into the reverse feed or the camera lines to power a dashcam, an aftermarket camera or a towbar module is working inside the circuit MG will be diagnosing, so mention any such installation up front.
2023GeneralRear view camera diagnosis from MG's UK repair information; describes the car's wiring rather than a market feature. all variants
Settings > System shows the head unit's software string, such as SW168-29958-1300R30, and the trailing R-number is the release level owners compare.
Aug 2024UK/EUall 2023 MG4 (engineer's menu: single forum report, use at own risk)
Australian guidance from May 2025 says the MG 4's operating and infotainment systems come on as soon as the car is unlocked, and you can shut them down from the driver's seat via the Safety menu, then Vehicle Power Off.
May 2025AUall 2023 MG4, Australian market
An Australian Excite owner reports the rear door cards carry grilles but no speakers fitted, so all the sound comes from the front pair. He read on the MG EVs forum that it is apparently possible to wire the missing speakers in and has adding rears on his list of things to do - but he had not done it, and nobody on the thread confirmed the rear-door wiring is already in place, so budget for running it. If your rear sound seems dead, it is the specification, not a fault to book in.
date not establishedAUExcite trim cars; Essence has the fuller speaker set
The head unit's processing includes a virtual subwoofer setting, and which way you want it depends on what is in the doors. On the standard speakers owners generally prefer it on, since it adds body the small drivers cannot produce. After fitting better mid-bass drivers it works against them, and owners who upgraded report switching it off gives a cleaner and better balanced result. It costs nothing to try both.
Mar 2023UK/EUReported on a Trophy with the fuller audio processing; lower trims may not expose the same settings all variants
Worth knowing before anyone starts dismantling the dashboard: the MG4's head unit is mounted behind the glovebox, while the screen on the dash is effectively the display. Owners doing audio work reach the unit from the passenger side. It also means the unit is driving the standard speakers directly with no separate amplifier in most cars, which is why aftermarket speakers chosen to be easy to drive work without adding one.
Mar 2023UK/EUReported on a UK Trophy; assumed common across the range but not confirmed per variant all variants
The MG4 has no 3.5 mm auxiliary input. If you have a source that is not a phone, such as an older media player or a device that only outputs analogue, there is no direct way to feed it in. Your options are Bluetooth, USB, or Apple CarPlay and Android Auto. Owners weighing up sound quality also note there is no published information about the head unit's own digital-to-analogue conversion, so the quality ceiling of the standard system is not something you can look up before buying.
2026AUReported by Australian owners; assumed common across the range but not confirmed per variant all variants
A workaround owners use when the centre screen has frozen but the car is otherwise fine: select reverse for a moment, which invokes the reversing camera and forces the display to redraw. Reconnecting Apple CarPlay or Android Auto has the same effect for some owners. Neither addresses the cause, but both are quicker than a full restart and can get you moving. Only do the reverse trick where it is safe to select reverse.
Jul 2025GeneralReported on 2022-2025 cars; variant not identified as a factor all variants
On cars with the 360 camera system, the view that appears when you indicate closes automatically once you are above 15 km/h. Owners widely assume the threshold is 20, which is why it seems to cut out earlier than expected when pulling out. Two other stock behaviours are worth knowing: the camera takes over the whole screen with no way back until it clears, and you cannot see two camera views at once, with the view resetting if you change gear while parking.
May 2026GeneralCars fitted with the 360 camera system, pre-2026 facelift; the Excite trims do not have it
An owner who upgraded to a component set found the bass was very weak streaming over Bluetooth, and no amount of EQ brought it back. Playing the same tracks from the same phone through CarPlay was markedly better. It suggests the head unit's Bluetooth audio path is the weak link rather than the speakers, so if you care about bass, feed music over wired projection or USB.
Aug 2024GeneralBluetooth streaming gives weaker bass than CarPlay/USB on the same phone all variants
One Australian Excite owner updated the head unit himself from the version the car was built with to a later Australian release, and found the reversing camera image gone: the parking guidelines still drew on the screen but there was no picture behind them. Rolling the head unit back to the original factory version restored the camera straight away. Nobody else reported that exact combination, so it may be specific to that car and that file rather than a fault in the newer release generally, but it is a clear example of a self-applied update breaking something that worked.
Jun 2026AUAustralian 2023 Excite, owner-applied head-unit update
Plug the phone into the front USB-A port in the centre console tray for CarPlay or Android Auto; the USB-C port beside it supplies power only and will never start projection.
May 2025AUall 2023 MG4, Australian market
On the Australian MG4 (MY24 long-term test) wired CarPlay runs from the USB-A port only - USB-C will not do CarPlay, there is no wireless CarPlay, and USB-C iPhones need an adapter.
Jun 2024AU+UKAustralian MG4 2023–2024; USB behaviour also reported in UK cars all variants
Many right-hand-drive MG4 owners report CarPlay drawing in left-hand-drive layout with the sidebar on the passenger side, and there is no user setting for it - CarPlay follows what the head unit declares.
Wiki, 2022-2026AU+UKright-hand-drive MG4 (Australia, UK) all variants
Wireless CarPlay on the MG4 is not a built-in feature. Owners who have it are using a third-party adapter plugged into the USB port, which then presents itself to the head unit. That is why wireless CarPlay behaviour varies so much between owners: you are comparing different dongles, not different cars. Reported dropouts of around thirty seconds tend to cluster on motorways and in areas of weak mobile signal, which points at the phone's connection rather than the car. Owners report both expensive and very cheap adapters working well, and the same model working for one person and not another.
Nov 2025GeneralReported across MG4 trims; variant not identified as a factor all variants
Owners cycling through adapters looking for one that works are usually solving the wrong problem. The setting that matters is the dongle's startup delay: set it to about 30 seconds so the adapter waits for the car's infotainment to finish booting before it tries to connect. Owners describe this as the difference between intermittent-or-never and reliable. You set it through the adapter's own web interface, reached by connecting to the network it broadcasts. Several different adapters were reported working once this was set.
Apr - Nov 2024GeneralReported across MG4 trims; the fix is a property of the adapter rather than the car all variants
Australian owners report Apple CarPlay occasionally switching to a left-hand-drive screen layout, putting elements on the wrong side for a right-hand-drive car, and separately going to a black screen. Software updates improved stability but at least one owner still saw the layout flip afterwards. It is cosmetic rather than dangerous, and it generally clears on a reconnection or a restart of the head unit, which is done by holding the physical home button.
Jan 2024AUReported on Australian right-hand-drive cars; applies across the range all variants
Owners running Android Auto report two recurring annoyances. First, if you plug your phone in before the car has fully booted, Android Auto often will not start and you have to unplug and replug the cable once the car is up. Second, when a phone call comes in the screen can drop back to the MG's own panel and you then have to re-trigger Android Auto to get the map back. The practical habit is to let the car finish starting before connecting your phone, and to expect to re-launch after calls.
2024 - 2025GeneralReported across variants using Android Auto; not a wireless-only issue all variants
A common annoyance: you get in at night and Android Auto or CarPlay comes up in bright day colours instead of the dark night theme, even though everything is set correctly. The cause is that the car only tells the phone about a day/night change when it changes, not when the connection first starts, so at start-up it can be out of step. The quick fix owners use is to flick the headlights off and on, or open the car's Android Auto/CarPlay settings and switch the day/night setting over and back. Either nudges the car to resend the state and the dark theme kicks in.
2026GeneralReported across variants using Android Auto or CarPlay all variants
A persistent bar across the top of the screen, giving access to the climate and a few other controls without leaving phone projection, arrived in a mid-life release - and on the first release that had it, only the rear fog light button on the bar actually worked. Owners in several markets are still on releases without the bar at all and have to drop out of projection to change the temperature, which is the single change they most want. One owner went the other way and lost his quick settings during Android Auto when a dealer updated the car. It is worth checking what your own car does before assuming the feature does not exist.
Jun 2026GeneralAccess to climate controls during phone projection across software versions all variants
When wired CarPlay keeps dropping out, change the cable first: owners report short MFi-certified leads of 50 cm or a foot working reliably where 90 cm ones kept dropping out.
Nov 2022 - Apr 2024Generalall 2023 MG4 (wired CarPlay is the only factory option)
A setup detail that causes a lot of wasted troubleshooting: with a wireless CarPlay adapter, the phone should be paired by Bluetooth to the adapter and not to the car. If the phone is still paired to the car's own Bluetooth as well, the connection becomes unreliable. Owners also advise doing the initial adapter configuration with it plugged into a power-only USB source at home, away from the car, so you can reach its settings without the car interfering.
Apr - Nov 2024GeneralReported across MG4 trims; adapter behaviour rather than variant behaviour all variants
Early cars devoted a full-width band of the screen to the car's own status information while Apple CarPlay or Android Auto was running, which wasted a meaningful slice of a screen that is not enormous to begin with. A software update replaced it with a thin status bar, giving phone projection more room. The same update also made the touchscreen status bar persistent and addressed a delay when starting to drive.
Sep 2023AUAustralian variants on the September 2023 software or later all variants
The entry-level Australian car has a 10.25 inch touchscreen with wired Apple CarPlay, and the base safety equipment. If you are comparing trims, this is one of the practical differences that shows up daily rather than occasionally. It is also the reason wireless CarPlay questions on the MG4 always come back to third-party adapters: no MG4 trim shipped with wireless projection built in, and the base car is wired-only by specification rather than by omission.
Mar 2024AUAustralian Excite 51 as specified in 2024
A small annoyance owners have not found a way around: Google Maps on Android Auto in the MG4 renders in light mode regardless of the phone's own dark mode setting, which is unpleasant at night on a bright screen. It appears to be a projection behaviour rather than an MG setting, so there is nothing in the car's menus to change. Reducing overall screen brightness at night is the practical mitigation.
Dec 2024AUReported on an Australian car using Android Auto; applies across the range all variants
Before buying a new cable or a wireless adapter, push the plug in properly. An Australian owner resolved a persistent wired CarPlay connection problem simply by seating the USB connector firmly. The MG4's ports sit where they are awkward to see, and a plug that is nearly home will power the phone while failing to carry data reliably, which produces exactly the intermittent behaviour people blame on the car.
Sep 2023AUReported on an Australian car; applies across the range all variants
Binding your car to iSMART takes one step on Excite variants but two on Essence: both start with Settings then Bind Vehicle on the touchscreen, and Essence also needs a User-app login and a QR scan.
Apr 2025AUall 2023 MG4, Australian market; two-step flow is Essence 64 and above
Remote lock/unlock, climate pre-conditioning and app-initiated start on Australian-delivered MG4s all depend on a Vodafone 4G signal, so keep the physical key fob with you rather than relying on the app.
Apr 2025AUall 2023 MG4, Australian market
The warranty statement draws a line straight through the connected-car experience: MG says it is not responsible for the warranty or maintenance of the iSMART app or its software, while the iSMART hardware fitted to the car is covered if it fails through a manufacturing defect. It adds that third-party smart apps are not warranted by MG and that MG does not guarantee connectivity with all makes and models of phone. So an app that will not wake the car, drops out for days or shows nonsense is not a warranty item on its face - but the telematics unit behind it is, and that is the framing that gets a dealer to act. Ask for the in-car module to be tested and updated rather than reporting it as an app problem.
Oct 2021UK/EUWarranty position on the connected app versus the in-car telematics hardware; UK statement. all variants
The PDI manual has a dedicated step for registering the connected-car system. The technician opens the car's settings, switches on the wireless function, joins the dealership's wifi, then runs an activation sequence that separately activates the security certificate and activates the maps. That explains a pattern owners keep hitting: a car whose app never connected, or whose built-in navigation maps were never enabled, most often left the dealer with this step skipped rather than having a hardware fault. It is a short menu sequence on the car, so it is entirely reasonable to ask for it to be redone rather than accepting that your car is simply the unlucky one.
2022UK/EUUK dealer PDI step for iSMART, certificate and map activation - UK/EU process, may differ in Australia. all variants
MG's April 2024 bulletin describes the symptom exactly as owners see it: the SOS warning light appears on the instrument cluster sporadically and then goes out again on its own, with fault code B1526 stored in the telematics box. The documented fix is to load the newest telematics software, which the dealer downloads and installs from a USB stick, then restart the car and confirm the warning has gone; it is a 0.6 hour job claimed as a technical service bulletin. Just as usefully, MG tells dealers what to do when that does not work: the problem can be caused by hardware or wiring, and the dealer is then obliged to raise a technical support ticket with MG rather than send you away. So an intermittent SOS light is neither normal nor a dead end.
Apr 2024UK/EUMG Motor Europe bulletin; telematics software releases are market-specific, the fault code is not. all variants
The telematics box is the module behind the connected-car app, the emergency call function and the car's own GPS, and it cannot simply be swapped over. MG's replacement procedure has four stages: flash the module's main processor, flash its controller, configure it (which writes your VIN and sets which functions it runs), and finally a setup routine whose whole job is to exchange keys between the telematics box, the body control module and MG's back end. Until that exchange has happened the car and MG's servers do not trust one another, so app functions stay dead however good the hardware is. Worth knowing for two reasons: a donor module from a breaker is not a shortcut, and there is also a documented restart routine for the module, which is a cheaper thing to try before anyone condemns it for an app that will not connect.
Jul 2023GeneralAll first-generation MG4 fitted with the telematics module; UK/EU manual.
If you plan to preheat or precool the cabin off mains power, test it on the actual car rather than assuming it works, because early-build cars could not precondition while plugged in.
Jan 2023UK/EUearly-build (2022/Phase 1) MG4; may be improved by later dealer software all variants
If iSMART crashed on launch on your Android phone in July 2025, that was a fault in the Australian app build v2.2.1 rather than anything on the car, and the Australian v2.2.2 update around 10 July 2025 cleared it.
Jul 2025AUall MG4 variants, Australian market specifically (AU app build lags UK)
MG iSMART connectivity is complimentary for the first 12 months from a new MG's purchase date, and MG's current terms name no ongoing price, only that you are responsible for any service or licence charges MG may introduce.
Apr 2025AUall 2023 MG4, Australian market
MG iSMART remote commands such as lock, unlock and climate can fail with "remote control function failed please try again later (59)" while the app still reads car status normally, reported by UK and German owners of 2022-2025 MG4s.
Mar-Nov 2023UK/EU2022–2025 MG4 across markets; depends on the car's own cellular signal, not your phone's all variants
After a long park the car can drop into a deep-sleep state where iSmart remote climate, preheat and defrost stop responding while lock and unlock still work; unlocking and re-locking with the key fob wakes it up.
Jan 2026UK/EUMG4 2022–2025, all variants
UK owners report that seat pre-heat is reversed on right-hand-drive MG4s: set the driver's seat to pre-heat in the iSMART app or on a timer and the passenger seat warms instead.
2023-2024UK/EUUK Trophy trim reported; check equivalent Australian Essence 64 / Long Range 77
UK MG4 owners report the clock drifting, resetting, or announcing a date of "Jan 1st 2019" even with GPS sync switched on, and a wrong clock can block iSMART binding outright.
Oct 2022 - Jan 2026 (living wiki)UK/EUMG4 2022–2025, all variants
When iSMART says the status is unknown or a remote command fails, the usual cause is that the car has gone into a deep sleep to protect the 12V battery after roughly a day and a half of sitting untouched. The app cannot wake it from that state. What owners find works is going to the car and unlocking and relocking it with the key, then refreshing the app. If that does not restore it, MG's own support has pointed people at a telematics box reset done by an authorised workshop.
Sep 2025GeneralReported across MG4 trims; variant not identified as a factor all variants
Remote window closing, common on other cars via a long press of the key fob or through the phone app, is simply not a function the MG4 offers. Owners asking about it are consistently told the car cannot do it. Aftermarket modules advertised as adding the feature were reported as showing no functions available for the MG4, and experienced members warned that some are sold on the strength of a promise the seller does not deliver. If leaving the windows down matters to you, treat it as a limitation of the car rather than something to buy your way around.
Aug 2024GeneralReported across MG4 trims; variant not identified as a factor all variants
A recurring worry among prospective buyers is that the connected features will move behind a subscription, with a figure of around $50 a year circulating. As of the reports here, no charge has appeared: one owner confirmed being into a second year with no billing, and no paywall had been announced. The connected features covering remote locking, climate control and charge management are included across all trims and use the car's own cellular connection rather than your phone's.
Dec 2024AUAustralian market as of late 2024; applies across the range all variants
An owner who worked through every module on his 2022 car reported that the biggest single improvement was not the screen but the telematics unit: on a route where he used to lose mobile signal and the emergency call function two or three times, he now loses neither, and the phone app wakes the car reliably where before it was hopeless. Two other owners had the opposite experience immediately after a large update - the car lost its mobile connection entirely, then restored itself after three or four days with no intervention, apparently once the network side caught up. There is a setting for the car's online data connection worth checking if the app stops working after any update.
Feb 2026GeneralConnected-car module update; app wake-up, mobile signal and emergency call
The app is not a feature of the car so much as a service switched on country by country. Owners in Colombia and Chile report it has never worked for them - one waited over a year with no navigation service at all, another gets only a pairing failure when he scans the code. In Turkey the telematics units were physically replaced under a manufacturer campaign after a regulatory registration issue with the built-in SIM, and months later the app was still not live for most owners. Australian, UK and European cars have a working service with the usual quirks. It is worth knowing if you are ever offered an imported car or one from an unusual market.
Apr 2026GeneralConnected-car app availability by market of sale all variants
A long-term Australian MG4 owner notes the SAIC/MG iSMART app is restricted to one logged-in device at a time, which he calls "a bit annoying if two people use the car". He does not say what happens to the first device when the second signs in, and rather than sharing the app login he worked around it by building a Home Assistant dashboard both people could reach at once. Treat it as one owner's account of the restriction, not a documented MG policy.
date not establishedAUHouseholds where more than one person wants app control of the same car all variants
An Australian owner posted a screenshot of the iSMART app showing the date '19 Jan 2038' at the top, remarking that the battery voltage 'appears to be a bit high' and the tyre pressures 'a bit low'. No one in the thread diagnoses the date, and it is not discussed as a 32-bit rollover. Note that the same owner's follow-up post about the car's own pressure readout suggests his tyres genuinely were low ('think I need to get the tyre pump out'), so don't assume an odd app value is automatically wrong — cross-check it against the car's own screen either way.
date not establishedAUApp-side data display; the car's own readouts were normal all variants
An Australian owner found iSMART down — problems in Home Assistant, then no login from the Android app either — and traced it to a SAIC root domain, '||soimt.com^', that had been added to one of his Pi-hole blocklists. Nothing in the app pointed at the cause; he found it himself. If you run a network-wide ad or tracker blocker, check it for that domain before raising a support ticket. He does not say whether the app still worked over mobile data, so don't rely on that as the diagnostic test.
date not establishedAUHome networks running Pi-hole, AdGuard Home or a router-level blocklist all variants
A small trim difference in the connected features. Australian owners report the Excite 51 missing demister control in the iSMART app, while the other remote functions work as on the higher trims. On the Essence the app covers locking and unlocking, air conditioning, geofencing, charge settings, finding the car and sharing a digital key. Worth knowing if you were counting on clearing the screen remotely on a cold morning.
Sep 2023AUAustralian Excite 51 as reported in 2023
Australian owners put digital key reliability at roughly three times out of four, which is enough to be useful and not enough to leave the physical key at home. The account holder can share access with other users, so a household can have several phones authorised rather than passing one fob around. Treat it as a convenience that usually saves you reaching for the key rather than as a replacement for carrying one.
Sep 2023AUReported on Australian cars in 2023; applies across the range all variants
A harmless oddity worth recognising so you do not chase it: the connected system's date announcement has shown 1 January 2019 while the time, location and weather were all correct. Nothing depends on it and nothing else is affected. If you see it, it is a known cosmetic bug rather than a sign that the car's clock or connectivity is broken.
Sep 2023AUReported on an Australian car in 2023; variant not stated all variants
Built-in satellite navigation starts at Essence 64, so on the Australian-market Excite 51 and Excite 64 there is none and maps depend entirely on Apple CarPlay or Android Auto.
May 2025AUExcite 51 LFP and Excite 64 NMC, Australian market
MG's cause list for "poor or no GPS signal received" is short: the location you are testing in, the communication module antenna, and the head unit. The important part is that second item - the satellite fix reaches the navigation system through the antenna belonging to the communication (telematics) module, the same module that carries the car's connected services. That is a useful thing to know if your car has both a navigation that cannot place you accurately and an app that struggles to see the car: rather than two unrelated faults, they can be one shared aerial or one shared module, and it is worth reporting them together rather than as separate jobs.
2022GeneralUK/EU service volume; the hardware relationship is general, but connected-service availability is market specific. all variants
When the car cannot get a satellite fix, MG checks the location first - away from magnetic interference, underground car parks and tunnels - then the communication module antenna, and only then the head unit itself. So the GPS aerial belongs to the telematics or communication module rather than to the infotainment unit. That explains why navigation position problems and connected-app problems can turn up together on the same car, and why updating or replacing the touchscreen does not necessarily fix a car that keeps losing itself. If your car repeatedly shows the wrong position on the map, ask the dealer to check the communication module aerial specifically rather than accepting a head unit software update as the answer.
May 2022GeneralWhich module owns the GPS aerial and MG's diagnostic order for a poor fix; UK/EU document. all variants
Only the Essence 64, Long Range 77 and XPOWER have built-in sat-nav, so the MG4 navigation update that added a basic EV trip planner and charging-stop suggestions never reached either Excite grade.
May 2024AUEssence 64, Long Range 77, XPOWER only — not the Excite grades
On nav-equipped cars the factory navigation chimes and flashes an on-screen alert at every suburb boundary with no dedicated off switch, so the reliable workaround is to navigate with CarPlay or Android Auto instead.
Feb 2025AUEssence 64, Long Range 77 and XPOWER (nav-equipped variants), Australian market
Sat-nav map updates arrive on a USB stick rather than over the air, and they only apply to the nav-equipped Australian trims - Essence 64, Long Range 77 and XPOWER - because the Excite cars have no built-in maps at all.
Feb 2025AU+UKEssence 64, Long Range 77, XPOWER 64 (nav-equipped), Australian market
An Australian review found the built-in navigation choosing strange routes and quoting travel times considerably longer than other mapping services, and losing GPS tracking in tunnels rather than dead-reckoning through them. For most owners this is an argument for using CarPlay or Android Auto for navigation and leaving the built-in system for occasions when you have no phone. The reviewer also saw the touchscreen freeze during boot.
Apr 2024AUAustralian cars as tested in 2024; the Excite 51's navigation fitment is not stated, so all variants are listed
If the head unit says permissions must be granted to the Navigation app in system settings, the car is only missing its privacy consents, and re-accepting them in Settings brings navigation back.
Nov 2023AUEssence 64 and other nav-equipped variants, Australian market
The MG4's built-in satellite navigation gives visual and audible alerts as you cross from one suburb into another, which owners find intrusive on a long drive through built-up areas. As of early 2025 the ability to turn those alerts off was listed as something MG was considering rather than something you could switch off. Customer-installable map updates over USB were similarly described as under investigation rather than available.
Feb 2025AUAustralian variants; the source notes the Excite has fewer infotainment features but does not state its navigation fitment, so all variants are listed
A software update added a basic electric-vehicle trip planner to the built-in navigation, including suggested charging stops along a route. It applies to the variants that have satellite navigation, which in the Australian line-up means Essence 64, Long Range 77 and XPOWER. It is basic rather than a replacement for a dedicated planning app, but it removes the need to reach for a phone for straightforward trips.
2024AUAustralian variants fitted with satellite navigation: Essence 64, Long Range 77 and XPOWER
On the Excite 51 with the LFP pack, expect a real-world DC peak of about 85-90 kW, most often 87-88 kW, and only while the battery is below roughly 50% state of charge.
Apr 2024AU+UKExcite 51 LFP only
Expect roughly 85-90kW peak DC on the Standard Range LFP rather than the 117kW originally advertised in the UK; MG later revised its published maximum to 87kW, and MG Australia lists 88kW for the Excite 51.
Apr 2024AU+UKExcite 51 LFP only
If you're buying the 50.8kWh LFP Excite 51, expect a DC peak of about 88kW and a single-phase 6.6kW onboard AC charger, well short of the 64kWh NMC cars that peak near 140kW on DC.
date not establishedAUExcite 51 LFP only — the 64/77 NMC cars run to ~140kW+
Early marketing for the Standard Range quoted 117 kW DC. Owners consistently measure 85 to 88 kW at best, and MG's own stated figure was later revised down to about 87 kW. Do not plan a trip around the original number. The peak is only available at a low state of charge with a warm battery, so arriving at a fast charger with a nearly empty pack matters more than finding a higher-rated charger.
Apr 2024General51 kWh LFP Standard Range, equivalent to the Excite 51; the larger NMC packs charge faster
The MG4 runs one air-conditioning compressor for two jobs: cooling the cabin through the evaporator, and cooling the traction battery through a refrigerant-to-coolant chiller. MG states plainly that where the two demands cannot both be met at once, the system gives priority to battery cooling over passenger compartment cooling. It also describes the sequence when you are not asking for cabin cooling at all: the chiller's expansion valve opens first, then the compressor starts. The practical effect is that on a hot day at a DC charger, or after sustained hard driving, the air from the vents can go noticeably less cold for a while. That is the designed behaviour protecting the pack, not a failing air-conditioning system.
2023GeneralShared refrigerant circuit behaviour described in MG's UK/EU training material; the mechanism is a vehicle characteristic and should not differ by market. all variants
The pack has its own coolant loop — pump, chiller, expansion tank and, where fitted, a high-voltage PTC coolant heater. MG heads that section "if fitted", so not every car has a battery heater at all. Where it is fitted, the described behaviour is: the BMS watches the coldest cell in the pack, the vehicle controller starts the battery water pump when the minimum temperature falls below a threshold, the PTC then heats the coolant and modulates its output in real time until the pack is warm enough, and the BMS stops the heater before switching off the pump. MG describes the heating cycle as one that can start during fast charging at low temperature. Battery cooling, by contrast, is described as running both while driving and while fast charging. This is manufacturer-side confirmation of what owners see: cold-weather DC charging speed depends on getting heat into the pack, and MG does not describe any user-initiated pack preconditioning on the way to a charger.
2023GeneralUK/EU training material; the 'if fitted' qualifier means the hardware may vary by market and build. all variants
Plan DC stops on a 64 kWh NMC car as short 20-60% splashes rather than 10-100% sits: it pulls hard to about 50% state of charge and then tapers steeply, so above 80% you pay road-trip time for very little range.
Aug 2023AU+UK64 kWh and 77 kWh NMC variants (Excite 64, Essence 64/77, XPOWER)
Budget extra time for mid-afternoon DC stops in an Australian summer rather than assuming the published peak rate: one Portuguese Standard Range owner saw charging collapse from about 82 kW to 30 kW at 40C ambient.
Aug 2024UK/EUreported on NMC variants; LFP is described by owners as more heat-tolerant
If your Gen 1 MG4 (2022-2023 build) AC-charges normally but rejects all DC rapid charging, UK owners on the MGEVs forum found the fix was dealer-side: software updates across several modules, or a new Combined Charging Unit.
May-Jun 2024UK/EUGen 1 MG4 (2022–2023 build), reported on SE LR all variants
Plan road trips on realistic DC rates rather than the 140 kW brochure figure - a 2024 Australian test saw only about 25-50 kW from typical chargers.
Jun 2024AUAustralian MG4 Essence 64 tested; applies to all 400V MG4 variants
Expect reduced DC charging speed on cold mornings: the MG4's 'intelligent' battery heating engages only below about 10°C to prevent cold-gate, so it is protective rather than a fast-charge preconditioner.
Apr 2024UK/EUall 2023 MG4; most punishing on LFP 51
Setting a charging stop as the destination in the car's own satnav will switch battery heating on, but trims without built-in navigation have no way to trigger it.
Nov 2024AU+UKtrim-dependent; reported on UK SE vs Trophy, check nav presence on AU spec all variants
An Australian Essence 64 owner hit non-operational DC chargers at Port Macquarie, Taree, Nabiac, Karuah and Hexham on a single trip, and the delays pushed them into Sydney peak hour so a six-hour drive took eight and a half. Their standing advice is to stop more often and take short top-ups rather than relying on one big planned charge. Plan Australian country legs around charger redundancy, not the car's range.
date not establishedAURegional NSW road trips on the Pacific and Hume corridors all variants
On an Australian 1000 km road test the MG4 talked to Tesla's chargers easily and took 22 kWh in 25 minutes, while a nominally 75 kW BP unit at Marulan peaked at only 22 kW and NRMA/Chargefox stops needed repeated authentication attempts. A long-term Essence 64 owner independently rates every network except Tesla as woeful for reliability. Route Australian trips via Superchargers where you can.
date not establishedAURegional NSW DC charging; the charger was the limit, not the car's own cap all variants
Two things govern how fast you actually charge. The first is state of charge: peak power is available below roughly half, and the rate tapers noticeably above that, so on a long trip two shorter stops often beat one long one. The second is battery temperature, with the sweet spot around 25 to 30 degrees. Owners report the car's battery heater only comes on below about 10 degrees, so on a cool but not cold day you can be well below the ideal temperature with nothing intervening to fix it.
Apr 2024GeneralReported on the Standard Range but the state-of-charge taper and temperature dependence were discussed as applying across the range; per-variant thresholds not separated all variants
The 64 kWh pack is 61.7 kWh usable once the buffer is taken out, which is the number worth using for your own efficiency sums. Peak DC power is around 142 kW with an average of about 107 kW across a 10 to 80 percent session, working out to roughly 25 minutes in good conditions. AC is 6.6 kW single-phase as standard with 11 kW three-phase offered in some markets.
Undated specification page, retrieved September 2026General64 kWh NMC pack; the 51 kWh LFP and 77 kWh packs have different figures
The 51 kWh car's DC peak is around 87 kW, and that is what limits it rather than the charger. Plugging into a 150 kW unit does not shorten the stop; 10 to 80 percent still takes roughly 35 minutes. That is about ten minutes longer than the 64 kWh car takes for the same percentage despite the smaller pack, because the bigger pack pulls far more power. Worth knowing when planning a trip: pick the charger for availability and price, not for its headline rating.
Undated specification page, retrieved September 2026General51 kWh LFP pack only
The Long Range's DC peak is around 144 kW, slightly above the 64 kWh car, and a 10 to 80 percent stop takes about 30 minutes. Because the pack is larger, that same 70 percent window puts substantially more energy in than it would on a smaller car, so the Long Range gains more range per minute plugged in than any other MG4. It is also the only variant offering 11 kW three-phase AC as an option.
Undated specification page, retrieved September 2026General77 kWh NMC pack only
Measured in Australia, charging to 80 percent took roughly 37 minutes in the Excite 51, limited by its 88 kW peak, against about 28 minutes in the XPOWER at up to 140 kW. The smaller battery does not mean the shorter stop. If you regularly do long trips, the charging speed difference between variants will affect your day more than the range difference does, because it is time you spend standing still.
Apr 2024AUAustralian Excite 51 and XPOWER as tested; other variants sit between them
This one is genuinely disputed and worth resolving for yourself. Published Australian specifications list the Excite 64 with the same 140 kW DC capability as the Essence 64. Australian owners on the other hand report the Excite 64 being limited to around 88 kW, taking roughly 40 minutes where the higher trims take about 25. That is a large practical difference on a road trip. If DC charging speed matters to you and you are considering the Excite 64, get the answer in writing from the dealer rather than relying on either source.
Dec 2024AUAustralian Excite 64 versus Essence 64; the dispute concerns the Excite 64 specifically
An Australian owner on a 1,200 km trip found that starting the day with a battery cold from sitting overnight limited DC charging to about 70 kW until it warmed, against a consistent 86 kW once up to temperature. This is the practical reason to do your first fast charge of the day after some driving rather than immediately on setting off. The same owner noted the pack takes about ten minutes to cool back down after a fast charge before consumption readings settle.
Oct 2024AUMeasured on an Australian car; the temperature dependence applies across the range all variants
An Australian owner's measured DC session shows the taper better than any specification does. Going from 32 to 82 percent took 23 minutes. Continuing from 82 to 93 percent took a further 15 minutes for barely a fifth of the energy. That is the cliff everyone talks about, in real numbers. On a road trip the arithmetic is unambiguous: unplug in the low eighties and drive to the next charger rather than waiting for a full battery.
Jul 2024AUMeasured on an Australian car; the taper shape applies across the range all variants
Australian owners have hit connected-but-not-charging at Tesla Supercharger sites, while others charged successfully at different sites on the same network. In at least one case the stalls that failed were subsequently showing as out of service in Tesla's own app. The practical lesson is not to conclude your car is incompatible after one bad site: check the app for stall status, try a different stall, and try another site before assuming a fault.
Sep 2023AUReported by Australian owners in 2023; applies across the range all variants
The most sobering number in three months of careful Australian record-keeping. Across 4,223 km, DC fast charging worked out at $10.70 per 100 km, against $9.80 per 100 km for the diesel Golf the owner had replaced. Home charging on solar came to $2.96 per 100 km, and the blended average across all charging was $5.75. Fast charging made up 35 percent of his energy. The saving in running an electric car is entirely in where you charge it, not in the car.
Dec 2023AUAustralian Essence 64 over 4,223 km of mostly highway driving
Asked whether an MG4 would need an adapter for the CHAdeMO chargers near Woodend, forum members answered no: the MG4, like almost all EVs sold in Australia, uses CCS2 plugs and cables, and CHAdeMO is an obsolete standard used only by a couple of older Japanese models. The practical point is that a CHAdeMO-only site does nothing for you, so filter your trip planner to CCS2 before committing to a country leg.
date not establishedAUOlder regional Australian DC sites with CHAdeMO and CCS2 on one unit all variants
An Australian owner charging at Taree after the car sat out overnight in the cold could only pull about 70 kW until the pack warmed, then consistently maxed at 86 kW for the rest of the trip. They also saw noticeably elevated consumption for roughly ten minutes after every DC stop — most likely the pack cooling running — before it settled back to about 17 kWh/100 km at 110 km/h. Don't read either as a fault.
date not establishedAUFirst DC stop of the day after an overnight cold soak, and the first ten minutes after any DC stop
At launch in 2022 the 64 kWh MG4 was quoted as taking up to 125 kW on DC, reaching 80 percent in about 35 minutes. Later specifications for the same battery quote 140 to 144 kW and around 25 minutes. If you are buying an early used car on the strength of a current specification sheet, the charging performance may not match. Ask what the car actually achieves rather than what the model is capable of today.
Jul 2022GeneralEarly 64 kWh cars from launch; later cars of the same battery size are quoted higher
A Western Australian owner reported his motoring club membership giving a 20 percent discount at one charging network's sites, on top of that network being competitively priced to begin with. If you already hold a motoring club membership for roadside assistance, check whether it carries charging benefits before you sign up to networks at full price. Over a year of regular public charging that discount is worth more than most of the accessories owners agonise over.
May 2024AUWestern Australian owner; discounts vary by state and network all variants
An Australian owner's first DC fast charge stopped at 80 percent and briefly puzzled him, until he remembered he had set the battery health charge limit to 80. Worth remembering before you complain to the network or move to another stall: on the NMC cars the limit setting applies to DC charging as well as AC, and it will end a session cleanly at whatever you set. Raise it temporarily if you genuinely need the extra range for a leg.
Oct 2023AUNMC variants with the charge limit setting; the Excite 51 does not have it
In the 2023 Australian MG4 range only the Essence 77 Long Range had 11kW three-phase AC charging; the Excite 51, Excite 64, Essence 64 and XPOWER are single-phase 6.6kW and cap there even on an 11kW three-phase unit.
May 2024AUAustralian variants; 11kW on Long Range 77 only all variants
If AC charging aborts early - stopping around 74-78%, or dying within about 15 minutes on a granny lead - while DC rapid charging still works at full rate, UK owners have had the charge control unit replaced under warranty.
Oct–Nov 2023UK/EUPhase 1 / early-build Long Range cars with the three-phase onboard charger; UK naming SE LR
UK owners report the MG4 locks its doors when a charge starts, and that opening a door or unlocking the car interrupts an AC (Type 2) session, while CCS DC rapid charging reportedly carries on regardless.
Oct 2022 - Jul 2025UK/EUMG4 2022–2025, all variants
If the charge plug won't release, locking and unlocking with the key fob three or four times usually frees it, so stand at the socket because it re-locks after a few seconds.
Nov 2023Generalall 2023 MG4
If a charge does not start, first check you have not set a timer in two places: UK owners report the car or iSmart schedule and the wallbox schedule fighting each other, so pick one master and delete the schedule from the other.
Jun-Jul 2024UK/EUall 2023 MG4 variants, any market
MG's charging system layout lists two alternatives for the same position in the car: an 11 kW combined charging unit and a 7 kW combined charging unit, each marked "if equipped". The onboard charger is a physical box bolted in and plumbed into the coolant circuit, taking AC from the socket, converting it and feeding the high-voltage pack. So whether your car can use three-phase AC at the higher rate is a matter of which hardware was fitted at build, not a setting, a dealer update or an app toggle. If you are shopping and want the faster AC rate, buy a car built with the larger unit - changing it later is a component swap, not a configuration change.
2023UK/EUCharging hardware fitment; figures quoted are UK/EU and may not match Australian ratings. all variants
The Combined Charging Unit - the box that handles charging from a wall socket or charge point - is not air-cooled; it sits in one of the car's coolant loops and has its own water inlet and outlet pipes. MG's symptom table lists 'fluid leak' as a recognised complaint against that unit, and the only cause it expects is damage to those external cooling pipes or the clamps holding them on. So a coolant smell or a coloured puddle under the front of the car is not automatically the battery or the motor loop - the charger's own plumbing is on MG's list, and it is a pipe-and-clamp repair rather than a new charging unit.
May 2022GeneralFirst-generation MG4 Combined Charging Unit cooling circuit; UK/EU document, mechanically the same car as the Australian one.
If the charging connector will not come out of the car, MG's second diagnostic step - before any fuse, relay or module work - is to open a service access in the right-hand luggage compartment trim panel, pull the charge port emergency cable, and try the plug again. That is a manufacturer instruction to release the lock mechanically from inside the boot. For an owner it is the difference between being stuck at a public charger with the cable held hostage and being on your way in a couple of minutes. Worth knowing before you need it: find the access flap in the boot side trim now, in daylight, rather than at night in a car park. The same cable is the reason the car can be freed even when the electrical unlock has failed.
May 2022GeneralMG4 charge port lock release; source is a UK/EU repair-information release. all variants
MG's cause list for both "connector cannot be plugged in place" and "connector cannot be unplugged" includes a dedicated charging connector lock fuse and a charging connector unlock relay, checked before anything expensive. Ahead of those, the manual asks for the obvious physical checks: the plug itself deformed or sticking, the port blocked or damaged, and the port seal ring failed. Only after the fuse and relay does it reach the vehicle control unit, and even then it calls for a software reflash before replacing it. So if you are quoted for a new charging port because the plug is not latching, it is reasonable to ask whether the lock fuse and the unlock relay have been checked, and whether the port is simply blocked or the plug damaged. Grit, ice and a bent pin in the connector are all on MG's own list before the car is blamed.
May 2022GeneralMG4 charge port lock faults; source is a UK/EU repair-information release. all variants
MG lists "fluid leak" as a standalone symptom for the Combined Charging Unit, with a single expected cause: damaged coolant inlet or outlet pipes, or their clamps, on the outside of the unit. That confirms the unit that charges the car from a wall socket is plumbed into the car's cooling system rather than being air-cooled, and that its hoses are a service item in their own right. For an owner, the takeaway is that a coolant puddle or a coolant smell under an MG4 is not automatically a battery or motor cooling problem - the charging unit has its own pipes in the same system, and MG expects them to be checked as a distinct fault.
2022GeneralUK/EU service volume; describes hardware present on the model generally.
The high-voltage components on this car are linked by an interlock loop that proves every high-voltage connector is properly mated. MG lists the loss of that signal as its own symptom, with the consequence stated plainly: high-voltage power cannot be supplied to the vehicle. The car will not drive and will not charge, and the causes MG expects are a damaged, corroded, deformed or poorly mated high-voltage connector at the charging unit, a fault inside that connector's interlock circuit, or the unit itself. MG's own procedure begins by isolating the pack with the manual service disconnect before anything is touched. For an owner this is a car that appears completely dead in the drivetrain despite a healthy 12V system and no obvious damage - and it is a plausible consequence of underbody impact, flooding or badly done work under the car. It is emphatically not a DIY investigation.
2022GeneralUK/EU service volume, in the Combined Charging Unit chapter; the interlock principle applies to the model generally.
MG's procedure for "slow charging unavailable" does not begin at the car at all. Step one is the mains supply, and MG spells out checking whether the neighbours have power and whether the main switch or a branch breaker at the house has tripped. Step two is whether the socket or extension the charger is plugged into actually has power. Step three is to try a different charge point and, if that works, tell whoever owns the failed one. Step four is to try a different charging cable, because a broken conductor inside a cable is an expected fault. Only after all four does the procedure move to the car's charge port and its charging module. All four are things you can do yourself before booking a diagnosis.
2022GeneralAC charging that will not start at all, at home or on a public AC post
MG's symptom list for a charging port door that will not release has only two entries. The first is the flap itself being deformed, blocked or fouled. The second is the release cable, which MG says may be damaged or broken, or may have one of its two ends sitting out of position - either at the pull handle or where it locates in the charge port door's mounting groove. There is no motor, module or software step anywhere in the procedure. The practical reading for an owner is that a flap which has never worked properly since a repair, a service or a knock is far more likely to be a misplaced or stretched cable end than an electrical fault, so it should be a cheap mechanical fix rather than a module replacement. It also confirms that the flap genuinely has a mechanical release path rather than depending on the car being awake.
May 2022GeneralHow the MG4's charge port door release works; from the UK/EU-published MG4 manual, but the mechanism is not market-specific. all variants
The specification table for the combined charging unit gives the two versions fitted to the MG4 and, importantly, separates what goes in from what comes out. The 7 kW unit is rated at 6.6 kW maximum output to the battery and the 11 kW unit at 10 kW. So the gap owners measure between what a three-phase wallbox says it is delivering and what the car actually takes is designed in, not a fault with the charger or the car. The same table shows the other half of this unit's job: on the low voltage side it puts out 9 to 16 volts at a rated 2.5 to 3 kW with a 3 kW peak, which is the real ceiling for everything on the 12 volt system - useful if you are planning to add an amplifier, a fridge or a camera setup.
Jul 2023GeneralMG4 EV, first-generation; both 7 kW and 11 kW combined charging unit versions all variants
MG's own description of the high-voltage layout makes the split explicit. Slow AC charging goes in at the charge port, through the combined charging unit which converts it, then on to the high-voltage distribution unit and into the pack. DC fast charging bypasses the charging unit entirely and runs from the port through the distribution unit straight to the battery. Two things follow for owners. A fault in the onboard charging unit can leave a car that rapid-charges faultlessly but will not take a wallbox or a granny lead at all - and the reverse pattern points instead at the distribution side or the pack. It is worth saying out loud at the service desk, because a technician who plugs into a rapid charger, sees it work and hands the car back has not tested the AC hardware at all.
Jul 2023GeneralAll first-generation MG4; describes the physical high-voltage architecture, not a market option.
In the 2023 Australian MG4 range only the Essence / Long Range 77 has the 11 kW three-phase onboard AC charger; the Excite 51, Excite 64, Essence 64 and XPOWER all charge at 6.6 kW single-phase.
May 2024AU2023 Australian range; 11 kW AC is Essence/Long Range 77 only all variants
One UK MG4 Essence owner found that with the schedule held entirely on the wallbox and none in the car, the charger energised at midnight but the car only sometimes accepted power, until a dealer updated the charge-port firmware.
Oct-Nov 2024UK/EU2023 MG4 Essence; fixed by charge-port/EVCC firmware
Expect to pay for more kWh than the car actually receives on a granny charge, so meter at the wall rather than reading the car's display if you are costing charging per kWh.
Nov 2022UK/EUall variants; measured on a UK granny charge, worst at low amps
If yours is a 64 kWh car, a three-phase wallbox buys you nothing: in the Australian range only the Essence/Long Range 77 has an 11 kW three-phase on-board charger, and every other variant is capped at 6.6 kW single-phase.
Oct 2023AUAustralian MG4 Essence 64 (and other 6.6 kW single-phase variants)
On a solar-diverting wallbox in eco or surplus mode, one UK owner reported his MG4 would not restart when surplus returned after the charger paused, so test excess-PV charging on your own charger before relying on it.
Jun 2024UK/EUall 2023 MG4 on surplus/eco-mode wallboxes
The charge brick supplied with Australian MG4s draws a maximum 8A (1.84 kW at 230V) and its current is not adjustable, so owners report only about 1.2-1.6 kW actually reaching the drive battery.
Oct-Dec 2024AUAustralian-delivered MG4 (the AU-supplied charge brick) all variants
If a charging schedule is set in the car, the iSMART app or your wallbox app, the MG4 can refuse to start AC charging outside that window, including at a public AC charger, so set a schedule in one place only.
Apr 2025AU+UKall 2023 MG4, Australian market
On a single-phase car, 6.6 kW at 230 V is about 28.7 A, so a 16 A-rated Type 2 lead physically cannot deliver it and pegs you at roughly 3.68 kW. Owners get caught because an '11 kW' three-phase cable is often only 16 A per phase, which is useless on a single-phase MG4. Buy a 32 A-rated lead for destination and public AC charging.
date not establishedAUAny MG4 charging single-phase AC with an owner-supplied Type 2 cable all variants
Australian owners on Whirlpool quote about $700 for a plain non-smart ('dumb') fast charger — that figure is the hardware only, with installation quoted separately at roughly $500-$800 — $1,284.64 quoted in Perth where an old 1980s fusebox had to be dealt with, and about $2,500 installed for a solar-diverting Zappi, reaching roughly $4,500 for one owner once the powerbox was upgraded too. Posters also confirm you can schedule charging from the car's own screen, so a smart charger isn't required just to shift charging into an off-peak window. Get the switchboard assessed before you accept a headline install quote.
date not establishedAUAustralian home installs; cost driven mostly by switchboard age and cable run
If you are choosing a home charger, the AC limit is set by the car, not the wallbox. In the Australian range only the Essence 77 Long Range has a three-phase onboard charger. The Excite 51, Excite 64, Essence 64 and XPOWER all have a single-phase 6.6 kW onboard charger, so plugging them into an 11 kW three-phase wallbox still charges at 6.6 kW. A three-phase wallbox is not wasted money if you may change cars later, but it will not make these variants charge any faster today.
May 2024AUAustralian variants; 11 kW three-phase on Long Range 77 only, all others 6.6 kW single-phase
Australian owners report scheduled charging occasionally not stopping at the set end time and needing manual intervention. The pattern several of them converge on is that scheduling set through the car's own settings is more reliable than scheduling through the phone app, which depends on the car being reachable over the network at the right moment. One owner's failure coincided with a mobile network outage, which fits. If your off-peak charging matters financially, set it in the car and treat the app as a convenience.
2026AUReported by Australian owners; variant not identified as a factor all variants
Australian owners hitting scheduled charging failures found a simple recovery: press finish charging and then start charging in the app, which restores normal behaviour. The underlying pattern several owners describe is that stopping a charge from the app can leave the system ignoring subsequent schedules until it is reset this way. Owners who want certainty use a smart wall socket or home automation to control the supply instead, which takes the car's scheduler out of the loop entirely.
Mar 2025AUReported by Australian owners; variant not identified as a factor all variants
The supplied portable charger pulls around 8 amps continuously, which is a sustained load rather than the intermittent draw most household extension leads see. Australian owners advise using an approved extension of at least 1.5 mm squared conductor, and avoiding old or corroded leads entirely. A thin or damaged lead carrying 8 amps for eight hours is a genuine fire risk, and it is one of the few things about EV charging that actually deserves the caution people apply to it.
Dec 2024AUAustralian owners using the supplied portable charger; applies across the range all variants
Australian owners on dedicated off-peak electric vehicle tariffs report rates as low as around 5 cents per kilowatt hour overnight. At that price, 400 km of weekly driving costs roughly $3.40 in electricity, against $40 to $45 of fuel for a hybrid covering the same distance. One owner with solar recorded a 102 km trip using 16.8 kWh at a marginal cost of about 16 cents. The tariff matters far more than the car: the same driving on standard daytime rates costs several times as much.
Oct 2024AUAustralian owners on off-peak or solar charging; applies across the range all variants
Australian owners report home charger installation costs spanning about $1,284 to $2,500 and upward, with the spread driven almost entirely by what your existing electrical infrastructure needs. A straightforward run from a modern switchboard sits at the bottom; an older board needing an upgrade, or a long cable run to a detached garage, pushes it up. Solar-aware units that balance charging against household generation, such as a Zappi, sit around the $2,500 installed mark.
Oct 2024AUAustralian installation costs; independent of variant
Concrete numbers for planning home charging. The supplied portable charger at 8 amps takes around 30 hours to fill the battery from empty, which is why owners describe it as an emergency charger rather than a daily solution. A 7 kW wallbox does a 51 kWh car in under eight hours, and a 32 amp supply adds roughly 150 to 170 km of range in four hours. If your daily driving is under about 50 km, overnight on the supplied charger genuinely does keep up; beyond that it will not.
Oct 2024AUAustralian owners; times quoted for the 51 kWh car, longer for larger packs all variants
An Australian owner tracking three months and 4,223 km put home charging at $2.96 per 100 km with 45 percent solar, against $10.70 per 100 km for DC fast charging. That is the real economics of an electric car in one comparison: the running-cost advantage over petrol comes from charging at home, and it largely evaporates if you rely on public DC. If you cannot charge at home, model your costs on the public price before assuming the savings will materialise.
Dec 2023AUMeasured on an Australian Essence 64; the ratio applies across the range all variants
When charging from a household socket, roughly 1.7 kW at the wall becomes about 1.5 kW into the battery, with around 200 watts going to the onboard charger and battery management rather than into the pack. Because the overhead is roughly constant, it hurts proportionally more the slower you charge. Over an eight hour overnight session you may add 12 kWh to the battery while paying for 14 or 15. It is not a reason to avoid the granny charger, but it is worth knowing your electricity bill will not match what the car says it received.
Feb 2024AUMeasured on an Australian car with the supplied portable charger; applies across the range all variants
MG files a charge flap that will not open under the door system, alongside the side doors and the tailgate, and the reference circuit it points to is the door locking system. The causes it lists are the flap sticking or being damaged, the wiring to the flap's own little motor, the flap assembly itself, and then the body computer. Nothing in the chain is a charging component. That reframes the problem usefully: if your flap will not release, the fault is in body electrics and locking, which is why cycling the car's locking has worked for owners as a way of prompting it, and why the state the car is in matters more than anything to do with the charger or the cable.
May 2022GeneralMG's own classification and cause list for a charge port door that will not release; UK/EU-published manual. all variants
Single-owner Australian tests in 2023 measured an Essence 64 at about 6.4kW against its 6.6kW rating and an Essence 77 at about 9.6-9.7kW on an 11kW three-phase charger, useful sanity figures if your wallbox reads low.
Oct 2023 - May 2024AUAustralian Essence 64 and Essence 77
One UK owner reported his car reverting to 'Scheduled Charging: On, 22:00-06:00' after a dealer update even though he had saved it Off, so it is worth re-checking the charging-schedule screen after any dealer software work.
Jun 2024UK/EU2023 MG4, reported after Gateway/BCM/Selector updates all variants
The release cable behind a pop-off panel in the boot, on the same side as the charge socket, does free a cable the car won't let go of. But after one owner used it, the car would no longer accept charge from any public charger or home wallbox and needed a whole new charge port. Treat the release as a last resort, not a routine trick, and try the fob and in-car controls first.
date not establishedGeneralAny MG4 with the boot-mounted emergency release; applies whenever the cable locks on. all variants
A measured test on an Australian Essence 77 found the car drawing roughly 9.6 to 9.7 kW from an 11 kW three-phase charger, about ten percent below the headline figure once cable and heat losses are counted. That is normal rather than a fault, and it lines up with MG's quoted seven hours for a full charge. Budget your overnight charging on the real figure, not the sticker.
May 2024AUAustralian Essence 77 Long Range on a three-phase 11 kW AC charger
A West Australian owner doing 130 to 180 km round trips twice a week charges on a portable 20 amp three-phase unit delivering about 4.2 kW, deliberately between 9am and 3pm to use his own solar. That takes him from around 40 percent to full in roughly six hours, comfortably inside the daylight window. If your driving is regular and moderate, a modest portable charger matched to your solar generation can be a better answer than the fastest wallbox you can fit.
May 2024AUWestern Australian Excite 51 owner; the approach applies to any 6.6 kW single-phase MG4
Measured by an Australian owner, the supplied portable charger pulls roughly 1.2 kW rising to about 1.6 kW as the 12V battery finishes topping up. That is a genuinely slow rate: it will add perhaps 8 to 10 kWh overnight, which is fine for a short daily commute and nowhere near enough to recover a big battery from low. If the granny charger is your only option, the 51 kWh car is a much easier proposition than the 77.
2025AUMeasured on an Australian car with the supplied portable charger all variants
Unlike DC charging, AC charging does not taper progressively. Owners report it holding full rate until around 99 point something percent and only then throttling back, which is the cell balancing step rather than a limitation. This is why an overnight charge to 100 percent takes barely longer than one to 95, and why there is little to gain from setting a limit just below full if your reason for doing so was to save time.
Jul 2024AUReported on Australian cars; applies across the range all variants
An Australian owner with free workplace charging noted it as the single largest factor in his running costs, outweighing everything about the specification of the car. It is worth checking before you buy: an employer with chargers, a shopping centre with free AC, or a council car park with subsidised charging can matter more to what the car costs you than choosing between a 51 and a 64 kWh battery. It also changes which variant makes sense, since cheap top-ups reduce the value of a bigger battery.
Sep 2023AUAustralian owner experience; applies across the range all variants
On the Excite 51 LFP, charge to 100% on AC regularly and leave it plugged in for a while afterwards — UK MG EV forum owners report the BMS only starts cell balancing once an AC charge reaches 100%.
Jan-Feb 2025UK/EUExcite 51 LFP
Leave the Excite 51 LFP plugged in for another 30-45 minutes after it reaches 100% on AC, because cell balancing only happens at the top of charge and unplugging straight away skips it.
Aug 2023GeneralExcite 51 LFP (the NMC cars are conventionally kept to ~80%)
Keep an NMC car near 80% for daily use and only take it to 100% before a long trip — UK owner consensus on the MG EV forum is that NMC packs balance at whatever target state of charge you set.
Jan-Feb 2025AU+UKExcite 64, Essence 64, Long Range 77, XPOWER 64 (NMC)
Run a wide charge from about 10% up to 100% roughly every three months if you want a meaningful state-of-health reading — an ordinary top-up tops and balances the pack but does not calibrate SoH.
Dec 2024UK/EUall variants; most discussed for LFP 51
Don't hunt for a maximum-charge-percentage setting on the LFP Excite 51 — Australian owner testing published in 2023 found that option only on the NMC cars (Excite 64, Essence 64, Essence 77, XPOWER).
Oct 2023AUExcite 51 LFP only (Australian market variants confirmed)
Set your charge limit on the car's own screen rather than in the app: UK owners report iSmart can forget the target percentage or time, and the car and the app can disagree about which target applies.
Nov 2023-Mar 2024UK/EUNMC variants with the target-SoC feature
The advice to stop at eighty percent comes from nickel-based batteries and does not transfer to the LFP pack in the 51 kWh car. LFP sits at a flatter voltage across most of its range, which makes the battery management system's state-of-charge estimate drift. Owners report that roughly monthly, one uninterrupted charge from below about ten percent all the way to 100% lets the system recalibrate, and the range estimate becomes noticeably more trustworthy afterwards. Charging to 100% on an LFP car is not the same abuse it would be on a nickel pack.
Mar 2025GeneralLFP battery only, i.e. the 51 kWh Excite / Standard Range; does not apply to the NMC variants
The clearest statement of the split, from Australian owners running both. The 51 kWh LFP pack tolerates being charged to 100 percent every day and is designed for it. The 61.7 kWh NMC packs should not be routinely taken to full, and owners charge them to around 80 percent day to day and use the remaining capacity only when a trip needs it. This is the single most consequential difference between the two chemistries in daily ownership, and getting it backwards costs you either range or battery life.
Dec 2024AULFP applies to the Excite 51; the NMC guidance applies to Excite 64, Essence 64, Long Range 77 and XPOWER all variants
The chemistry guidance stated plainly for the Australian range: the Excite 51 with its LFP pack can be charged to 100 percent, with occasional full charges actively useful for keeping the battery management system's calibration honest, while the 64 kWh NMC cars are better kept to an 80 percent daily limit. This matches what owners have worked out in practice and what the app exposes, since the charge limit setting is present on the NMC cars and absent on the LFP one.
Jul 2023AULFP guidance applies to the Excite 51; the 80 percent guidance applies to the NMC variants all variants
In MG's official labour time schedule for the MG4, the operation to renew the energy storage system, which is the high voltage traction battery pack, carries a standard time of 1.6 hours. Related operations are similarly modest: the battery cooler is 2.0 hours, the energy storage system heater 1.1 hours, the battery coolant pump 1.0 hour and a battery coolant renewal 1.0 hour. By comparison the same schedule allows 5.3 hours to renew the drive motor control module and 6.1 hours for a rear drive motor assembly.
2023GeneralThe schedule lists the same time across all three specification levels, so all variants are listed
MG's live data documentation describes the high voltage battery state of charge as being obtained by a complicated algorithm rather than read directly, and notes that the resulting signal is used as an input by several other modules including the instrument cluster. The same documentation shows the battery management system tracking a great deal more than the single percentage an owner sees, including the minimum and maximum cell temperature across the pack, obtained by combining the sampled data from each cell monitoring unit, along with per-unit battery temperature signals, coolant temperature and the maximum temperature of the pack's copper busbar.
2023GeneralDocumented for the MG4 battery management system generally, so all variants are listed
On later releases the head-unit file is only half the job: a matching configuration has to be written afterwards with the dealer's tool. Owners who applied only the first half found the charge target could no longer be set - the control was gone, or only 100 percent would register - leaving the phone app as the only way to cap the charge. Some cars in other markets arrived from the factory in exactly that state, with an owner in Chile finding no charge limiter at all on a car that had never been updated, and owners in Turkey being told the fix was for the dealer to reflash the battery management and head-unit modules together. If the charge limit disappears after a service, that is the missing second step rather than a battery fault.
Feb 2026GeneralCharge target setting lost after partial software update, nickel-chemistry variants
Four owners posted long-run figures read with a diagnostic app. One 51 kWh car read about 96 percent at fifteen months, 93 at two years, 91 at three and 90.7 at three and a half; a second 51 kWh car read 96 percent at two years; a 64 kWh car read 94.8 percent at three and a half years; and an owner with about 105,000 km reported no noticeable change at three and a half years. Every one of them said the same thing: the number falls but the range they actually get has not fallen with it. One member argues the figure on the LFP car may be an estimate the software calculates rather than a measurement, which would explain the mismatch. Use it as a rough trend line over years, not as a reading you can act on.
Feb 2026GeneralMulti-year state-of-health readings versus observed range, LFP and nickel packs all variants
The warranty statement puts a number on the battery guarantee that owners usually only hear second-hand. If a capacity check at an authorised MG repairer shows the high-voltage battery has fallen below 70 percent of the capacity it had when the car was delivered, the shortfall below that line counts as excessive loss and MG will act on it. The wording is deliberately staged: where possible MG repairs the affected portion of the pack rather than swapping the whole thing, and if it cannot be repaired the replacement may be a remanufactured battery rather than a new one. The practical consequence is that the trigger is a dealer capacity test, not the range figure on your dash, so a battery claim starts with asking for that test in writing.
Oct 2021UK/EUBattery capacity warranty threshold and remedy, from MG's UK warranty statement. all variants
The official MG4 maintenance check sheet has a dedicated line with boxes for SOC % and SOH % - the technician is required to check and record the high-voltage battery's state of charge and state of health at the service. That is a far better answer to 'how is my battery doing?' than watching the range readout, which is not a capacity meter, and it means owners do not have to buy a diagnostic dongle to get a figure. Ask for the SOH percentage to be written on your invoice at every service; two or three years of those numbers is a genuine degradation record and it is the evidence you would need if the pack ever approached the 70 percent warranty threshold.
2023UK/EUBattery SOH recording is a required service item on MG's MG4 check sheet; UK/EU document. all variants
The later revision of the PDI manual adds a final-preparation step telling the technician to use the car's settings menu to set the maximum charge state to 100 percent, and to reset all the trip computer values to zero with the steering wheel controls. There is a good reason for it - the car then gets a full balancing charge before handover - but the consequence is that a new NMC car arrives with no daily charge cap in place at all. If you intend to run to 80 percent for battery care, set it yourself on the first day rather than assuming the dealer left it somewhere sensible. It also means a brand-new car showing a limit of 100 percent is not evidence of a fault or a half-finished software update.
2023UK/EUUK PDI final-preparation step setting the charge cap to 100 percent; applies to cars prepared to manual revision V1.02. all variants
The high-voltage battery pack description lists a water-cooled cooling system inside the pack and thermal management by coolant as a core function, and the car carries a separate high-voltage PTC battery heater with its own coolant pipes. The heat-pump schematic also shows a battery chiller fed from the air-conditioning circuit through an electronic expansion valve, so the same refrigerant loop that cools the cabin can pull heat out of the pack. MG states directly that the heater is there to warm the battery in low temperatures and that it shortens fast-charge time when charging cold. In practice this is why battery conditioning shows up as extra consumption, and why a pack warmed by a drive accepts far more DC power than one that has sat out overnight.
2023GeneralFirst-generation MG4 high-voltage battery thermal management, from MG's UK/EU description manual. all variants
Among the high-voltage battery's listed functions are insulation resistance detection, high-voltage interlock detection and collision detection, and the pack's own distribution module controls the main positive, main negative and pre-charge relays. In plain terms the pack can and will isolate itself: if it detects an insulation fault, a high-voltage connector opened, or a crash signal, it opens its contactors and the car will not drive. That is designed behaviour, not a failure. It is why a car can be entirely dead after an impact even when little looks damaged, and it is why an insulation or high-voltage warning is not something to keep driving on and hope about - the system is telling you it has found a genuine electrical safety problem.
2023GeneralFirst-generation MG4 high-voltage battery safety functions; general vehicle fact, UK/EU document. all variants
The high-voltage battery pack overheating gets a twelve-step diagnosis, and the order is telling. First is the coolant itself - lost, low, or no longer performing - then the cooling fan and its wiring, then the radiator checked for blockage or leakage and cleaned if blocked, then the expansion tank, then the coolant pump and its relay, and only after all that do the high-voltage components get looked at. Two things follow for an owner. The MG4 genuinely manages its battery temperature with a liquid loop that can fail like any other, which is part of why MG puts the battery and motor coolants on a scheduled replacement rather than treating them as fill-for-life. And the radiator behind the front bumper needs to be able to breathe: packed with mud, bugs, plastic bags or leaves, MG's own documentation says it can contribute to the pack overheating, which is when you lose fast charging speed and, in the worst case, power.
May 2022GeneralMG4 traction battery thermal fault causes; source is a UK/EU repair-information release. all variants
For a battery charge gauge that reads improperly, MG's first step is to compare the number on the display with the value the battery management system is actually reporting to a diagnostic tool. Only if those disagree does it move on - and even then the ordered causes are the instrument software, then the instrument wiring, then the instrument pack itself, then the BMS, and finally the gateway. The power meter is handled the same way, with the inverter unit in place of the BMS. In plain terms: the gauges on your driver display are repeaters, not measuring instruments, and when one of them misbehaves MG expects the display chain to be at fault more often than the thing being measured. If you are worried about your state of charge readout, the useful question at a service is not "is my battery bad" but "what does the BMS say, and does it match what the car is showing me".
2022GeneralUK/EU service volume; describes the vehicle's own data path, applies to any first-generation MG4. all variants
If an MG4 reports the traction battery running hot, MG's published diagnosis never looks inside the pack. The twelve steps are: coolant condition and level, the cooling fan and its wiring, a blocked or leaking radiator, a leaking expansion tank, the coolant pump relay, the pump itself and its wiring, the expansion tank cap's pressure relief valve, the fan shroud, the DC-to-DC converter, the coolant pipework, the drive transmission, and the charger. In other words a battery over-temperature complaint is, in MG's expectation, a plumbing and airflow fault in a shared liquid cooling loop - not a failing battery. The same eight-component list turns up again under high-voltage battery cooling system leakage, so a coolant loss and an overheat are two faces of the same circuit.
2022GeneralHigh-voltage battery over-temperature warnings and coolant loss on the first-generation MG4 all variants
When the MG4's battery management module is replaced, MG's procedure reads the battery data, accumulated mileage and dates out of the old module and writes them into the new one, so the pack's history follows the car. But the manual sets out two separate replacement routes, and only one of them includes that backup step. If the old module has already failed to the point where it cannot communicate, there is no backup and no write-back - the new module simply gets installed and configured. That matters if you are buying used or making a warranty claim, because MG's own threshold for a traction battery claim is a measured capacity drop, and a module that died hard can take the recorded history with it.
Jul 2023GeneralApplies whenever the traction battery management module (BMS) is replaced all variants
If your car is on earlier software, switch scheduled charging on — the target-SoC limit only took effect inside a scheduled window, and with scheduling off the car charges straight past the target.
Nov 2023-Mar 2024UK/EUNMC variants (64/77/XPOWER) on pre-R46 software
On the 51kWh LFP Excite, give the car an occasional uninterrupted AC charge to 100% so the pack can balance and the gauge recalibrate; the NMC 64 and 77 cars should still sit around 80% day to day.
Jul 2024GeneralExcite 51 LFP only; the NMC 64/77 cars should normally be kept to ~80%
Park in shade whenever you can: owners report the MG4 does not appear to cool its battery while simply parked and locked, and MG's Australian manual warns against parking above 45C for more than 15 days.
Jul 2024AU+UKall MG4 variants
In the iSMART app the maximum Target Battery Level only adjusts in 10 per cent increments, and MG's guidance covers it only for the 64 kWh and 77 kWh NMC packs, not the 51 kWh Excite's LFP pack.
Apr 2025GeneralExcite 64, Essence 64, Long Range 77 and XPOWER 64 (NMC packs); not the Excite 51 LFP
Both extremes are worse than the middle for storage. The recurring advice is to leave the car somewhere between about half and eighty percent if it will sit for weeks, avoid leaving it plugged in but not charging for an extended absence, and avoid DC fast charging to 100% unless a trip actually needs it. This is about calendar ageing rather than any immediate risk.
Mar 2025GeneralDiscussion centred on the LFP Standard Range but the storage advice was given as general EV practice; scope across variants not separated in the thread all variants
The Australian MG4's seven-year, unlimited-kilometre warranty is stated as covering both vehicle and battery. That matters more than the headline number, because on an electric car the battery is the component whose replacement cost would otherwise dominate the risk of ownership, and many manufacturers warrant the battery on separate and shorter terms than the car. Unlimited kilometres on a battery warranty is unusual and is one of the strongest parts of the MG4's ownership proposition in Australia.
Mar 2024AUAustralian market; applies across the MG4 range all variants
The consistent advice from experienced Australian owners is that the range estimate, the guess-o-meter, is unreliable for assessing capacity loss. It is derived from recent consumption as much as from the pack, so it moves with the season, your driving, your tyre pressures and whether you have been on the highway. Owners watching it for degradation end up chasing noise. If you want to know how the pack is doing, get a proper state-of-health reading rather than comparing full-charge range against what you remember from when it was new.
2026AUAustralian owner consensus; applies across the range all variants
Owners who want a real answer on battery degradation use a Bluetooth diagnostic dongle with a compatible app to read state of health directly, rather than inferring it from the range readout, which is not a capacity meter. One Australian owner reported 100 percent state of health after several thousand kilometres. The rough expectation owners work to is one to five percent loss in the first year, with ten percent in that period being cause for concern rather than normal.
Dec 2023AUAustralian owners; applies across the range all variants
The benchmark Australian owners work to is one to five percent capacity loss over the first year, with anything approaching ten percent in that period being a genuine cause for concern rather than normal settling. Early loss is also front-loaded: packs typically shed a little quickly and then flatten out, so a first-year figure does not extrapolate linearly. Measure it with a diagnostic tool rather than by comparing range readouts, which move with the weather and your driving.
Dec 2023AUAustralian owner consensus; applies across the range all variants
An Australian owner watched a balancing cycle at the end of a full charge: roughly 30 minutes during which the rate dropped to about 4 kW and then flickered between zero and 0.04 kW. That is the battery management system equalising cells that were not actually level despite the car reading 100 percent. It is normal and it is the whole point of an occasional full charge. Owners also report balancing kicking in during a DC session and slowing a 150 kW charge substantially, which is worth knowing if you are in a hurry.
Dec 2023AUObserved on an Australian Essence 64; balancing behaviour applies across the range all variants
LFP owners reassure each other that partial charges and charging in fits and starts are fine, and that you don't need to keep the battery in a narrow band to protect it, since a cooler pack while charging is if anything better. One owner put numbers on it: around 4,000 cycles in a gentle 45-75 percent window on a roughly 49 kWh pack works out to something like 370,000 km of driving before meaningful capacity loss, well beyond most cars' lives. The practical takeaway is to charge to the level you need when you need it, still doing an occasional full charge for cell balancing, without obsessing over every session.
Aug 2025GeneralLFP cycle life far exceeds car life; no need to baby the charge window
More than one owner has concluded their car has no charge limit at all, because dragging the slider does nothing. The control responds to a tap at the position you want rather than a drag, which is unusual enough that people give up before finding it. You reach it by tapping the battery tile on the home screen and stepping through the tabs; a separate slider on the discharge tab sets how low vehicle-to-load is allowed to take the pack, which is easy to mistake for the charge control. Rule this out before concluding the setting is missing from your car.
Jul 2026GeneralSetting the charge target on the touchscreen, nickel-chemistry variants
A CarScanner state-of-health reading in the low-to-mid 90s on the 51 kWh LFP Excite 51 is normal from early in the car's life, so treat any single figure as indicative only rather than proof of degradation.
Dec 2024UK/EUExcite 51 LFP shows the early drop; 64 kWh NMC reads near 100% much longer
Set your charge target on the car's own touchscreen rather than in the iSmart app, since owners report the app can forget the setting.
Nov 2023 - Mar 2024UK/EUMG4 NMC variants; behaviour depends on firmware version (pre- vs post-R46)
R63 is an infotainment-only update, and flashing it from a USB stick is not the whole job: the car still needs connecting to a computer running SIPS so a configuration can be updated, and if that step is skipped the target-charge slider on the car's screen stops working, pushing you into the app to set a limit. If your charge limit disappeared after an infotainment update, ask specifically for the SIPS configuration rather than another reflash. The same thread notes it is the camera (FVCM) and front radar (FDR) updates that change ACC behaviour, not R63.
date not establishedUK/EUNMC MG4s taking R63 where the dealer did a USB-only infotainment update
Owners of the NMC cars can set a maximum charge percentage, both in the iSMART app's charging management screen and on the centre screen. On the LFP Excite 51 that setting is simply absent. This is not a fault or a missing update, and it is consistent with the general advice that LFP packs do not need to be held below full. If you have an Excite 51 and cannot find the setting, you are not missing anything.
May 2024AUAustralian variants; setting present on the NMC cars (Excite 64, Essence 64, Long Range 77, XPOWER) and absent on the LFP Excite 51 all variants
A real degradation data point rather than a guess: an Australian owner reported the range shown at 100 percent dropping from 415 km when new to 390 km after eighteen months and 32,000 km. That is roughly six percent off the displayed figure, which is a normal early-life trajectory for a lithium pack and is partly the steep initial settling rather than a linear trend. The important caveat owners themselves raise is that the range display is not a capacity meter and should not be used to judge battery health.
2026AUOne Australian owner's car; variant not clearly stated, so all are listed
Vehicle-to-load works on Australian 2023 MG4s, but it is not a socket in the car: it needs MG's charge-port adaptor, a separate purchase at about A$249 at launch, and the standard adaptor caps output near 2.2 kW (10 A).
Aug 2023AUAustralian 2023 MG4 all variants
Vehicle-to-load runs through an adapter plugged into the charge port and delivers about 2.2 kW in practice. The genuinely useful part is that the car lets you set the battery percentage at which discharge stops, so you cannot accidentally strand yourself. Owners report running a fridge, freezer, lighting and networking for ten hours for around four percent of the battery. The adapter is not supplied with the car; MG's own cable is the expensive option and much cheaper third-party adapters are widely reported as working.
Jan 2025GeneralReported across MG4 trims; V2L availability by variant and market not separated in the thread all variants
Owner measurements put MG4 V2L output at the very bottom of the Australian 216-253V band, at or only marginally under the minimum, which matters only for voltage-sensitive gear.
May 2024AU+UKMG4 V2L adapters, AU and UK all variants
Practical V2L results from Australian owners: one runs a desktop computer from it with no power supply problems, another uses it to run a battery charger during grid outages, and a third charged another electric vehicle from it at 12.5 amps without issue. The output is not a clean sine wave, which in principle matters to sensitive electronics, but in practice switch-mode power supplies of the kind in computers and chargers cope with it comfortably.
May 2025AUReported by Australian owners across variants all variants
Australian owners testing V2L with third-party cables put the practical ceiling nearer 2.4 kW than the commonly quoted 2.2. One owner using a 15 amp socket cable found it worked for general loads but failed when he tried to charge a Tesla from it, apparently on a ground fault. Vehicle-to-vehicle charging is the use case most likely to fail, because the receiving car's own protection is looking for an earthing arrangement that a V2L adapter does not present.
Sep 2023AUTested by Australian owners in 2023; applies across the range all variants
This explains why owners quote wildly different V2L figures. The car's inverter decides its output limit by reading a resistor inside the adapter, so the adapter, not the car, is what caps you. The common rating is around 2.4 kW, plenty of owners report 3.6 kW without difficulty on suitably rated cabling, and some in the UK have drawn close to 7 kW. If you want more than the standard adapter gives, the component to change is the adapter, and the thing that then limits you is your cabling.
Sep 2023AU+UKAustralian and UK owner reports; the mechanism applies across the range all variants
The 2.2 kW you get in Australia is set by the standard adapter, not by the car itself. The MG4's onboard inverter is reportedly capable of around 7 kW, and owners using higher-rated third-party adapters have run loads the standard adapter could never manage. One owner's 32 A AliExpress adapter (about $40, later re-sold as a 16 A unit) ran a fridge, freezer, lights, TV, a 2.2 kW jug, a 1.8 kW frypan and a 1 kW toaster, though not all at once; another's eBay adapter boiled a 3 kW electric kettle and ran an airbed inflator at the same time without straining. With a high-power adapter the extension lead becomes the real bottleneck and must be sized for the current and kept ventilated on long runs.
Jan 2025GeneralNon-standard high-power V2L adapters and the inverter's true ~7 kW ceiling all variants
The reason the Australian V2L adapter tops out around 2.2 kW is the local plug and socket standard, which is built around 10 A rated leads and outlets. In the UK, standard 13 A plugs on 30 A ring circuits let MG supply 16 A / roughly 3.5 kW V2L adapters, so a UK owner can run something like a 3 kW kettle from a normal outlet. The car's output is the same floating AC supply in both markets; it is the national wiring rules that decide what the adapter is allowed to deliver.
Jan 2025AU+UKWhy the AU V2L limit is lower than the UK's - socket amp ratings all variants
The MG4's V2L output is a floating supply: neither of the two live conductors is bonded to earth. That is fine for double-insulated devices such as a kettle, hairdryer or TV, but any appliance that looks for a proper earth-neutral bond will throw an 'ungrounded' or earth fault and refuse to operate. One owner hit exactly this when he tried to charge a small electric UTV from V2L, using both the supplied trickle charger and the genuine MG one; another confirmed seeing the same response from chargers plugged into V2L before. Making an earth-sensitive appliance work would need a proper earthing arrangement (neutral-earth bond, earth rod and RCD protection) set up by an electrician, not just an earth stake in the ground.
Jan 2026GeneralV2L floating-earth output blocks appliances that require a protective earth all variants
At around 2.2 kW the standard V2L cannot start big or simultaneous household loads on its own. The practical approach owners take is to feed V2L into an off-grid battery or hybrid inverter and let that system supply the house: the battery covers surge and peak demand while the car slowly tops it back up. One owner charges his home off-grid battery from the car rather than powering appliances directly, and another uses the car to make up his solar system's winter deficit. As a rough guide, if daily house use is under about 24 kWh, the roughly 2 kW trickle via a battery can keep a home going.
Jan 2025GeneralWhole-home backup pattern feeding V2L into a home battery/inverter all variants
Meter your own V2L adapter before trusting it with a fridge, because one Sydney owner measured 60Hz from his official MG adapter while other Australian and New Zealand owners measured 50Hz.
May 2024AUone Australian official V2L adapter; other AU/NZ units measured 50Hz all variants
If V2L reports "Discharge finished" the instant you plug in, check the car's minimum discharge (SoC floor) setting before blaming the adapter.
Mar 2026Generalany MG4 with V2L all variants
An Australian owner who bought a 15 A V2L cable locally for about $115 found ordinary small loads ran fine — "I've tested with a radio and a few other small things, all good" — but a Tesla UMC refused to run off it and complained about a ground fault. Do not plan on using your MG4 to rescue a flat Tesla. A separate forum member reported that a generic V2L adaptor bought off eBay did not work at all, so buy a known-good adaptor rather than the cheapest listing.
date not establishedAUV2L via a Type 2 discharge adaptor feeding a 15A socket all variants
A retired West Australian Excite 51 owner used vehicle-to-load to keep his garage freezer running through a power cut lasting 37 hours. He had bought a V2L adapter from a third-party seller rather than the dealer, and sensibly tested it beforehand with a kettle rather than discovering its limits during an outage. This is the most compelling everyday case for V2L in Australia: not camping, but riding out a blackout without losing a freezer full of food.
May 2024AUWestern Australian Excite 51 owner; V2L is available across the Australian range
An Australian owner measured the V2L output at around 216 VAC. That is not a fault: the car's inverter is designed to the Chinese 220 volt nominal standard, and 216 V still falls inside Australia's 230 V minus ten percent tolerance. It is worth knowing before you run anything voltage-sensitive from it, and worth knowing if you measure it yourself and think something is wrong. Most appliances will not care, but equipment specified tightly around 230 V may run cooler, slower or less happily than it does on mains.
2026AUMeasured on an Australian car; the inverter design is common across the range all variants
An Australian owner measuring V2L output found it initially running at 216 V and 60 Hz, and then two weeks later delivering the same voltage at 50 Hz, with no acknowledgement from MG that anything had changed. Fifty hertz is correct for Australia and sixty is not, so the change was a fix rather than a fault, but it happened silently. If you rely on V2L for anything frequency-sensitive, such as a mains-synchronised clock or an older motor, it is worth actually measuring rather than assuming.
May 2025AUMeasured on one Australian car; variant not stated all variants
The setting that stops V2L flattening your car is not the same across the range. Australian owners report the Essence 64 allowing a floor as low as 20 percent state of charge, while the 51 kWh LFP car appears to require a minimum of 50 percent before it will discharge. That halves the usable energy on the smaller car relative to what its battery size alone would suggest, and it matters if you are sizing V2L against a long blackout.
Aug 2024AUReported for the Australian Essence 64 and the 51 kWh LFP car; other variants not established
Against the reports of inexpensive adapters working fine, one Australian owner's cheap import failed when he tried to run a garage door during an outage, and he warns others off substandard third-party equipment. The failure mode matters: a V2L adapter carries mains current and is the thing standing between your car's high voltage system and whatever you have plugged in. This is the wrong component on which to save forty dollars, particularly if the reason you bought it was emergency preparedness.
Aug 2024AUOne Australian owner's experience; applies to third-party adapters generally
Consistent with the car being unable to charge another EV directly, an owner with no mains power yet on a new block used V2L to charge a portable battery pack sold as an 'EV jerry can', then used that pack to charge a small electric UTV. He later found he could run both at the same time, charging the jerry can from the MG4's V2L while the jerry can was itself charging the UTV. The portable battery acts as a buffer that sidesteps the direct EV-to-EV limitation.
May 2026GeneralPortable battery buffer to indirectly charge a second EV/UTV from V2L all variants
Plan the Australian-market Long Range 77 around about 17 kWh/100km and roughly 430 km in mixed driving, budget well under 400 km if most of your driving is at highway speed, and treat the 530 km WLTP claim as unreachable.
Dec 2023AULong Range / Essence 77, Australian market
MG's data table gives the LFP 51 kWh pack as 398.7 kg and the NCM 64 kWh pack as 408.6 kg. Both are a single string of 104 cells in series, rated 327 V and 380 V respectively, both sealed to IP67. The useful conclusion for a buyer is that choosing the smaller battery buys essentially no weight saving - about ten kilograms, less than a full boot of luggage - while giving up roughly 13 kWh of energy. It also puts the pack at close to a quarter of the car's kerb weight, sitting under the floor, which is what gives the MG4 its low centre of gravity and its high seating position, and part of why the towing rating is modest.
2023General51 kWh LFP and 64 kWh NCM first-generation packs only; UK/EU document.
MG's procedure for the electricity meter indicating improperly is to start the car and confirm the value shown on the battery gauge matches the value the battery management system reports on the diagnostic tool. If the two disagree, the cluster is the suspect; if they agree, the fault is chased on through the cluster software, its wiring to the gateway, the cluster itself, the battery management module and finally the gateway. The useful part for owners is that "is my state of charge display actually telling me the truth?" turns out to be a question with a defined answer at a dealer. A technician can read what the battery module itself believes and hold it against what you are being shown, instead of everyone arguing about range estimates and driving styles.
May 2022GeneralHow MG verifies the state-of-charge gauge against the battery module; UK/EU document, procedure not market-specific. all variants
Build your own rule of thumb from winter figures and treat summer as a bonus, because long-term owners consistently report that winter motorway speeds plus cabin heating are what visibly cost range.
May 2026UK/EUall variants; the 2.9 mi/kWh figure is an AWD (XPOWER-class) car
UK owners report that LFP MG4s - the Excite 51 in Australia - give a less accurate range estimate than the NMC cars, two of them quoting roughly 6% and 11% error, so leave extra margin when planning on the 51.
Jun 2023UK/EUExcite 51 LFP notably worse; NMC variants generally praised as accurate
Expect the range estimate to relearn from scratch whenever the trip data clears, so a wild figure after a long park, a fresh charge or a software update is usually the estimator starting over, not a fault.
Aug 2023Generalall MG4 variants
Plan Excite 51 road trips off the highway figure rather than the WLTP claim: independent Australian testing measured 14.2 kWh/100km in urban driving but 17.0 kWh/100km on the highway, about 20% more.
date not establishedAUExcite 51 LFP, Australian market
For a 2023 XPOWER in Australia, plan on about 20 kWh/100 km unless most of the trip is high-speed, since owners report roughly 15 kWh/100 km in town rising to 18-24 kWh/100 km at 110 km/h.
Oct-Dec 2024AUXPOWER 64 AWD, Australian conditions (110 km/h open-road limits)
Catalogue range and real range are different numbers. For the 64 kWh car the realistic combined figure is roughly 415 km in mild conditions and about 305 km in cold ones. Split by road type it is better in town, around 535 km mild and 355 km cold, and worse on the highway at roughly 330 km mild and 255 km cold. Highway speed, not temperature, is the biggest single lever most drivers actually control.
Undated specification page, retrieved September 2026General64 kWh NMC pack only
The entry-level pack is 50.8 kWh usable out of a nominal 51, and it uses LFP chemistry rather than the nickel-based cells in the bigger packs. Realistic combined range is about 345 km in mild conditions and 250 km in cold. Around town it does better, roughly 445 km mild, and on the highway noticeably worse at about 275 km. It is rear-wheel drive with 125 kW and 250 Nm, and 0-100 km/h takes 7.7 seconds.
Undated specification page, retrieved September 2026General51 kWh LFP pack only
Counter-intuitively the biggest battery gives the best efficiency figures in the range, at about 152 Wh/km combined in mild weather against 171 for the 64 kWh car and 193 for the XPOWER. It carries 74.4 kWh usable and returns roughly 490 km combined in mild conditions, 625 km in town and 390 km on the highway. In the cold those fall to about 360, 420 and 305 km. Kerb weight is 1,826 kg, the heaviest single-motor MG4.
Undated specification page, retrieved September 2026General77 kWh NMC pack only
The XPOWER puts 320 kW and 600 Nm through all four wheels for a 3.8 second 0-100 km/h, on the same 61.7 kWh usable pack as the 64 kWh single-motor car. The cost is efficiency: about 193 Wh/km against 171, which pulls realistic combined range down to roughly 365 km mild and 275 km cold, and highway range to about 290 km mild. It is also the heaviest MG4 at 1,878 kg, and it is still limited to 6.6 kW single-phase AC charging.
Undated specification page, retrieved September 2026GeneralXPOWER dual-motor only; shares the 64 kWh pack with the single-motor car
An Australian review measured the Excite 51 at 14.0 kWh/100km in city driving and 16.2 kWh/100km on the highway, giving a practical 300 to 350 km depending on speed. The city figure is genuinely good for the class. The gap between the two numbers is the important part: highway speed costs you roughly fifteen percent more energy per kilometre, and that compounds over a long trip far more than most drivers expect.
Apr 2024AUAustralian Excite 51
The Australian line-up as of early 2024: Excite 51 at $39,990 with 50.8 kWh usable LFP and 350 km claimed; Excite 64 at $44,990 and Essence 64 at $47,990, both 61.7 kWh usable NMC and 450 km; Long Range 77 at $55,990 with 530 km and three-phase AC charging; and XPOWER at $59,990, dual motor, 320 kW combined, with claimed range dropping back to 385 km. Note that the two 64 kWh cars are mechanically identical, so the step from Excite 64 to Essence 64 buys equipment, not performance or range.
Mar 2024AUAustralian variants as listed in early 2024 all variants
Climate control dominates energy use on short journeys because the cabin is being conditioned from cold every time and there is no long drive to average it out. Australian owners measured 15 to 19 kWh/100km on 5 to 20 km suburban trips with air conditioning on auto, falling to 11 to 13 with it off. That is a difference of roughly a third. On longer runs the effect shrinks considerably, so this is specifically a short-trip lever, not general advice to drive uncomfortable.
Dec 2024AUMeasured by Australian owners on short suburban trips; applies across the range all variants
From a 1,200 km Australian road trip: sustained 110 km/h with air conditioning on returned roughly 17 kWh/100km. Another owner measured about 18 kWh/100km at 100 km/h on the freeway. These are the numbers to plan a long trip around, not the city figures in the low teens. On a 51 kWh car, 17 kWh/100km works out to roughly 290 km of usable highway range from a full charge before you start leaving margin.
Oct 2024AUMeasured by Australian owners at highway speed; applies broadly across the single-motor range all variants
A useful warning for anyone shopping. Two Essence 64 demonstrators at the same charge level showed 260 km and 333 km respectively, purely because the range estimate reflects how the car has recently been driven. A demo car that has spent its life being launched from traffic lights by prospective buyers will show a pessimistic figure that tells you nothing about the car you would take home. Do not read anything into the range display on a demonstrator, in either direction.
2024AUObserved on Australian Essence 64 demonstrators; the estimator behaves the same across variants
Wind matters more than most drivers allow for. An Australian owner recorded about 20 kWh/100km at 110 km/h into a headwind, against roughly 17 in still conditions and 16 to 17 sheltered behind other traffic. On a 51 kWh car that difference is the gap between comfortably reaching the next charger and not. If you are driving into a strong headwind, plan on a shorter leg rather than assuming your usual figure will hold.
2024AUMeasured by Australian owners at highway speed; applies across the range all variants
An Australian owner's real figure for the 51 kWh LFP car at 100 to 110 km/h in favourable conditions is 313 to 320 km. The same owner also documented the other end of the envelope, arriving home at 1 percent after a 91 km run in 13 degree weather with a 35 km/h crosswind. Both numbers are worth carrying: the first for planning, the second as a reminder of how much cold and wind can take out of a small pack.
2024AUAustralian 51 kWh LFP car at highway speeds
An Australian owner tracking ten months of charging across all types arrived at about $4.12 per 100 km. His best individual stretch was far lower, 935 km for $2.63 using solar and free grid periods, which works out at 28 cents per 100 km, but that is not representative of a year. Another owner estimated about $3.57 per 100 km on overnight grid charging. The honest number to plan a budget around is the four dollar figure, not the headline solar one.
Jul 2024AUAustralian owners charging predominantly at home; applies across the range all variants
The efficiency range Australian owners report on the 51 kWh car spans roughly 118 to 160 Wh/km depending on conditions, with the best figure achieved in suburban driving using the highest regen setting. That low end is equivalent to about 11.8 kWh/100km, considerably better than the published consumption figure, and it shows how much of an electric car's efficiency is in the driving rather than the specification. The same car on a windy highway will use nearly twice that.
Jan 2024AUAustralian 51 kWh cars
A rare case of paying more and getting less. The Excite 64 is rated at 450 km while the Essence 64 on the same battery is rated 435 km, and Australian owners attribute the difference to the Essence's larger 18 inch wheels. Bigger wheels mean more unsprung weight, more rolling resistance and worse aerodynamics. It is only a 15 km difference on paper, but it is worth knowing that the equipment upgrade carries a small efficiency penalty rather than being free.
Jul 2023AUAustralian Excite 64 versus Essence 64 on the same 64 kWh pack
Two Australian Essence 64 owners driving mostly at 100 to 110 km/h independently put real highway range around 350 km, with one covering 260 km and arriving home with 25 percent left. Both were clear that the claimed 435 km is achievable only at low speeds, not on a highway run. One noted the car misses its own range guide by at least ten percent over hours at 100 km/h, which he pointed out was considerably better than the 25 percent his previous MG missed by.
Dec 2023AUAustralian Essence 64 at highway speeds
The single-motor MG4s are not the same underneath. The 51 kWh car has a 125 kW motor, the 64 kWh cars have 150 kW, and the 77 kWh Long Range has 180 kW. The XPOWER is a different proposition again at 320 kW and 600 Nm through all four wheels. So moving up the range buys performance as well as battery, which is worth knowing when comparing a Long Range against a 64 on price alone.
Sep 2023AUAustralian variants; outputs as stated by owners in 2023 all variants
The MG4's standard steel-look wheels wear plastic aerodynamic covers (MG's 'aero covers'). Owners who thought about popping them off to expose the alloys underneath found two catches. First, the covers earn their keep aerodynamically, so taking them off trims range by an estimated 3 to 5 percent; one owner put it at roughly 236 miles falling to 230. Second, the alloy wheels hidden under the covers are a fairly plain, dated-looking design rather than something you would want on show, so you would likely want to refinish them (for example in black or gunmetal) to make the swap worthwhile.
Nov 2022GeneralAero wheel covers, range penalty and the plain alloys underneath
An Australian long-term test of the Excite 51 LFP averaged 23.1kWh/100km in mostly urban running (July 2024), so budget for real-world city range nearer 220km than the 350km WLTP figure.
Jul 2024AUExcite 51 LFP, Australian conditions
Plan on roughly 300 km between stops in a 64 kWh MG4 rather than the brochure figure: one Australian Essence 64 owner logged 17.6 kWh/100 km at 110 km/h with the aircon on over a 300 km trip in October 2023.
Oct 2023AUAustralian MG4 Essence 64
An Australian long-term Excite 51 used for the school run, grocery shopping and city commuting averaged 23.1 kWh/100km, so budget well above the WLTP consumption figure for mostly short suburban driving.
Jul 2024AUExcite 51 LFP, Australian market, short-trip suburban use
An owner whose car had reliably run down to about 7% found low-power/turtle mode cutting in anywhere between 7% and 17% after a dealership software session in November 2024, with 20+ miles of indicated range still showing. Two months later the dealer told him there was a bug in the Accumulated Total usage statistics affecting the car's ability to judge its own range, and advised resetting those totals then charging to 100%. He never posted back to say whether it worked, so treat this as a dealer's hypothesis rather than a proven fix — but if your turtle threshold moves after a service, it is worth asking them to look at the accumulated totals before accepting battery degradation as the answer. Several other posters said they had never seen turtle mode at all.
date not establishedUK/EUMG4s that have recently had dealer software work; symptom is reduced power well above the usual reserve.
A long-term Australian Essence 64 owner logged their energy as 51% home solar, 21% home grid, 23% public DC and 6% destination — yet public DC accounted for 71% of what they spent. Home charging came to 85c/100 km against an all-in average of $3.61/100 km. The lesson is that a few road trips dominate an EV's running cost far more than daily driving does.
date not establishedAUOwner with home solar plus occasional interstate trips; overall 17.5 kWh/100km
An experienced Australian owner's advice for longer trips is to calculate consumption himself and add a twenty percent safety margin, rather than relying on a planning app alone. His specific objection is that the apps will happily route you to a charger that is out of service. The margin covers the things the app does not know about: headwinds, a full car, a hot day with the air conditioning working, and the detour to the next site when the first one is broken or occupied.
May 2024AUAdvice from a Western Australian Excite 51 owner; applies to any variant all variants
Real-world range on the 64 kWh car can be far closer to the claim than owners expect. An Australian Essence 64 owner covered 322 km taking the battery from full down to 25 percent, which works out to roughly 430 km from full to flat, only about 5 km short of the 435 km claimed figure. The caveat is that this was mixed real driving rather than a sustained high-speed run, and the last 25 percent is extrapolated rather than driven. Sustained highway speed will pull it well below this.
Oct 2023AUAustralian Essence 64 RWD
The dual-motor XPOWER measured 15.8 kWh/100km in Australian city driving against 14.0 for the Excite 51, which is a smaller penalty than its 320 kW output suggests. Around town you are rarely using the performance, and the extra motor mostly sits idle. The real cost of the XPOWER's performance shows up at sustained highway speed and under enthusiastic driving, not in urban running.
Apr 2024AUAustralian XPOWER, city driving only
An Australian owner covering 4,000 km in six weeks reported spending $90.30 on electricity, which works out at roughly two cents per kilometre. That is the number worth quoting to anyone comparing against petrol, and it is achievable because the charging is done at home on cheap or solar-supported rates rather than on public DC. Public fast charging changes the arithmetic substantially, and an owner doing most of their charging on the road should not expect anything close to it.
2026AUOne Australian owner charging predominantly at home; variant not clearly stated all variants
Australian owners describe the Melbourne to Sydney run as feasible but not relaxed, with the stretch of the Hume between Kilmore and Albury singled out as the section where charging convenience falls away. Owners also consistently rate Tesla's Supercharger network above the alternatives for reliability, which matters more than raw speed when you are planning a long drive with limited alternatives. Plan that leg deliberately rather than assuming coverage will be as good as it is around the cities.
2026AUAustralian east coast route experience; applies to any variant, more acutely to the smaller packs
An Australian owner found consumption improving from about 200 Wh/km to 175 Wh/km after disabling battery heating. On a car in a mild Australian climate the pack conditioning is doing comparatively little for you while still drawing energy, so the trade is different from a cold-climate market. The cost is slower DC charging when the pack is cold, so it suits an owner who charges mostly at home and rarely needs peak fast-charging performance.
Sep 2023AUOne Australian owner's car in 2023; variant not clearly stated all variants
An Australian owner totalling up two years and 43,000 km estimated under $2,000 spent on charging, working from around 15 kWh/100km with a lot of solar input, a good deal of slow home charging, and public fast charging at around 50 cents a kilowatt hour on longer trips. That is the whole-of-ownership energy figure most people want and rarely see. His own caution is worth repeating: charging is not the whole running cost, and on this car the tyres were the larger bill.
Jan 2025AUAustralian Essence 64 over two years and 43,000 km
Cabin heating on every Australian-delivered MG4 from 2022 to 2025 uses a resistive PTC element rather than a heat pump, drawing roughly twice the energy for the same warmth, so budget extra range on cold mornings.
Sep-Nov 2022AU+UKall Australian-delivered MG4 2022-2025; EU Luxury trims differ
The well-known complaint that you have to set 28 or 29 degrees to feel warm, or that 23 degrees on auto blows cold air, is a miscalibrated climate controller and is corrected by reflashing that module with the dealer's tool. A useful self-check from a long-standing member: if 21 degrees sits roughly in the middle of the available temperature range, your car has already had the correction; if the range is skewed so that comfortable is right at the top, it has not. One owner asked for the climate update at the same visit as a lane-keep campaign and the dealer did both, so it is worth naming when you book.
May 2026GeneralCabin temperature reading several degrees cold; which update actually fixes it
MG's own schematic of the heat-pump air-conditioning system shows a high-pressure PTC element sitting in the same circuit as the interior condenser. In mild cold the compressor pumps heat in from outside air through a front-mounted external heat exchanger, which is far cheaper in energy than resistance heating; when that is not enough - genuinely cold air, or a hard demist demand - the PTC element heats directly and consumption jumps. That is why a heat-pump car still shows big winter energy use at times: the heat pump reduces how often the resistive heater has to work, it does not remove it. Cars built without the heat pump, including the 51 kWh Excite, rely on the PTC alone, which is why the cold-weather range hit is worse on those.
2023GeneralFirst-generation MG4 climate system as described in MG's UK/EU workshop documentation; heat-pump fitment varies by market and trim. all variants
MG places the external heat exchanger - the radiator-like part the heat pump uses to trade heat with outside air - directly behind the front bumper beam. Depending on which way the system is running it acts as either a condenser or an evaporator, so it matters for both cabin heating and cooling. Two practical consequences. A front-end impact that looks cosmetic can damage or leak this exchanger, so if heating or cooling performance changes after a low-speed knock, say so when the car is assessed. And anything that blocks airflow through the front of the car - heavy bug screens, packed leaves, a badly fitted aftermarket bumper part - works against it.
2023GeneralHeat-pump equipped first-generation MG4; UK/EU document. all variants
MG states that the car comes as standard with a high-voltage electric heater and that the heat pump system is optional. The refrigerant layout drawing for the heat pump is headed "Non-UK" in MG's own training material — first-party confirmation of what owners worked out on forums, that the heat pump was a market decision and UK-market cars went without one. There is also a concrete way to tell the two apart: MG specifies about 580 g of R1234yf refrigerant for a car without a heat pump and about 660 g for a car with one, so the fill weight on the under-bonnet label or in the workshop data identifies the system. The heat-pump cars also carry extra hardware — a gas-liquid separator, a valve integration module and bypass and heating expansion valves — that a non-heat-pump car simply does not have.
2023UK/EUUK/EU training document; the 'Non-UK' labelling is direct evidence about UK build only, and Australian specification must be checked separately. all variants
On a car with the heat pump, MG's control strategy is heat-pump-first: it heats with the heat pump wherever that meets the demand and brings the high-voltage resistive PTC heater in as an assist when conditions require, specifically to protect range. The PTC itself is commanded by the air-conditioning controller over the LIN bus, and MG states its working state is not shown on the climate display. So there is no indicator anywhere telling you whether the car is heating you cheaply with the heat pump or expensively with a resistive element, which is why winter consumption can jump sharply with nothing visibly changing on screen. On a car without the heat pump, all cabin heat comes from that resistive element every time.
2023GeneralControl strategy from MG's UK/EU training material; the display behaviour is a vehicle characteristic, not a market one. all variants
MG documents fan control in two states. With the high-voltage system live, the fan runs if the drive-unit coolant reaches 55 degrees C or the air-conditioning pressure reaches 0.22 MPa, and it has eight speeds set by coolant temperature, ambient temperature, refrigerant pressure and road speed. With the high-voltage system switched off — that is, after you have parked and locked the car — MG still commands the fan on when the drive-unit coolant is at or above 63 degrees C, with timing given as 120 seconds when the ambient temperature is 5 degrees or above and 60 seconds when it is below. So a whirring from the front of a car you have just parked after a fast run or a DC charging session is the system dumping residual heat, not a fault and not a sign of a parasitic drain.
2023GeneralFan control thresholds from MG's UK/EU training material; these are vehicle control parameters, not market settings. all variants
MG's cause list for an air conditioning smell is short and specific: a dirty or mouldy cabin filter, a dirty or mouldy air intake grille, a damaged fresh-air/recirculation flap or its actuator, and dirty or mouldy ductwork. It is worked in that order. The intake grille is the slotted panel at the base of the windscreen that the car breathes through, and it is where leaves, blossom and general muck collect and rot - which is why the smell can come straight back after a new filter if nobody cleaned the grille. The flap actuator matters because a recirculation flap stuck closed leaves the ducts damp. Notably, MG's list does not send you straight to an expensive evaporator clean, which is often the first thing offered commercially.
May 2022GeneralMG4 climate system odour causes; source is a UK/EU repair-information release. all variants
Read across MG's climate chapter and the same cheap part keeps turning up. A dirty or blocked cabin filter is a listed cause of insufficient cooling, of insufficient heating, of insufficient air output, and of a peculiar smell. That makes the filter the single most likely explanation for a climate system that feels generally past its best, and it is the one item on those lists an owner can have changed for very little. If your MG4's vents feel weak, or it is slow to warm or cool, changing the filter is a rational first move before paying for any diagnosis - and MG's own labour time for the job is about a quarter of an hour.
May 2022GeneralMG4 HVAC symptom causes; source is a UK/EU repair-information release. all variants
MG's diagnosis for insufficient heating opens by checking the coolant for leakage and topping it up, and finishes with the heater water pipe and the heater core - the small radiator in the dashboard that the cabin air passes over. In between it checks the blower and its speed control, the temperature blend flap and its actuator, and the cabin filter. The shape of that list tells you something useful about the car: the MG4 does not heat the cabin with a bare electric element in the airstream, it heats coolant and then pumps that coolant to a heater core. So low coolant, a leak, or a blocked heater pipe genuinely can leave you with a car that blows cool air, and a blend flap that has stopped moving will do the same. If your heater has gone weak, those are the causes MG expects, not a failed heat pump.
May 2022GeneralMG4 cabin heating fault causes; source is a UK/EU repair-information release. all variants
The air conditioning precautions state the refrigerant as HFC-134a, R134a - not the R1234yf that many newer cars use, so a workshop that assumes otherwise is about to get it wrong. More usefully for anyone chasing a noise, MG lists incorrect refrigerant level or excessive refrigerant as a cause of noise or vibration in the air conditioning system, in the same breath as the wrong fluid type in any accessory system. So a hum, buzz or vibration that started after a cheap regas is a legitimate thing to point back at the regas. The section also notes that refrigerant lines touching a metal panel will transmit noise into the cabin and must be isolated, which is another quiet source that has nothing to do with the compressor being faulty.
2022UK/EUMG4 EV first-generation; UK/EU document, refrigerant specification should be verified against the Australian car's label all variants
The MG4's cooling fan is designed to keep running for a while after you switch off and walk away, which is normal. A fan that runs continuously is different, and MG treats it as a fault with a very short cause list: the fan's own wiring and connectors, or the fan assembly itself. Nothing else in the cooling system is on the list. That is useful because it separates two things owners confuse: run-on after shutdown is the car doing its job, while a fan that will not stop is a wiring or fan fault and nothing to do with coolant, the battery or the air conditioning.
2022GeneralDistinguishes designed cooling-fan run-on from MG's "Cooling Fan Running All the Time" fault
Owners assume an electric car heats the cabin with an electric element and nothing else, so a weak heater must be an electrical or software problem. MG's procedure for insufficient heating starts somewhere else entirely: check the coolant for leakage and top it up. Only then does it work through the blower, the temperature blend actuator and its flap, a blocked cabin filter, and finally the electric heater itself. The MG4 moves cabin heat around in liquid, so a low coolant level or a leak shows up as a car that blows lukewarm air long before it shows up as a warning light.
2022GeneralCabin heating output complaints on first-generation MG4s, heat-pump and non-heat-pump alike all variants
"Air Conditioning System Peculiar Smell" is a named MG4 symptom with a four-step procedure. First the cabin filter, which MG says to rinse or replace if it is dirty or musty. Second - and this is the one owners miss - the air inlet grille, the vented scuttle under the windscreen where leaves and grit collect, which MG also says to rinse or replace. Third the fresh/recirculated air flap and its actuator, because a flap stuck on recirculate keeps damp air in the system. Fourth the air conditioning pipework itself. Two of the four are accessible with nothing more than water and time.
2022GeneralSmell from the vents on a first-generation MG4 all variants
Across the heating and ventilation symptom tables the same part keeps appearing: the cabin (A/C) filter is a listed possible cause of weak cooling, weak heating, not enough air out of the vents, and a bad smell. It is the only part common to all four. Given that MG's own labour time for changing it is minutes, and that MG tells dealers to check it every 5,000 km in dusty or sandy conditions rather than waiting for the service interval, a blocked filter is the first thing worth eliminating before booking any climate diagnosis - especially on a car that has never had one changed.
2022GeneralMG4 climate complaints of any kind; filter part numbers and prices vary by market all variants
MG's removal procedure for the ambient temperature sensor requires taking the front bumper off to reach it, which tells you where the car gets the outside temperature it shows you and, more importantly, the figure its climate logic works from. A sensor sitting in the airflow behind the bumper skin reads high when the car has been standing in the sun or crawling in traffic over hot tarmac, and only settles once you are moving. That is worth knowing if you have run into the MG4's habit of refusing to produce real heat when it thinks it is warm outside: the reading behind that decision is a physical sensor in a heat-prone spot, not a cabin thermometer. It also means a front-end knock or a bumper refitted carelessly can leave the reading wrong, and there is no way to inspect the sensor without pulling the bumper.
Jul 2023GeneralMG4 EV, July 2023 workshop manual, ambient temperature sensor (manual p278) all variants
The manual's odour-removal guide names where the smell comes from - contamination or microbial growth in the cabin filter, on the air conditioning box housing, on the evaporator and in the air ducts - and then, unusually, gives the cleaning fluid. MG's suggestion is a solution of about 40 percent vinegar to 60 percent water, or a suitable proprietary cleaner, used to clean the housing, the evaporator and the ducts after the filter has been replaced. That is a cheap, specific and non-proprietary answer to a complaint that dealers often deal with by selling a treatment, and it confirms that replacing the filter alone is only the first of four steps. It sits alongside the well-known owner habit of running the fan without cooling for a few minutes before parking to dry the evaporator out in the first place.
Jul 2023GeneralMG4 EV, first-generation, A/C odour removal all variants
There is no separate mirror-heating button on the MG4. The heating element sits behind each mirror glass and is wired to the same relay that heats the rear window, so pressing the rear demist on the climate panel is what clears frost or mist off the mirrors, and it is the only way to do it. Two practical consequences: on a frosty morning the rear demist is the button that does double duty, and if your rear window heating has failed the mirrors will stop clearing too, which points the diagnosis at the demist circuit rather than at the mirrors themselves.
Jul 2023GeneralHeated exterior mirrors, first-generation MG4. all variants
The MG4's heating and ventilation dampers - the flaps that decide whether air goes to the screen, the face vents or the footwells - can be told to relearn their own travel. MG's stated purpose for the routine is to eliminate windscreen fogging caused by air leaking past a damper because of a manufacturing or assembly error. It is required after any actuator with a feedback signal is replaced, after the air conditioning box is replaced, and any time damper positions were moved while something was being taken apart, which means after most dashboard work. So if your car mists its screen up when it should not, or air seems to reach the glass when you have not asked for it, there is a factory calibration for that before anyone starts quoting for parts. It is a diagnostic-tool routine, not something in the touchscreen menus.
Jul 2023GeneralAll first-generation MG4 with the standard HVAC unit; UK/EU manual but a vehicle-level function.
A question that comes round every holiday season. The MG4's headlights use a flat beam pattern, which means the cut-off is the same whichever side of the road you are driving on, so there is nothing to adjust and no stickers to buy before crossing the Channel. An owner asked MG UK directly and had it confirmed in writing. It is one of the few areas where the MG4 makes life simpler than the cars it competes with, and it saves both the cost of a set of deflectors and the annoyance of trying to place them correctly.
Apr 2026UK/EUMG4 as sold with the standard flat-beam headlights. all variants
UK owners of the early 51 kWh LFP car report it can silently cap power at around 32-40% state of charge in sub-zero weather, so check the car's software is current rather than assuming the limit is normal.
Dec 2022UK/EUreported on the 51 kWh LFP (Excite 51 equivalent); LFP is the more cold-sensitive chemistry all variants
Do not treat the car's battery heating as fast-charge preconditioning - UK owners report it arms when the pack itself is at or below 10C and only warms it to roughly 17-20C, enough to dodge cold-gate and no more.
Mar 2024UK/EUall MG4 variants; the wait time differs by chemistry (LFP needs roughly double the NMC warm-up)
Run the fan on speed 1 for a while before selecting Lo, because owners report that setting the temperature below about 18C otherwise sends the blowers to full and leaves the fan control unresponsive.
Nov 2022AUMG4 2022–2025; most noticeable in cold weather all variants
Owners report losing cabin cooling entirely once ambient goes above about 30 C, getting only hot outside air in every mode. One 2023 Trophy needed a complete compressor replacement and the owner said it took "3+ months to get MG to agree warranty replacement", with the car back in early July 2025; a second owner had a compressor-related failure needing dealer work. Before assuming the compressor, a member suggests checking fuse F88 in the fuse box under the bonnet, and one dealer tried to upsell a regas. The thread does not establish that a noisy compressor reliably precedes failure — get any unusual noise put in writing anyway.
Jul 2025GeneralIntermittent at first — cold in the morning, hot air by afternoon — before failing completely all variants
A heat pump was never offered on the UK MG4, not even as a paid option, while equivalent EU cars from the Luxury trim upward shipped with one as standard and lower EU trims got the same resistive PTC heater as the UK. Ireland is named as an EU exception that missed out. This matters for winter range: a UK Trophy and an EU Luxury are not the same car thermally, so don't apply EU winter consumption figures to a UK example.
date not establishedUK/EU2022-2025 MG4; check what your own market actually shipped before assuming a heat pump
Water left in the charge port after a session freezes below zero and locks the flap closed; the flap has an electronic lock but no electronic opener, so there is nothing to press. Owners free it with warm water or a hairdryer and firm pushes, then prevent a repeat with silicone spray or automotive red grease on the seal — never Vaseline, which attacks the rubber. If it is truly stuck, the painted cover prises off at the top-right corner with a trim tool and a T45 Torx bit rotates the latch pin manually.
Nov 2024UK/EUSub-zero mornings after charging in the wet; independent of whether you lubricated beforehand all variants
Australian owners establish that cabin heating only engages when the outside temperature is below roughly 22 degrees, as an energy-saving measure. On a mild day you can set the temperature high and get nothing warm, which looks exactly like a broken heater. Related and equally confusing: the air conditioning compressor runs during heating to dehumidify and clear the windows, so hearing the compressor while asking for heat is normal and is not the car cooling against itself.
2025AUReported on Australian cars; applies across the range all variants
Air conditioning systems develop mould in the evaporator when they are shut down wet, and electric cars are no exception. Owners run the fan without cooling for a few minutes before arriving, which dries the evaporator. One Australian owner also observed the car running its fan automatically after being locked through the app, which appears to be doing the same job. If your vents smell musty when you first switch on, this is the cause and it is much easier to prevent than to fix.
Jan 2024AUAustralian owners; applies across the range all variants
One Australian owner review reports the cabin heater intermittently blowing air colder than the outside temperature, air conditioning that feels weak, and a front demister that always starts at full fan speed.
date not establishedAUAustralian-market MG4 all variants
On UK and European cars, early MG4 infotainment software scaled the climate temperature control too high — one owner's detailed report puts it 4-5 degrees out, so the cabin ran cooler than the number set.
Mar 2025UK/EU2023 MG4 on pre-R63 infotainment software all variants
An owner traced a recurring musty smell lasting seconds to a minute at each cold start to the MG4's intake arrangement — with the system off, the external air vent closes, so the evaporator sits sealed and damp instead of drying out. A new cabin filter only helped temporarily, returning after the car sat for a few days. Owners' countermeasures are an evaporator sanitiser used with recirculation on, a charcoal cabin filter, and running the heater hot occasionally to dry the core.
date not establishedGeneralAny MG4; most noticeable on the first A/C use after the car has been parked several days in warm weather. all variants
The MG4's heat pump is not a universal fitment; it is recorded as varying by country rather than being standard across the range. This matters because a car without one heats the cabin resistively, which is far hungrier, and it is part of why the same model's cold-weather range figure sits roughly a quarter below its mild-weather figure. If you regularly drive in the cold, heated seats and a heated steering wheel cost far less range than heating the whole cabin.
Undated specification page, retrieved September 2026GeneralFitment stated to vary by country; the Australian position is not established by this source, so all variants are listed
Where the bigger packs are listed as having heat pump fitment that varies by country, the 51 kWh car is listed as simply not having one. It heats the cabin resistively, straight off the traction battery. That is the main reason its cold-weather combined range drops from about 345 km to 250 km, a loss of nearly a third. Heated seats and a heated steering wheel, where fitted, cost far less range than cabin heat.
Undated specification page, retrieved September 2026General51 kWh LFP pack; the larger packs are listed as varying by country rather than absent
On European MG4s fitted with a heat pump, owners describe a consistent offset of around five degrees between the set temperature and what the cabin actually reaches, meaning a setting of 29 or 30 is needed to get a cabin around 24. Owners treat it as a calibration bug rather than a fault in the heating hardware. If your car reads five degrees cooler than you asked for and is otherwise heating normally, this is likely what you are seeing.
2025UK/EUEuropean cars fitted with a heat pump; Australian applicability not established, so all variants are listed
An Australian owner whose heater did nothing on a new car suspected the heater fuse had been removed during transport, a practice European MG forums describe as deliberate to stop the heater drawing down the battery while the car sits in transit and storage. Before accepting a diagnosis of a failed heater on a newly delivered car, it is worth having the fuse checked. It is the cheapest possible explanation and it fits the symptom exactly: everything else works, and the heat simply is not there.
Sep 2023AUReported on an Australian delivery in 2023, referencing European practice; variant not stated all variants
An XPOWER owner found the heating would only actually warm the cabin if the set temperature was around six degrees above the outside temperature, which makes the climate control feel broken in cold weather. This points to the car needing an updated climate-control module rather than a fault you can fix from the screen. If your heating behaves this way, it is worth raising with the dealer as a climate module software update rather than assuming that is just how it works. The car does know the real interior temperature, so the information is there for them to work with.
2026GeneralReported on a 2023 XPOWER; not confirmed on other variants
Expect to switch Lane Keep Assist and the speed-limit warning off again at the start of every drive, because there is no permanent off and MG UK says the re-arm is a deliberate NCAP requirement.
Jan 2023 - Apr 2024UK/EUall 2023 MG4
Australian reviewers corroborate the complaint: CarsGuide's 2023 launch review found the lane keeping assist particularly intrusive and turned it off via the menu, listing safety-system calibration as a formal dislike.
Aug 2023 – Jul 2024AUAustralian-delivered MG4, all trims
Asked about the reset in 2023, MG UK said it is tied to the car's NCAP safety declarations and that the function will be set back to on once the engine or ignition is turned off, so do not expect a dealer to disable it permanently.
Jan 2023AU+UKall 2023 MG4; MG UK statement, but the behaviour is reported in Australia too
Lane-keep assist on the MG4 could steer the car toward oncoming traffic when passing on narrow roads, according to Which? testing in the UK, and MG Motor UK issued an ADAS software update in February 2025.
Feb 2025AU+UKSC077UK MG4s primarily; the underlying LKA behaviour is reported by Australian owners as well all variants
On MG4s running software from around December 2022 onward, lane keep assist switches itself back on at every drive cycle, so turn it off only once the car is in Ready and expect to repeat it every drive.
Jan 2023AU+UKall MG4 variants with post-Dec-2022 software; confirmed on AU cars by local reviewers
Switch Lane Keep Assist off before every drive, and only after the screens have finished booting and you have pressed the brake to reach READY - it re-arms at every start and an early tap does not stick.
Apr 2024 - Mar 2025AU+UKall MG4 variants and markets, incl. 2023 Australian cars
In a February 2024 thread around nine owners described the system misbehaving: switching to main beam at 20 mph despite the manual's 25 mph minimum, reacting to house lights, road-sign reflections and tail lights a mile or more ahead, and only seeing an oncoming car once it is fully round the bend — by which time that driver has been dazzled. Most of them simply turned the feature off and did the lights themselves; a software update reportedly made it behave for a couple of owners, and four or five others said theirs worked acceptably, so it is not universal.
date not establishedGeneralMG4s with automatic high beam assist enabled; worst on unlit rural and bendy roads. all variants
Lane keep assist re-arms every time you bring the car to Ready, so it is off for one drive only. The part owners get wrong is the order of operations. If you reach for the touchscreen before the car is in Ready, the toggle appears to work but does not stick. The reliable sequence is to get in, let the screens finish booting, press the brake pedal to bring the car to Ready, and only then turn the setting off. Done that way it stays off for the rest of that drive.
Apr 2024 - Mar 2025GeneralReported across MG4 trims; variant not distinguished by the owners reporting it all variants
A consumer group collected reports from MG4 owners describing the lane keeping system making abrupt steering interventions, including pulling towards the verge and steering towards adjacent vehicles, with some owners returning their cars. MG's response was that it was finalising a software enhancement requiring regulatory approval, and it stated explicitly that the upgrade was not classed as safety related. MG had previously said it had received no safety-related reports, despite owners saying they had complained directly.
Jul 2024UK/EUUK cars and UK software; applicability to Australian variants not established, so all variants are listed
Australian owners describe the same behaviour that generated UK headlines: the steering tugging towards oncoming traffic on country roads, one owner describing a genuine fright with an oncoming semi, and the system reacting badly to unclear or absent markings and to wet conditions. This is the specific scenario worth knowing about, because it is the opposite of what a lane keeping system is supposed to do and it happens where the consequences are worst. Several Australian owners turn it off for rural driving as a matter of routine.
2024AUReported by Australian owners on rural roads; applies across variants fitted with MG Pilot all variants
Owners frustrated that lane keep assist re-arms every drive should know the reason: safety rating protocols require driver assistance systems to default to active at every start, so a manufacturer that let the setting persist would lose points. This is why no software update will ever make it stay off, and why the only options are to turn it off each drive or to set it to alert only where that is retained. It is a regulatory constraint rather than an oversight, which is worth knowing before spending time hunting for a hidden setting.
Aug 2023GeneralApplies to any MG4 fitted with MG Pilot, in any market with equivalent rating protocols all variants
The front view camera module has to be re-learned after windscreen replacement or any work that involves removing and refitting it, according to MG's programming and configuration manual. The learning is not a workshop bench procedure: the manual says the car must be driven for a period on a long straight road with neatly arranged markers on both sides, such as power poles, at a speed of no less than 40 km/h and no more than 60 km/h, with the time taken depending on road conditions and how many reference objects there are. The manual adds that once calibration reaches 100 percent the car should be powered off and left for one minute without opening a door or window or touching the infotainment, because any of those wakes the vehicle bus, before being powered on again.
Jul 2023GeneralDocumented for the MG4 generally; the forward camera and radar are fitted across the range, so all variants are listed
Owners who had been turning lane-keep assist off because it made abrupt, unwanted steering inputs report that a 2025 lane-keep software update, applied at the dealer as a service campaign, made both lane-keep and traffic-jam assist far better behaved. Several now leave lane-keep on full-time, describing only an occasional slight tug at the wheel, a beep, and a red lane-line warning when you drift toward the markings, rather than the earlier behaviour they felt could steer them off the road. If your car's lane-keep is still twitchy, it's worth asking the dealer whether this update has been applied.
Mar 2025UK/EU2025 lane-keep/TJA update makes LKA usable; owners now leave it on (relates to the AU Aug-2024 update and the LKA campaign already logged) all variants
The MG4 uses electric power steering with a torque sensor in the steering gear and a steering angle sensor in the column, and the control module works out how much assistance to give from torque, steering angle, road speed and its own calculated internal temperature. Three documented behaviours explain how the car feels. It gives more assistance at parking speeds and deliberately less at high speed for road feel and directional stability. It has an "end stop protection" function that reduces assistance just before the rack reaches full travel, to avoid noise, overheating and mechanical damage — so the last part of full lock feels heavier by design. And it has thermal protection: if the module calculates that the system is getting hot, it reduces the current to the steering motor, meaning the steering can go noticeably heavy after repeated full-lock manoeuvres such as a tight multi-storey car park or repeated parallel parking. There is also an "active self-centring" function that controls the speed at which the wheel returns when you take your hands off. If the system faults, assistance is cancelled automatically and the steering warning lamp lights.
2023GeneralEPS control description from MG's UK/EU training material; describes the steering system fitted to all variants.
The blind spot and rear cross traffic warnings come from two corner radars mounted behind the rear bumper. MG's manual requires those radars to be recalibrated not only when a radar is replaced, but whenever anything moves them - which explicitly includes removing and refitting the rear bumper, and also any four-wheel alignment that changes the car's driving axis. The point of the calibration is to work out how far the radar's aim differs from the direction the car actually travels and compensate for it in software. That connects two things owners deal with separately: MG's own fix for the boot water leak needs the rear bumper off, and so does most rear-end accident repair. If the calibration is skipped, the radars are looking slightly the wrong way and the warnings can become unreliable without any warning light to tell you.
Jul 2023GeneralCars fitted with blind spot monitoring / rear cross traffic alert; triggered by rear bumper removal or wheel alignment
Owners who think the MG4's automatic high beam does nothing are often driving below the speed at which it is allowed to operate. MG gates it on three conditions at once: the lights must be in AUTO with the dipped beams already on automatically, the car must be doing more than 40 km/h, and the rear fog lamp must be off. Slow below 40 km/h and it reverts to dipped beam on its own. The forward camera behind the windscreen makes the call, and MG lists a long set of situations where it simply cannot: fog, heavy rain or snow, wet reflective road surfaces, reflective signs beside the road, weak street lighting among buildings, steep crests and dips, winding and mountain roads, and a dirty or obstructed windscreen. Combined with the limit of three activations per drive, that is most of the reason the feature seems unreliable.
Jul 2023GeneralIntelligent high beam on cars equipped with it; first-generation MG4. all variants
MG lists four ordered steps whenever the upper steering column, steering gear sleeve, inner or outer tie rod, or the steering gear itself is replaced: erase the currently learned end protection value, reset the stored steering angle zero, calibrate a new steering wheel angle zero position, and then relearn the end protection value of the rack. Each is done with the wheel held centred and the car woken into Ready. If the steering module itself is renewed, a longer six-step replacement routine applies instead. The reason this matters to an owner is that the car's idea of straight ahead feeds the stability control and the lane assistance, and the end protection value is what stops the rack slamming into its own limits at full lock. A crash repair, a worn tie-rod replacement or a steering column job finished without these steps can leave a car that tracks oddly, has assistance behaving strangely, or feels wrong at full lock - with nothing obviously broken.
Jul 2023GeneralAny MG4 steering component replacement; requirement is a property of the car, documented in the UK/EU manual. all variants
If your car has Traffic Jam Assist, two owners suggest trying it on open freeway, where it holds its lane well, and falling back to plain ACC or to manual driving in town, where it fights the driver more.
Dec 2024AU+UKtrims with TJA (MG Pilot full suite) all variants
If your Lane Keep Assist feels aggressive, note that MG's softer calibration (campaign SC077) reached UK and European cars in late January 2025 and, as of the last public report in August 2025, had not been released in Australia.
Feb 2025AU+UKSC077all 2023 MG4; SC077 is UK-only, Australian calibration delayed
On UK and European cars the SC077 update softens how hard lane-keep assist intervenes but does not stop the system re-arming itself every time you get back in, so expect to keep switching it off.
Mar 2025UK/EUSC077AS-25-006EU MG4 post-SC077 all variants
Rather than fighting the master switch, which re-arms at every ignition, UK and EU owners cut the nuisance by setting lane assist to Alert mode with Low sensitivity and the audible warning off, so crossing a line only vibrates the wheel.
Dec 2024UK/EUSC077all 2023 MG4 variants
SC077 is a UK and EU service campaign with no Australian equivalent released, and MG Australia's response was that headquarters are refining the update for Australia, so verify with your dealer rather than assume.
Feb 2025 (comments to Oct 2025)AU+UKSC077Australian-delivered MG4, all variants
An Australian reviewer found the lane centering would occasionally drift towards the edge of the lane, and sometimes turn itself off entirely without warning. The second part is the safety-relevant one: a system that quietly stops assisting is more dangerous than one that never assisted, because the driver's expectation has not changed. Treat the MG4's lane centering as a convenience that may stop at any moment, not as something to rely on.
Apr 2024AUAustralian cars as tested in 2024; applies across variants fitted with MG Pilot all variants
Owners who accept that lane keep re-arms every drive have looked for a faster way to turn it off than going through the touchscreen, and the obvious idea is remapping one of the steering wheel buttons. It is not possible: the buttons cannot be reprogrammed, and there is no shortcut. The touchscreen route, after pressing the brake to bring the car to Ready, remains the only way. Knowing this saves you hunting for a setting that does not exist.
Oct 2024AUReported on Australian cars; applies across the range all variants
This is the practical workaround for the lane keep assist that re-arms every journey. Owners report that while the on/off state resets each time you put the car in Ready, setting the system to alert only is retained. You still get the warning, which is what keeps the safety rating intact, but the car stops physically tugging at the wheel. For anyone who finds the steering interventions unwelcome on country roads, this is the setting to change rather than fighting the toggle every drive.
Sep 2023AUReported on Australian cars; applies across variants fitted with MG Pilot all variants
MG's programming and configuration manual lists four wheel alignment, alongside radar or bracket replacement and front anti-collision beam work, as an operation after which the front detection radar self-learning must be performed. The manual explains the reason: calibration exists to determine the deviation between the radar antenna axis and the vehicle driving axis, horizontally and vertically, and to compensate for it, and an alignment changes the driving axis. The same requirement is listed for the rear driver assist modules on both sides when the four wheel alignment changes the driving axis.
Jul 2023GeneralDocumented for the MG4 generally; rear driver assist modules are not fitted to every trim, but the front radar requirement applies across the range
Because the lane systems reset themselves on every drive, owners end up turning them off constantly, and the settings pages are several taps deep. Swiping down from the top right of the main infotainment screen - not while phone projection is displayed - brings up a quick menu with toggles for lane keep and emergency lane keep, which is much faster. It is worth knowing because it is a daily job rather than a one-off, and because one software release changed which tab the car settings page opens on, adding yet another press for people using the long route.
Apr 2026GeneralFastest way to disable lane keep and emergency lane keep each drive all variants
Not every reviewer found the lane keeping objectionable: Chasing Cars' Australian review of the Long Range Essence 77 judged it particularly well tuned, keeping the car centred in its lane as it should.
date not establishedAUMG4 Long Range Essence 77 (AU)
If your centre screen is set to switch automatically between light and dark, set it to one or the other manually - UK Trophy owners report Lane Keep Assist turning itself back on mid-drive when the theme flips.
Nov 2023UK/EUreported on MG4 Trophy (UK); equivalent to AU Essence
One UK owner had his cracked windscreen replaced by a glass firm, then had the dealer apply the lane-keep software update, which he reported had resolved the serious LKA problem. Days later Autoglass insisted on coming out to recalibrate the forward camera anyway — after which, in his words, it 'reverted to the same condition that it was in the last time they came', and the car had to go back to the dealer for yet another recalibration before lane keep behaved again. This is a single report, so treat it as a reason to re-check lane keep after any third-party recalibration and to tell the fitter you have had an ADAS software fix, not as an established rule.
date not establishedUK/EUAny MG4 with the windscreen-mounted MG Pilot camera that has already had an ADAS software update. all variants
An observation from Australian owners worth carrying into any car purchase: local launch reviews of the MG4 did not evaluate lane keep assist, radar cruise or emergency braking in any depth, which is precisely where the car's real weaknesses turned out to be. The owner community identified the phantom braking and lane keep behaviour months before it was widely covered. When you are researching any car, weight owner forums heavily on driver assistance behaviour, because launch reviews rarely spend enough time with a car to surface it.
Aug 2023AUAustralian launch coverage in 2023; applies across the range all variants
An Australian Essence 64 owner reported that switching lane keep assist off in the MG Pilot menu stopped the warning chime, but the car kept applying steering corrections regardless. In his words, turning it off did not turn it off. If you rely on that toggle to stop the car steering for you, verify on your own vehicle that the steering input actually stops, rather than assuming silence means the system is disengaged. Other owners have had better results setting the system to alert only rather than off.
Dec 2023AUReported on an Australian Essence 64 in 2023; applies across variants fitted with MG Pilot all variants
An Australian buyer picked up a written-off MG4 at a salvage auction with 268 km on the odometer. From the damage, the car had gone onto the wrong side of the road and struck a pole hard enough to leave material embedded in the crossmember, fold the right-hand lower control arm and break the lower ball joint in two. Forum members discussing it connected it to the lane keep assist behaviour several owners describe, in which the car pulls towards oncoming traffic on roads with poor or misleading markings.
Feb 2024AUOne Australian salvage car in 2024; variant and cause not established all variants
It is well known that the lane systems re-arm every time the car is put into Ready. This owner, with a 2024 Australian long-range car, describes something different: he turns lane keep and emergency lane keep off from the quick menu once he is belted in and in drive, and after some time on the move they come back on by themselves with no obvious trigger. Another Australian owner of the same model says that should not happen and is not normal behaviour. Two dealers were no help - one said no updates existed for the car, the other claimed to have updated the infotainment but the version shown on screen was unchanged afterwards.
Apr 2026AUAustralian MY24 long range; lane keep re-arming mid-journey
Ask your dealer whether your car has had MG Australia's 7 February 2024 update, released for all MG4 variants in the Australian market to improve AEB operation, as it is dealer-applied rather than over-the-air.
May 2024AUall 2023 MG4, Australian market
Ask your dealer for technical bulletin AS-TEC-07022024-01, the 7 February 2024 AEB and Forward Collision Warning software update for Australian MG4s, which is free when applied at a scheduled service.
Feb 2024AUAS-TEC-07022024-01all Australian MG4 variants
Test the driver assists yourself on a decent drive before buying, because after the 2024 software updates some Australian owners still report adaptive cruise braking on bends with oncoming traffic.
May 2024AUall Australian MG4 variants
Owners consistently call the MG4's adaptive cruise nervous, choppy and timid. The recurring complaints are that it sheds too much speed through corners, that any small change in the speed of the car ahead produces sharp braking, and that lane changes trigger heavy deceleration. A November 2023 software update improved it noticeably for some owners, particularly the slowing-on-every-curve behaviour, but reports remain mixed and several owners simply stopped using it.
Jul 2024GeneralReported across MG4 trims on varying software; variant not identified as a factor all variants
Two of the three parking-sensor symptoms in MG's table are resolved without replacing anything. Under "inaccurately-measured distance from the obstacle", the manufacturer states plainly that sound-absorbing materials such as sponge and foam do not return the ultrasonic pulse, so the car cannot see them, and that an obstacle which is simply too small falls below what the sensor can resolve. In the other direction, under "warning given for no obstacle", the first listed cause of phantom beeping is dirt on the face of a sensor, and the second is a sensor that is no longer sitting at the correct mounting angle. So washing the bumpers properly and checking each sensor sits flush is the first thing to do, and a car that ignores a soft or slim object is behaving as MG expects rather than failing.
May 2022GeneralDocumented normal behaviour and self-checkable causes for the parking distance sensors; UK/EU document, physics not market-specific. all variants
MG's fault-finding routine for an inaccurately measured distance when parking starts by asking what the obstacle is made of, not by suspecting the car. Ultrasonic sensors work by bouncing sound off a surface, and MG states plainly that sound-absorbing materials such as sponge and foam send nothing back for the sensor to read. Its second check is size: an obstacle that is too small simply cannot be detected. Only once both are ruled out does the routine move on to a dirty sensor face and then to replacing a sensor. For an owner that reframes a lot of complaints. A thin pole, a tow ball, a low wheel stop, a wire fence, a bicycle or a padded cover behind you can read late, read wrong, or never register, and MG's own position is that this is how the technology works rather than something a dealer can fix. Keep using the camera and mirrors in a tight reverse instead of trusting the beeps.
2023GeneralParking distance control behaviour described in MG's UK repair information; a property of ultrasonic sensing rather than a market-specific setting. all variants
For the complaint that a warning is given when there is no obstacle, MG's list is short and starts with things you can see without a scan tool. Step one is that the sensor faces are dirty and need wiping clean. Step two is that a sensor is not sitting properly in the bumper, and MG's instruction is to check the fitting and adjust the mounting angle before condemning anything. Replacing the sensor comes last. Two things follow for an owner. Road film, mud, ice, snow, insects or a heavy coat of wax over a sensor is a real and free cause of phantom beeping, so clean them and retest before booking the car in. And if the phantom beeping started after a bumper repair, a respray, a towbar or a parking camera installation, MG's own second cause is a sensor that has gone back in slightly askew, which makes it the installer's problem rather than a warranty fault.
2023GeneralParking sensor diagnosis from MG's UK repair information; the causes are physical rather than market-specific. all variants
The parking distance control chapter describes a rear-obstacle system and nothing else: the layout, the sensor list and the service procedures all cover rear ultrasonic sensors in the rear bumper, with no front sensors anywhere in the section. What looks like front parking assistance is the 360 camera picture, not distance sensing. MG also publishes the thresholds: the beeping starts roughly 1,500 mm behind the car, about 600 mm at the corners, gets faster as you close in, and turns into a continuous tone at 300 mm. That 300 mm continuous tone is the number to remember when you are reversing to a wall in the dark, and the lack of front sensors explains why nosing into a tight space relies entirely on the camera view.
Jul 2023GeneralAll MG4 variants covered by the July 2023 manual; rear ultrasonic sensors in the rear bumper
Two separate automatic behaviours catch owners out. First, under emergency braking - when the ABS or stability control reports a hard stop, and only above about 50 km/h - the car flashes its brake or hazard lamps to warn traffic behind. As you come to rest, once you are under 10 km/h the hazard lights switch themselves on and stay on; they clear when you press the hazard switch, or once you have been above 20 km/h for five seconds, or after a restart. Second, if the car detects an impact it flashes the hazards automatically and brings the interior lights up immediately. That impact-triggered set is deliberately harder to cancel: a normal press will not do it, you have to hold the hazard switch down for more than five seconds. So hazards you did not switch on after a heavy stop or a knock are the car working as designed, not a fault.
Jul 2023GeneralBody control module logic, first-generation MG4; driven by ABS/stability control and impact signals. all variants
If your MG4's adaptive cruise sheds speed through bends, ask your dealer which software level the car is on — the bug had a named, dealer-applied fix, delivered in Australia and New Zealand via the R11 release and later builds.
Mar 2025AU+UKSCUK0012023 MG4; SCUK001 is the UK campaign code, Australian equivalent came via R11+ all variants
Expect adaptive cruise to shed speed by itself through bends, and be ready to feather the accelerator to hold pace - the slowdown builds the further you turn and keeps decaying the longer the corner lasts.
Jul 2024AU+UKall MG4 variants with ACC; quoted example is the AU XPOWER
Crossing into the oncoming lane to pass a stopped bus, truck or parked car can false-trigger the automatic emergency braking, which reads the approaching vehicle as being in your path despite adequate clearance.
Mar 2023-Aug 2025UK/EUAS-TEC-07022024-01all MG4 variants
Fast-approaching traffic behind you can make the car strobe its own hazard lamps — that is Rear Collision Warning on MG4s fitted with the rear radar suite doing its job, not a fault.
Jan 2024AUtrims with blind spot detection — not the base Excite 51
If the car brakes for no reason below 60 km/h, owners trace it to adaptive cruise control misreading parked cars and vehicles edging across your path, not to AEB - so setting Forward Collision Assist to alert-only will not stop it.
Jul-Aug 2024AU+UKall MG4 variants with MG Pilot
Expect a dulled brake pedal: CarsGuide's Australian launch review lists brakes lacking feel as a specific dislike, with the regenerative braking interfering with pedal feel even on the low setting.
Aug 2023AUall MG4 variants; more commented-on in the XPOWER
Australian owners agree that dropping Front Collision Assist from Medium to Low sharply reduces nuisance intervention: on Medium it alerts 'every time a car in front slowed down suddenly', on Low it 'really only goes off when a collision is imminent', and an AEB software update reportedly cut false detections further. The catch is persistence — one owner tried several times and reports the car 'always defaults back to medium next drive', enough that he would rather turn the feature off. Others say they simply run theirs on Low, but no one in the thread explicitly confirms the setting sticks, so check your own car. The thread makes no comparison with Lane Keep Assist.
date not establishedAUFront Collision Assist sensitivity menu; behaviour appears to vary by software build all variants
After SCUK001 a quick flick of the cruise control moves the set speed by 1 mph (or km/h) while a firm press jumps to the next round 5, and a long press on the ACC button toggles between plain adaptive cruise and Traffic Jam Assist. Cars that received the 1100R33 infotainment update without SCUK001 keep the old 5-step and have no mode toggle — which is why some owners find 'cruise' steering the car: it is silently sitting in TJA. Look for the steering-wheel symbol on the cluster.
Jun 2024UK/EUSCUK001UK MG4s; the 1 mph step is a quick test of whether SCUK001 was actually applied
One of the most disliked early behaviours, the adaptive cruise shedding speed on every bend, was addressed by software. Australian release notes list the cruise no longer slowing on curves, alongside lane keeping refinements, smoother traffic jam assist and better speed sign recognition. The catch is delivery: with no over-the-air updating in Australia, a car that has not been to a dealer since 2023 still behaves the old way. If your cruise brakes on curves, the fix may already exist for your car.
May 2024AUAustralian variants; applies across the range all variants
Australian owners are not insulated from the phantom braking reports that dominated UK coverage. One Australian Essence 64 owner recorded the front collision assist triggering unexpectedly twice at highway speeds, alongside lane keeping that jerked the car sideways without cause. This matters because MG Australia subsequently issued a bulletin specifically updating the emergency braking software, which indicates the problem was recognised locally rather than treated as a UK-only issue.
Oct 2023AUReported on an Australian Essence 64; forward collision warning is fitted across the Australian range all variants
Australian owners report that reducing the autonomous emergency braking sensitivity to its Low setting noticeably reduces false activations, and that unlike the lane keep setting it is generally retained between drives. Reports are not unanimous, with at least one owner finding it reverting to Medium after a restart, so check yours rather than assuming. This is the setting to look at first if your car brakes at things that are not there.
2025AUReported by Australian owners; applies across variants fitted with MG Pilot all variants
Beyond the general nervousness, Australian owners identify a specific failure case: the adaptive cruise reacting badly to stationary traffic in an adjacent lane, particularly approaching intersections. The practical handling is to press the accelerator, which overrides the system's braking without cancelling cruise, or to turn cruise off altogether in that environment. Knowing the override exists is the useful part, because the instinct is to brake, which cancels cruise and leaves you doing it manually anyway.
Dec 2024AUReported on Australian cars; applies across variants fitted with adaptive cruise all variants
An Australian owner pinned down a specific and reproducible adaptive cruise problem: an oscillation between accelerating and regenerating, most noticeable around 90 km/h in medium traffic, and distinctly worse with regen set to level 3. This lines up with the separate finding that dropping regen to level 1 smooths the cruise out. If your cruise control surges and slackens rhythmically rather than just braking sharply, the regen setting is the first thing to change.
Jan 2024AUReported on Australian cars; applies across variants with adaptive cruise all variants
Owners struggling to set an exact cruise speed find the trick is to commit to the press. A firm tap that takes the thumb controller through its full travel changes the set speed in 5 km/h steps, so going from 110 to 100 is two firm taps. Attempting the smaller single-kilometre increments is described by owners as difficult or impossible to do reliably while driving. Learn the 5 km/h action and use it rather than fighting for precision.
Dec 2023AUReported on Australian cars; applies across variants with adaptive cruise all variants
A used-car buyer was convinced his base Australian car had been built without cruise control, because the top two buttons on the steering wheel did nothing at all when pressed. Other Australian owners put him right: adaptive cruise is standard on every MG4 sold here, including the entry car, and the wheel buttons simply produce no visible response until the system has been switched on. The settings for cruise and the speed limiter live under the car icon on the screen, on the driver assistance page. If those pages are missing, or the buttons still do nothing with the system enabled, that is a fault worth pursuing under warranty rather than a missing option.
Jun 2026AUUsed Australian cars; apparently dead cruise and voice buttons all variants
If your adaptive cruise feels nervous, one Australian owner found that dropping regen to Level 1 - not Adaptive, not 2 or 3 - and switching Lane Keep Assist off cured it completely; unconfirmed by others, but it costs nothing to try.
Aug 2024AUMG4 variants with ACC (all AU trims carry MG Pilot)
When you pull out to overtake, expect the car to keep decelerating for the vehicle it was following and then be slow to build speed back, so be ready to override it with the accelerator.
Jul-Aug 2024Generalall MG4 variants with ACC
MG Australia told an owner-blogger its recent software delivers 'better lane keeping warning and steering control, speed control by 5kmh to 1kmh'. On the separate lane-keep campaign SC077, announced in the UK in January 2025, MG Australia said only that 'Headquarters are refining the update for Australia' and that it would be in touch when the update was ready for Australian vehicles. The cruise step is therefore a free, one-minute way to tell whether your Australian car has had any 2025 software at all. The source does not name the UK cruise-control campaign code.
2025AUSC077Australian MG4s serviced from 2025 onward all variants
An owner reporting the car "slamming on the brakes for no reason at times" had it resolved at a scheduled service by software updates plus a re-calibration of the sensors. The calibration is the half that is easy to leave off a booking which only says "update it", and it is the half that aims the sensor.
August 2026AUReported once, on an MG ZS. Indicative of what to request, not an MG4 fix all variants
A non-obvious fix from the owner who raised the complaint: with regen set to Adaptive, 2 or 3, the adaptive cruise behaves harshly, but setting regen to level 1 smooths it out and largely removes the nervous surging. It makes sense once you see it, since the cruise system is modulating speed through the same regen it has been told to apply aggressively. If you find the cruise unpleasant, try this before concluding the car is faulty.
Jul 2024GeneralReported on a UK car; variant not stated, so all are listed
A small thing that makes the cruise control much less irritating once you know it: a single press of the speed adjustment changes the set speed by 1 km/h, while holding it moves in 5 km/h steps. Owners who assume every press is a large increment end up fighting the control. The same round of updates also gave the system a memory for your preferred following distance, so it no longer resets that on every drive.
Sep 2023AUAustralian variants on the September 2023 software or later all variants
Because the adaptive cruise reacts late and then brakes and accelerates harder than a smooth driver would, it costs range. One owner drove the same fairly flat 100-mile motorway route both ways on a windless day and got 4.3 mi/kWh driving it himself, versus 3.9 mi/kWh letting the adaptive cruise do the work on the way back, at a slightly lower set speed and with no air-con either way. If you're chasing efficiency on a long run, driving manually and anticipating traffic can beat handing over to the system.
Aug 2024GeneralAdaptive cruise less efficient than manual driving on the motorway all variants
Owners note the shortest following-distance setting still leaves a big gap, one measured about 55 m at 100 km/h, and the system reacts only to the vehicle immediately in front rather than anticipating traffic further ahead. In moderate-but-not-jammed motorway traffic this creates a specific annoyance: after overtaking, when you move back across but can't drop straight into a clear gap, the car sees you closing on the vehicle ahead and brakes to match its speed. Dropping to regen level 1 with the minimum distance set softens the reaction but doesn't remove it.
Aug 2024GeneralClosest ACC distance still large (~55m at 100km/h); reacts only to car ahead all variants
An owner of a 2025 base-battery car describes the adaptive cruise not reacting at all when traffic ahead came to a standstill, leaving him to brake hard himself. He raises it in passing while asking about software versions, and nobody else on these pages reports the same thing, so it stands as a single account rather than a pattern. It is consistent with a limitation common to this class of system - radar-based cruise can be poor at recognising a stationary object in its own lane - and it is the kind of thing worth knowing before you trust the system in dense traffic.
Feb 2026GeneralAdaptive cruise not reacting to stationary traffic ahead
Expect a short start-up routine every trip: the MG4's CUSTOM mode forgets preferences between drives, so owners re-set things like one-pedal driving and the parking beep each time they get in.
Feb 2025AUall 2023 MG4
Expect Normal drive mode and KERS 3 back at every start, with no driver profiles to save your preference; assigning the steering-wheel star buttons makes switching a couple of presses rather than a menu dive.
Aug 2024UK/EUall 2023 MG4 variants (UK/EU sourced; not confirmed on Australian cars)
One-pedal mode and the selected drive mode revert to default on the 2023 Australian MG4 every time the car is switched off and locked, so you have to reselect them each trip.
Aug 2023AUall Australian 2023 MG4 variants
Because it needs regen headroom, one-pedal driving will not engage on a nearly full pack, with owners putting the cutoff around 89 to 90 percent depending on battery chemistry and temperature.
Feb 2025AUall MG4; note OPD was only added to the 51 LFP by the 1/9/2023 OPM campaign
If you are buying a used Australian-market Excite 51, check whether it has had MG's 1 September 2023 campaign that added One Pedal Driving, because the initial batch of those cars shipped without it.
May 2024AUExcite 51 LFP only, Australian market, early build
If you want one-pedal driving, expect to switch it on in a settings menu every single time you drive, and to still press the brake at the end, because the car creeps forward at low speeds.
Dec 2023AUall MG4 variants; MY23 stops closer to standstill than MY22
With no driver profiles in the MG4, drive mode reverts to Normal and regen to Strong at every start, so set the Custom drive profile up once and cycle round to it with the steering-wheel star button.
Jun 2023Generalall MG4 2022–2025
The car offers Energy Saving Mode somewhere around 15-30% depending on variant, and the manual states that accepting it limits air-conditioning power and fixes the regeneration level to Strong automatically. Owners' experience of it varies wildly — some notice nothing, others found themselves capped at a fraction of throttle or held to about 55 mph on a motorway. Most simply decline it and drive normally, which is worth knowing before you accept the prompt on a cold night.
date not establishedGeneralAny MG4 once charge drops far enough for the prompt to appear; trigger point varies by variant. all variants
A fair summary of the daily friction, from an Australian owner: two presses to turn on one-pedal driving, three to disable lane keep assist, every single time you get in. Because neither setting persists, and neither has a physical shortcut, the routine before setting off becomes a short menu ritual. It is the most consistently voiced complaint about living with the car, and it is worth understanding as a daily reality rather than a one-off annoyance before you buy.
Aug 2023AUAustralian cars on 2023 software; applies across the range all variants
MG's live data documentation lists a traction motor power reduction flag showing whether the drive motor is currently in a torque limited state, and alongside it a traction motor power reduction reason giving the specific cause. The documented values are unlimited torque, high stator temperature, high inverter temperature, high current, high voltage and rotor overspeed. In other words the car distinguishes between several different reasons for cutting power and reports which one applies.
2023GeneralDocumented for the MG4 drive motor generally, so all variants are listed
MG lists the drive unit as 54 kW continuous against 125 kW peak on the 51 kWh car, and 68 kW continuous against 150 kW peak on the 64, with both making the same 250 Nm of peak torque and both spinning to 17,000 rpm through a fixed 10.53:1 total reduction. Two things follow for an owner. Peak power is a short-burst figure: on sustained demand - a long climb, a series of hard overtakes, a track day - the drive unit settles nearer the continuous rating, which is where a car quietly goes softer without anything being wrong. And because peak torque is the same on both battery sizes, the 51 kWh Excite pulls away from a standstill just as hard as the 64 kWh cars; the difference is felt higher up the speed range and in sustained effort, not at the traffic lights.
2023GeneralEDU data for the 51 kWh and 64 kWh first-generation single-motor cars; UK/EU document.
Owners get a Vehicle Control System Fault message with a sharp drop in drive power and a loss of regenerative braking, which resolves after a few seconds when a 'Speed Limit Cleared' message appears. It has been seen both on the move and sitting stationary on a driveway, and a flat 12V was ruled out on the first car, which measured 12.7V. Three owners reported it independently over October and November 2022; one of them, 2.5 miles into a brand-new car, sat five hours at a dealer that could not identify it and was told they would have to speak to MG. Get the date and time of each event logged with the dealer so there is a record if it recurs.
Oct 2022UK/EUEarly MG4s; the transient nature makes it hard to reproduce at a dealer.
An Australian XPOWER owner timed 0-100 at different states of charge: 3.9 s at 98%, 5.4 s at 47%, 5.7 s at 34%, and 7.0 s at 10%. Other owners' experiences vary - one clocked 4.6 s at 50-60% and avoids hard launches below 30%, while another says he only notices the drop below 20%.
Jul 2024GeneralXPOWER only
XPOWER owners who actually tried Track Mode report it changes nothing about how the car drives: "literally does nothing", "Gimmick", and "I've never found a useful metric in there". One member retrofitted it to a non-XPOWER MG4 Luxury purely in software (GitHub: Tommasov/MG4_TrackMode), underlining that it is a display, not a calibration.
Nov 2025GeneralXPOWER (software mode; retrofittable to other trims)
Select one-pedal driving just after charging to full and the car declines, showing a warning that reads as a low charge message. It is not a fault and it is not about low charge. A nearly full pack has nowhere to put regenerated energy, so strong regen is withheld until the state of charge falls. Owners put the threshold somewhere between the high eighties and mid nineties percent depending on the car, and it simply starts working as you drive the charge down.
Sep 2023GeneralReported on both LFP and NMC cars with no confirmed chemistry difference; thresholds varied by individual car all variants
A recurring frustration rather than a fault: the MG4 does not remember driving preferences between journeys, so settings such as one-pedal driving have to be reselected each time you get in. Owners who use one-pedal driving as their normal mode find themselves reaching for the screen at the start of every trip. There is no supported way to make it persist on the affected software, and it is separate from the lane keep and overspeed settings that also re-arm each drive.
Oct 2023AUReported on an Australian Essence 64; behaviour described as general to the car rather than variant-specific all variants
A persistent myth among new electric car drivers is that pressing the brake pedal throws away energy that one-pedal driving would have recovered. On the MG4 the pedal applies blended braking, using regeneration first and friction only as needed, and one owner recorded a regen readout of around minus 25 during firm braking, with a peak of 85 kW seen on a steep descent. Regen also cannot bring the car fully to rest, so friction brakes always finish the stop regardless of how you drive. Drive smoothly rather than agonising over which pedal recovers more.
Jan 2024AUReported on Australian cars; blending behaviour applies across the range all variants
Even at the strongest setting, regenerative braking can only slow the car to around walking pace; the friction brakes always complete the stop. That is a physical limitation of using the motor as a generator at very low speed, not a shortcoming of the MG4's implementation. It matters for two reasons: one-pedal driving does not mean never touching the brake pedal, and the friction brakes are still doing work at the end of every stop, which is why they do not seize even on a car driven almost entirely on regen.
Jan 2024AUAustralian owners; applies across the range all variants
An Australian owner reported his car travelling backwards at least three metres as a learner driver braked to a stop sign on a slight uphill, and again the same day approaching a stop on a downhill. Other owners described being able to reproduce it fairly consistently by being in one-pedal driving mode and braking firmly over the last few metres before a complete stop. He reported it to the dealer, to MG Australia and to the Australian government's vehicle safety issue channel. The dealer's own job card records that they reproduced it every time, found no fault codes, opened a technical case with MG, and concluded it was normal operation that the vehicle was designed to do.
Aug - Dec 2024AUReported on Australian cars from 2024; variant not identified as a factor, and reports span both older and updated software all variants
Australian owners who use one-pedal driving selectively describe long steep winding descents as where it genuinely shines, letting you modulate speed continuously without moving between pedals, which one owner who drives with a single foot found particularly valuable. Around town the benefit is smaller and largely a matter of preference. Owners who do not want it on all the time point out you can use maximum regen without one-pedal mode and get most of the same effect with the brake pedal still doing the final stop.
Aug 2024AUAustralian owner experience; applies across variants with one-pedal driving all variants
On the 2023 model year the one-pedal driving setting resets every time you start the car, so you have to turn it back on for each drive. MG confirmed this in writing to an owner, saying the memory was added on the 2024 model year following customer feedback. Owners report the newest infotainment and control-module software from the dealer makes a 2023 car keep the one-pedal setting after a restart too, so if this annoys you it is worth asking the service centre to bring the car up to the latest software. Note the lane-keep 'alert only' preference is still not remembered even on the latest software.
Jan 2025GeneralReported on 2023 vs 2024 model-year cars; applies across the range all variants
When the car slows hard enough, whether from the friction brakes or just from lifting off with regen, it illuminates the brake lights for the traffic behind, because regulations require brake lights once deceleration passes a set rate. Owners report that gentle regen (around level 1, roughly 5 percent braking effort) stays below the threshold and doesn't trigger the lights, while stronger regen or adaptive-cruise braking does. So one-pedal and adaptive-cruise slowing is signalled to following drivers even though you pressed nothing, which is reassuring, though a couple of owners worried it can add to brake-light waves in heavy motorway traffic where the car ahead merely lifted off.
Aug 2024GeneralRegen deceleration above a threshold auto-lights the brake lights all variants
The selector knob contains a Hall-effect angle sensor that reads only reverse, neutral and drive, and sends those over the powertrain network to the motor controller. Park is a separate button whose signal goes instead to an electronic park motor control unit bolted to the outside of the gearbox casing; when it receives the P command the motor turns a splined shaft that pushes a pawl into the park gear on the input shaft. So P is an electrically commanded action rather than a mechanical linkage from your hand - which is why it is a button, why it needs the car powered to engage or release, and why on a steep slope the electric park brake, and a chocked wheel if the car is being left a long time, are sensible belt and braces.
2023GeneralFirst-generation MG4 gear selection and park mechanism; general vehicle fact. all variants
Snow mode sets regen to level 1 and turns one-pedal driving off, and multiple owners report those settings are not restored when you switch back out of Snow mode, so re-check both afterwards.
Jan–Mar 2026UK/EUXPOWER; the Snow-mode regen behaviour applies more broadly all variants
In one UK owner review of the XPOWER, 0-60 is reported slipping from under 4 seconds to 6-7 seconds once the pack drops below roughly 50% charge.
Feb 2026UK/EUMG4 XPOWER 64 AWD
If you have an early Excite 51 with no one-pedal driving option, it may not have been built with it. MG Australia ran a campaign from September 2023 that added one-pedal driving to the 51 kWh variants specifically. Cars that never went back to a dealer may still be without it. Since Australian MG4s do not update over the air, the feature does not arrive on its own; it needs a dealer visit.
Sep 2023AUAustralian 51 kWh variants; the larger packs were not part of this campaign
An Australian owner reports one-pedal driving occasionally overcompensating on downslopes to the point of putting the car into reverse. That is a genuinely unwelcome behaviour on a hill, and it is worth knowing about if you use one-pedal driving on steep terrain or in a sloping driveway. Owners who encounter it fall back to conventional regen levels in that situation rather than relying on the car to hold the vehicle stationary.
2025AUOne Australian owner report; variant and software version not stated all variants
The practical response to the reverse-on-stop reports, from the owner who experienced it: the risk is highest for drivers who have learned to trust one-pedal driving and auto hold to bring the car to a complete stop with minimal braking, because they are not covering the brake at the moment it matters. His car did this twice in one day with a learner driving. Drivers used to older cars tend to keep a foot near the brake out of habit; newer drivers taught on one-pedal cars do not. Worth a conversation before handing the keys to anyone learning.
Aug 2024AUReported on an Australian car; applies to any MG4 driven in one-pedal mode all variants
Owners coming from a Nissan Leaf or Tesla were surprised that the MG4's one-pedal driving only works going forward; when reversing there's no equivalent one-pedal deceleration, so you have to use the brake to control and stop the car. It's a behaviour difference worth knowing when manoeuvring, especially on a slope, and it reinforces the general advice to keep a foot ready over the brake whenever you use one-pedal driving.
Apr 2024GeneralOne-pedal driving inactive in reverse all variants
Australian owners report the MG4's speed-sign recognition displaying limits well below the actual limit, which matters because that reading feeds the driver-assistance systems.
2026AUAustralian MG4; Excite 51 and Essence 64 most frequently named all variants
Treat the displayed speed limit as a suggestion: the camera adopts limits from decals on the back of trucks and from signs on side roads and off-ramps, and many owners simply switch traffic sign recognition off.
Jan 2025AU+UKall MG4 variants
When the speedometer reads improperly, MG's ordered causes are: the instrument pack software first, then its wiring, then the instrument pack itself, then the dynamic stability control module, then the gateway. The speed number does not come from the motor or the transmission - it originates in the chassis stability control system and is passed across the car's network through the gateway before the cluster displays it. Two things follow for an owner. A speedometer that reads oddly is treated as a software problem before it is treated as a hardware one, so ask whether an instrument software update exists. And if a speed error appears alongside anything else stability- or wheel-speed related, mention them in the same breath, because they may share a root.
2022GeneralUK/EU service volume; the signal path is a vehicle characteristic, not market specific. all variants
Among UK and EU owners, whether the overspeed chime sounds genuinely differs from car to car, and they attribute it to registration date rather than software build, so another owner's settings may not apply to your car.
Sep 2025-Jan 2026UK/EUvaries by software build (R59 vs R67 cited); mostly UK/EU cars all variants
Don't treat the displayed speed limit or the speed chime as authoritative: some Australian owners report the sign recognition showing incorrect limits, often well below the real one.
checked Aug 2026AUAustralian-market MG4 (2023–2026 listing, 3.1/5 from 14 reviews) all variants
Owners are split on this and both camps are right, because the behaviour changed with software. Some have to turn the overspeed warning off from the MG Pilot screen on every single journey; others report it staying off once set. Setting the overspeed threshold to its maximum is sometimes suggested as a workaround but does not work for everyone. If yours resets every drive, it is behaving as earlier software did rather than being faulty.
Sep 2025GeneralReported across MG4 trims on varying software; variant not the determining factor all variants
An Australian Excite owner described the traffic sign recognition picking up the wrong signs, such as a slower limit on a highway off-ramp, and then flashing an over-speed warning on the dash while you are actually within the limit. It is distracting and it undermines trust in the system. Turning traffic sign recognition off, or at least silencing its audible alerts, is a common owner choice, and doing so does not affect the actual speed limiter or cruise control. If the constant warnings bother you, it is a setting you can change rather than something you have to live with.
Apr 2026AUReported on an Australian Excite 51; the feature is fitted across the range all variants
If no setting you change survives a power cycle at all, treat it as a fault to raise with your dealer rather than the normal ADAS and drive-mode reset every MG4 performs at each start.
Late 2025 (approx. Nov)AUAustralian MG4; reported on Excite and Essence variants
Leave the opt-in setting that makes the car adopt detected speed limits switched off unless you really want it - it enforces a misread sign with real deceleration, not just a changed number on the dash.
Jan 2025AU+UKMG4 with Intelligent Speed Limit Assist active all variants
Brake firmly from speed once a week where it is safe to do so, and run a lower regen setting for stretches, so the rear discs get used instead of corroding while regen does all the stopping.
Nov-Dec 2023UK/EUall MG4; worse in coastal/humid climates and for one-pedal-driving owners
Take a wet test drive before buying: on a UK owners' thread, one experienced driver called the slightly worn factory Continentals like driving on ice in anything but perfect dry conditions.
Feb 2023AU+UKUK-market cars most reported; AU Excite 51 on 17-inch Continental PremiumContact reviewed more favourably all variants
One owner found both rear discs significantly corroded at about 3,700 miles, with the parking brake binding and a scoring noise under braking; the dealer replaced them under warranty. The cause is not a defective part but how the car is driven. Strong regenerative braking means the rear friction brakes do very little work, so the discs never get wiped clean and surface rust builds and pits. Deliberately using the friction brakes now and then, including some firmer stops from speed, is what keeps them clear.
Jan 2023GeneralReported on UK cars across trims; the mechanism applies to any MG4 driven mostly on regen all variants
A long-running thread describes the tyres fitted to early Standard Range cars as giving markedly poor wet grip, with owners reporting loss of traction and rear instability when accelerating on damp roads. Owners overwhelmingly moved to all-season replacements, most commonly the Michelin CrossClimate 2, and described the change as transforming wet behaviour, with one reporting no measurable range penalty over 13,000 miles.
Feb 2023UK/EUEarly UK Standard Range cars, equivalent to the 51 kWh Excite in Australian naming, though the specific original fitment may differ by market
Australian owners repeatedly report new cars delivered with tyre pressures well below specification, in some cases under 20 psi, which is low enough to be dangerous as well as to trigger warnings. Setting them to around 36 to 37 psi both stops the warnings and puts the car where it should be. This is the single most worthwhile check to do before you drive a new MG4 away, and it also removes the most common cause of the highway vibration owners chase for months.
Dec 2024AUReported by Australian owners on delivery; applies across the range all variants
MG's live data documentation for the MG4 lists front left, front right, rear left and rear right tyre temperature as readable values, described as the actual tyre temperature when the tyre sensor is operating normally, reported in degrees Celsius. They sit alongside the pressure values from the same sensors. The tyre pressure monitoring system on this car is therefore a direct sensor system reporting real measured values per wheel rather than a system that infers a soft tyre from wheel speeds.
2023GeneralDocumented for the MG4 generally; direct tyre pressure monitoring is fitted across the range, so all variants are listed
Owners who picked up a nail or screw had the tyre plugged from the outside, or removed, inspected inside and permanently repaired, for around 25 pounds in the UK, with no need to reset or reprogram the tyre-pressure monitoring. The pressure sensors sit on the valves and aren't disturbed by a plug repair, so any competent tyre shop can handle it like any other car. Expect the dashboard to still show a low-pressure warning as you drive away; it clears itself after roughly half a mile once the system re-reads the corrected pressure, so don't assume the repair failed while the warning lingers.
Sep 2023GeneralPlug repair of tread punctures needs no TPMS reset; reading self-corrects after driving all variants
The exclusion list carries a clause that lands squarely on the MG4: any additional charges resulting from failure to carry a legal and serviceable spare wheel or tyre are yours. The AA will try to arrange help from a third party on your behalf, but it will not pay the call-out or the repair, and all other costs fall to you. A separate clause says the same about specialists generally - if the AA decides a tyre, locksmith or body-glass specialist is needed, it will endeavour to arrange one but will not pay for them, and the contract for the work is between you and that firm. Since the MG4 ships with a sealant kit rather than a spare, a sidewall cut or a large gash that sealant cannot fix leaves you paying for the mobile tyre fitter or the tow to one. It strengthens the case for carrying a proper plug kit, or fitting a space saver, rather than relying on the kit in the boot plus breakdown cover as a safety net.
Apr 2019UK/EUUK MG Assistance exclusion; the underlying no-spare-wheel fact applies to MG4s in every market.
Each scheduled service includes checking tread depth and looking for damage, deformation or uneven wear, checking and correcting the pressures, checking the four-wheel alignment data, and rotating the wheels front to rear as appropriate - and the visit finishes with a road test of the power system, brakes and steering. Plenty of owners pay a tyre shop separately for a rotation that is already inside the service. Ask whether the rotation and the alignment check were actually carried out, and expect the tyre pressure monitoring to need its positions relearned afterwards if the wheels were moved around.
2023UK/EUTyre and wheel items in the UK/EU scheduled service; verify the Australian fixed-price service includes the same. all variants
The exceptions table lists tyres as zero months and zero miles - the manufacturer's warranty simply does not cover them - and puts wheel balance and wheel alignment on a three month or 1,000 mile term. That is the paperwork behind two familiar owner complaints: flat-spotted tyres after weeks at sea, and wheels that arrive from the factory noticeably out of balance. If your new MG4 vibrates on the motorway, the balance claim has a very short life and the tyre itself is not a warranty item at all, so raise it immediately and in writing, and expect any remedy to come as dealer goodwill or under consumer law rather than under the warranty. Other short-life wear items - wipers, bulbs, fuses, remote batteries, an air-con re-gas - are covered, but only for six or twelve months, and general wear and tear items other than tyres are covered only through the first 12 months or up to the first chargeable service.
Oct 2021UK/EUWarranty cover for tyres, balancing and alignment; UK statement, and consumer law may override in AU. all variants
The maintenance sheet tells the technician to mark the relative wheel-to-stud position before removing the wheels, apply anti-seize compound to the hubs, and refit each road wheel in its original hub and stud position. There is no tyre rotation step anywhere in the schedule. So if you want your tyres rotated on an MG4 it is a separate request, not something a standard service includes, and it is worth thinking twice about: rotating them changes which pressure sensor is at which corner, and owners report the pressure monitoring then needs relearning, which can mean another dealer visit. What the service does cover is checking tyres for damage and uneven wear, recording tread depth at all four corners plus the spare, and setting pressures.
2023UK/EUWheel refitting and the absence of a rotation step in MG's MG4 service schedule; UK/EU document. all variants
Owners worked out for themselves that MG4s vibrating on the highway were often sitting on tyres flat-spotted by weeks of standing still in transit or in stock. MG's own bulletin says the same thing: poor stock maintenance during storage, such as long-term parking without the car being moved, causes tyre flat spots which intensify steering wheel and body vibration. It also makes a road-force test part of the official inspection sequence - not an ordinary balance, but a test of the tyre's road force, with any tyre that fails to be replaced before anything else is done to the car. That matters when a dealer says the wheels balanced fine, because an ordinary balance will not find this.
Mar 2024GeneralStated in the XPOWER vibration bulletin; the mechanism is general but MG documents it only for that variant.
MG documented this one precisely. An instrument pack configuration file released on 12 September 2023 changed the tyre pressure display from bar to kPa. Bulletin SI-TB2024011801 says that if the customer prefers bar, the dealer reconfigures the instrument pack to a newer configuration released in January 2024, which puts the units back. It is a 0.2 hour job on MG's diagnostic system, claimed as a technical service bulletin, with the diagnostic report attached to the claim. The important point for an owner is that the units are set by a configuration file loaded into the instrument cluster, not by a menu you can reach - so if the units changed on their own after a dealer visit, that is why, and it is reversible by another dealer visit rather than something you have to live with.
Jan 2024UK/EUMG Motor Europe bulletin; the configuration file versions cited are European releases. all variants
MG explains that the sensor identity codes are stored in the body control module and survive a power cut, but the live pressure values do not: after the module loses power or the 12V battery is disconnected, all four wheels display dashes. The sensors sleep when the car is parked, so nothing arrives until the wheels are turning. Drive at 40 km/h (25 mph) or above and each sensor switches to rolling mode, transmits, and the display fills in. There is a stationary alternative too - deliberately dropping a tyre's pressure by more than 30 kPa makes that sensor wake and report. So blank pressure readings after battery work are expected behaviour, not a fault and not a workshop job.
2023GeneralFirst-generation MG4 TPMS behaviour; general vehicle fact, UK/EU document. all variants
Each valve-stem sensor senses acceleration. With the car stationary it drops into a standby mode, samples the pressure only at intervals, and stays silent unless something changes - which saves its own internal battery. Once the car moves it enters rolling mode and transmits regularly. It also compares each sample against the previous one: a sudden difference triggers a recheck and then an immediate fast-leak warning, which is the alert that is distinct from the slow "low tyre pressure" message. This is exactly why a parked or charging car can show stale, missing or plainly odd pressures, and why the numbers only make sense again after you have driven a short distance.
2023GeneralFirst-generation MG4 TPMS operation; general vehicle fact. all variants
MG's alignment data gives the rear wheels a nominal camber of about minus 1 degree 15 minutes and total toe-in of 24 minutes, and both are adjustable on the car: an eccentric bolt and washer at the inner end of the rear lower control arm sets rear camber, and an eccentric bolt on the rear lateral push rod sets rear toe. Plenty of hatchbacks have no rear adjustment at all, so two things follow. A genuine four-wheel alignment is possible and worth asking for on this car rather than accepting a front-only tracking check, particularly after kerb damage or a suspension repair. And that amount of static negative camber loads the inner shoulders of the rear tyres, so when you check tyre wear, get a hand right around to the inner edge rather than judging by the outer tread you can see.
2023GeneralAlignment specification from MG's UK/EU training material; geometry is a vehicle characteristic, though check the figures against your own build. all variants
MG's suspension diagnosis for a car that will not track straight opens with checking the wheels and tyres and then physically rotating them, before anyone looks at arms, bushings, bearings or subframes. The idea is simple: if the pull moves or disappears when the wheels change corners, the tyre is the culprit and nothing needs replacing. MG's list for the related complaint of pulling under acceleration is shorter still - just two items, uneven tyre pressures and then wheel alignment. So if your MG4 drifts on a flat road or leans to one side when you accelerate, the manufacturer's own expectation is that it is tyres or pressures first and alignment second, and only then anything expensive. Worth knowing before you accept a quote for suspension parts.
May 2022GeneralMG4 Electric first generation; UK/EU documentation, diagnostic logic is a vehicle fact all variants
The MG4's parking brake is electric, and MG's diagnosis for one that does not hold properly is remarkably short: rear pad thickness, then the parking motor itself checked for damage, corrosion or looseness, then the parking brake switch. Corrosion being written into the manufacturer's own expected cause list is significant on this car, because the rear brakes do so little work that the whole rear corner tends to sit wet and unused. Owners have already reported sticking parking brakes traced to dry caliper slide pins and heavily corroded rear discs. MG's material shows the electric motor that applies the brake is itself vulnerable to the same environment. If your parking brake feels weak or lets the car creep on a slope, ask for the motor to be inspected, not just the pads.
May 2022GeneralMG4 Electric first generation; UK/EU documentation, corrosion risk is higher in coastal or wet climates all variants
Heavy steering, a steering wheel that will not return to centre after a corner, and uneven tyre wear are three different complaints with three different procedures - and all three open with the same step: is the tyre pressure within the specified range, and is it too low. Only then does MG move on to the strut top bearing, the lower arm ball joint and bush, the steering knuckle, and finally wheel alignment. For abnormal tyre wear MG also checks wheel balance before alignment. Given that MG4s have been delivered with pressures well under 20 psi and that the manufacturer's own figure is around 2.5 bar, an MG4 that feels unusually heavy to park or lazy coming out of a corner is worth a pressure gauge before anything else.
2022GeneralHeavy steering, poor self-centring and uneven tyre wear on the first-generation MG4 all variants
MG's instructions require brake pads and shoes to be renewed as complete axle sets, never corner by corner. That is a direct cost fact for MG4 owners because of how this car wears its brakes: the rears do almost nothing in normal driving thanks to regeneration, so when they do need attention it is usually corrosion or a sticking caliper on one side rather than even wear across the axle. Being quoted for two sides when only one corner is the problem is therefore MG's own instruction rather than a workshop padding the bill. The practical consequence is that any rear brake work on this car is effectively a pair job, and it is worth having both rear discs assessed at the same time, since heavily corroded discs and fresh pads are a poor combination.
Jul 2023GeneralBrake friction material replacement rule; relevant to MG4 rear disc corrosion all variants
MG's own procedure for teaching the car which tyre pressure sensor is at which corner is slower than most people assume. Before the learning routine is run, the car should have been driven continuously above 40 km/h for more than ten minutes - unless the technician has written down the ID printed on the new sensor - and if several sensors are being learned one after another, MG requires at least two minutes between each one. The routine writes each sensor's identity against a fixed position on the car, which is why moving wheels around, not just replacing a sensor, triggers it. So if a tyre shop swaps or rotates your wheels and hands the car straight back, the pressure display may well be reporting the wrong corner until someone does this properly.
Jul 2023GeneralAfter tyre pressure sensor replacement or any change of wheel position all variants
On the rear axle the parking brake is an electric motor built into the caliper, so the piston cannot simply be wound or pressed back the way a front one can. MG's own procedure is to command the parking brake to retract with a diagnostic tool, disconnect the 12V negative, change the pads, reconnect, and then use the tool again to adjust the parking brake before the car is driven. Replacing the parking motor itself adds a further initialisation step. Two things follow for an owner. A workshop that cannot talk to the MG4's brake module cannot correctly do rear pads, whatever it says about the job being ten minutes a side. And because the job disconnects the 12V battery, you inherit the usual after-effects of that: blank tyre pressure readings until the car has been driven, and a 12V system that takes hours to work out its own condition again. Front pads need no tool at all.
Jul 2023GeneralApplies to all first-generation MG4s; the manual is the UK/EU July 2023 issue but the hardware is not market-specific
MG's brake specification splits the range in two. The 51 kWh and rear-drive 64 kWh cars run 300 mm front discs 25 mm thick with 300 mm rears 12 mm thick. The all-wheel-drive 64 kWh (the XPOWER) and the 77 kWh Long Range share a much larger set: 345 mm fronts 30 mm thick and 340 mm rears 22 mm thick. That is worth knowing before you buy, because it means the Long Range quietly carries the performance car's brakes, and it means replacement discs and pads for those two cars are a different, dearer part. MG also publishes the wear limits, so you can measure instead of taking a quote on trust: front discs are finished below 23 mm (28 mm on the big-brake cars) and rears below 10 mm (20 mm), pads are quoted at 11 mm front and 10.5 mm rear when new with 2 mm the minimum allowed, and maximum disc runout is 0.05 mm. MG's own rule is that discs are replaced in pairs across an axle, unless the one being kept was fitted less than 1,500 km ago - so a quote for a single disc is not MG's method.
Jul 2023GeneralBrake hardware by variant; a characteristic of the car rather than of a market all variants
Each of the MG4's four tyre pressure sensors carries a unique identity that tells the body control module which corner it is sitting on, and the module - not a separate TPMS box - is what reads them. MG's procedure after fitting a new sensor is an explicit self-learning routine performed on the body control module with diagnostic equipment; the car does not work it out for itself. So if you buy a second set of wheels, replace a sensor after a puncture, or let a tyre shop fit a cheap aftermarket sensor, ask first whether they can carry out the MG self-learn, or you may get the car back with a permanent warning light or a corner that reads dashes. A related quirk from the same section: cutting the 12V power keeps the sensor identities but wipes every stored pressure, which is why the display shows dashes after battery work until the car has been driven.
Jul 2023GeneralTyre pressure sensor replacement; general to the car all variants
Inside the rear brake disc procedure MG states plainly that brake discs must be replaced in pairs, and allows only one exception - where the disc on the other side has just been renewed and has covered less than 1,500 km. That matters because the MG4's rear discs corrode badly from disuse, so it is common for one side to look worse than the other and for an owner to hope for a single-disc bill. By the manufacturer's own instruction the correct remedy is both sides of that axle, and a workshop quoting one disc is departing from MG's procedure rather than saving you money.
Jul 2023GeneralStated in the rear brake disc replacement procedure; applies per axle. all variants
The wheel alignment chapter states plainly that fitting aftermarket wheels causes extra deviation of the vehicle and greatly increases the scrub radius, because a replacement wheel moves the tyre's centre line away from where the suspension geometry expects it. The consequence it then names is severe shimmy after hitting an uneven road surface, on top of reduced straight-line stability. This is first-party confirmation of something owners usually only hear second hand: the MG4's front geometry is designed around a particular wheel offset, and a wheel with the wrong offset is not merely a cosmetic choice, it changes how the car tracks and how it reacts to a pothole. None of that shows up on an alignment printout, because scrub radius is designed in and cannot be measured or adjusted afterwards.
Jul 2023GeneralMG4 EV, July 2023 workshop manual, Wheel Alignment Description and Operation (manual p300-p301) all variants
MG publishes a list of places a jack or axle stand must never touch on an MG4: the body structure, the bumper, brake lines, the front and rear suspension arms, the steering linkage, the high-voltage battery module, the drive motor, the transmission housing and the rear towing eye. Stands go under the reinforced sill brackets, and the front of the car is raised only at the designated jacking points or the bracket on the front of the front subframe. MG also specifies a jack rated at 1,500 kg or more, which rules out some cheap trolley jacks, and states plainly that the jack carried in the car is for emergency wheel changes and nothing else. Chock the wheels, and never work under a car held up by a jack alone.
Jul 2023GeneralFirst-generation MG4, all variants
The rear calipers carry the electric parking brake motor, and MG's procedure is not the wind-back you would do on an ordinary car. Before the rear pads, discs, caliper body, caliper bracket or parking motor can be disturbed, the brake system has to be commanded into a service mode so the caliper piston returns to its starting position. Afterwards the technician exits service mode and runs an assembly initialisation, which makes the car relearn the gap between the piston and the new friction material. Skip that last step and the parking brake is still working to the clearance it learned from the old, worn pads. For an owner this is the practical point: a rear brake job on an MG4 is not a driveway task and not something every general garage can complete properly, so ask before you book whether the workshop can run MG's parking brake service mode and initialisation routines. Front brakes are conventional by comparison.
Jul 2023GeneralAll first-generation MG4 rear brake friction work; from the UK/EU July 2023 workshop manual, but the requirement is a property of the car.
In the AWD 64 kWh XPOWER on its standard 18-inch Bridgestone Turanza tyres, Australian reviewers report the front tyres scrabbling for grip under hard acceleration, with mild tug at the wheel.
Jul 2024AUXPOWER only
After a rotation or refit, set every tyre to your door-placard pressure (around 36 psi on most MG4s) and the TPMS warning clears itself within a short drive, with no dealer visit needed.
Wiki, 2022-2026UK/EUMG4 2022–2025, all variants
The XPOWER wears 235/45 R18 Bridgestone Turanza T005 EV tyres, a grand-touring comfort tyre on a roughly 320kW all-wheel-drive car, and some owners run them harder than the 37psi placard figure.
Oct 2024UK/EUXPOWER 64 AWD only (18-inch Bridgestone Turanza T005 EV)
Several owners found the high-speed vibration largely disappears with cold pressures raised to about 40-41 psi, well above the placard setting, at the cost of a harsher low-speed ride. One owner also found the dashboard was reporting 2.7 bar while a trusted gauge read only 36 psi on the same tyre, so check with your own gauge rather than trusting the TPMS readout. This is a mitigation, not a repair — MG's own bulletin lists pressure adjustment as only one of four steps.
Apr 2024AU+UKMG4 XPOWER with the 100-120 km/h vibration, before dealer work
Separate from the XPOWER drivetrain problem, non-XPOWER MG4 owners report a steering vibration starting above 100 km/h and worsening with speed, on cars that balanced perfectly. Repeat balancing, rotating and swapping front-to-rear changed nothing; fitting four new tyres cured it completely in more than one case, including a car that had run its original Bridgestone Turanzas to 50,000 km. If your MG4 vibrates and the wheels check out, suspect the tyres themselves before chasing suspension work.
Dec 2025UK/EUNon-XPOWER MG4 (77 kWh Luxury/Long Range) above 100 km/h
One XPOWER owner chasing a hum and vibration found his dash showed about 2.7 bar (~39 psi) while a reliable gauge read 36 psi cold on the same tyres, so he had been running under-inflated — that is one owner's measurement, not a proven trait of every car, so check yours with your own gauge rather than assuming the offset. Setting 40-41 psi cold by hand gauge is what several owners say worked: one reported the hum gone and the vibration "very very slight" on the motorway after rebalancing had achieved nothing, another hardly felt it at 268 kPa over 200 miles. The caution raised in the same thread is inner-edge wear, not centre wear — a lightly loaded car at high pressure loaded the rear inner edges and castellated the tyres.
Apr 2024UK/EUXPOWER at sustained highway speed; hum and vibration that survives a wheel rebalance
Australian owners report a loud clunk from the rear of the car, usually the left side. One heard it about three times driving forward out of his garage; another has heard it going over speed bumps in car parks and when turning left into an uphill driveway, so it is not confined to the first movement after parking. The handbrake disengaging was floated as a cause but nobody established what it actually is, and one owner says his stopped doing it after a while — 'maybe something settled in'. Worth mentioning at your next service rather than treating it as an emergency.
date not establishedAUFirst movement after parking, especially on a slope or after the park brake has held load
The MG4 ships with a tyre sealant and compressor kit rather than any kind of spare. Owner experience with the sealant is genuinely divided: some have used it successfully on several occasions while accepting its limits, and at least one found it hopeless and had to limp to a garage anyway. Sealant will not deal with a sidewall cut or a large gash whatever the packaging says. The practical additions owners recommend are a portable pump kept in the car, a space saver if you can accommodate one, and knowing whether your roadside assistance covers a mobile tyre service.
Aug - Sep 2023GeneralReported across MG4 trims; no variant ships with a spare as standard all variants
Owners who want a physical spare have got one in, but it is a modification rather than a fitment. A space saver will not sit under the rear compartment floor as delivered; one owner fitted a skinny spare by accepting the boot floor sitting roughly an inch to an inch and a half higher, securing the wheel with velcro alongside a jack and compressor. Purpose-made MG4 space saver kits were quoted around $720 in Australia, and owners also discussed adapting wheels from other cars, though nobody in the thread confirmed the fitment data.
Jan - Jun 2024GeneralReported on 2022-2025 cars; boot floor arrangement assumed common across trims but not confirmed per variant all variants
An Australian owner who used the supplied sealant on a sidewall puncture was told by the tyre fitter that the sealant damages the rubber, and the tyre was replaced rather than repaired at around $285 to $305 for a Continental. The consensus among owners on that forum is that the goo kits are unreliable and that a plug kit is the better thing to carry for small tread punctures, since a plugged tyre can still be properly repaired afterwards. Note a sidewall puncture is not repairable by any method and always means a new tyre.
2026AUReported by Australian owners; applies to any MG4 carrying the standard sealant kit all variants
For owners who want a real spare, the option Australian owners point to is a Braumach space saver kit at roughly $590 to $690, and at least one experienced owner recommends it over the supplied goo outright. The same owner also carries a portable inflator as a backup, which covers the common case of a slow leak that just needs air to get you home. Between them a space saver and a pump cover most roadside tyre situations that sealant does not.
2026AUAustralian owners; check wheel fitment for your own variant and wheel size all variants
Two known things combine usefully here. A full battery has nowhere to put regenerated energy, so regen is unavailable and the car uses friction braking instead. And the MG4's rear discs corrode precisely because regen means they are barely used. An Australian owner who found braking had gone rough after heavy rain cleared it by applying firm friction braking several times, and pointed out that the drive immediately after a 100 percent charge is when the friction brakes are doing the work anyway. Use that drive to bed them in rather than fighting the lack of regen.
May 2025AUReported on Australian cars; the mechanism applies to any MG4 all variants
One of the genuine running-cost advantages: because regenerative braking does most of the slowing, the friction brakes see a fraction of the work they would in a petrol car and the pads last correspondingly longer. What does still come due is periodic brake fluid replacement, which is a time-based rather than distance-based item and is one of the things that makes the later scheduled services more expensive. The offsetting risk is corrosion rather than wear: discs that are never used rust rather than wearing out.
Oct 2024AUAustralian owners; applies across the range all variants
The handbook states that the tyre pressure monitoring system requires self-learning after a rotation and directs owners to consult a dealer for the procedure. In practice that means the positions reported on screen will be wrong until it relearns, so a warning may point at the wrong corner. If you rotate tyres yourself or use an independent tyre shop, be aware the system may need attention afterwards and check what your car actually does before trusting the corner it names.
2024AUReported by Australian owners referencing the handbook; applies across the range all variants
There is no single answer to what tyres an MG4 comes on. Australian owners taking delivery around the same time reported Bridgestone Turanza T005 EV on some cars and Continental on others, with one owner finding the Bridgestones quieter than the Michelins he was used to. This matters when reading other owners' experiences of grip, noise and wear: they may not be talking about the same tyre you have. Check the sidewall on your own car before drawing conclusions from anyone else's report.
Sep 2023AUAustralian deliveries in 2023; fitment varies by batch rather than by variant all variants
An Australian owner needed a full set of tyres at 43,000 km, and was not surprised, noting the car accelerates hard enough to chew through them. This is the real running cost that offsets the savings on brakes and servicing: an electric car with rear-wheel drive and instant torque wears tyres faster than an equivalent petrol hatchback, and the heavier variants worse again. Factor a set of tyres into your two-year cost rather than being surprised by it at the first service.
Jan 2025AUReported on an Australian Essence 64; applies across the range, more acutely to the heavier and more powerful variants all variants
Several owners whose rear discs looked badly corroded within the first few thousand kilometres traced it to the car sitting in a holding compound for months before delivery, where the unused discs rusted, rather than to anything they had done. Light surface rust usually scrubs off after a few firm stops (or a drive from a 100% charge, when regen is disabled), but discs left to corrode for a long period can end up pitted and scored so the rust never fully cleans off. One owner also found the same after leaving the car parked over holidays. It is corrosion from disuse, not pad wear.
Feb 2023GeneralRear friction discs rust while cars sit in storage pre-sale; can score if left badly corroded all variants
A recurring theme across years and markets is that this car reacts to tyre and balance imperfections other cars simply tolerate. A tyre specialist told one owner the MG4 was among the most sensitive cars he saw to any poor tyre fitting, and fitters advised two-point balancing that few shops can do. Tellingly, owners who could not afford premium tyres reported that fitting fresh budget tyres (Goodride, Falken) also completely cured the steering-wheel shake. That suggests the fix is a fresh, well-fitted, well-balanced set rather than any particular premium brand.
Feb 2024GeneralFirst-gen MG4, all trims; high sensitivity to tyre/balance quality, budget tyres can still cure the shake
Because standard balancing and even a dealer inspection can pass a tyre that still causes the vibration, owners repeatedly recommend a road-force (Hunter Roadforce) balance at a tyre shop that has the machine. In one case in Belgium the machine showed that three of the four tyres were defective. The machine can detect production faults and flat-spotting and prints a layout telling the fitter how to index each tyre on its rim. A quicker but cruder diagnostic several owners used was to have the dealer swap their wheels onto a smooth demonstrator to prove it was the tyres.
Dec 2023GeneralFirst-gen MG4, all trims; road-force balancing as the diagnostic that catches vibration causes
The fix owners settle on is either an all-season tyre such as the Michelin CrossClimate 2 or a better modern summer tyre, and both are widely reported to transform the car's wet and cold-weather confidence and stop the rear stepping out. One owner ran a detailed long-term test of the Bridgestone Turanza 6, itself a low-rolling-resistance tyre like the original, on a Standard Range car and found the same overall energy use as the factory tyres but far better and more predictable grip in the wet, at the cost of being slightly louder and roughly 500 pounds a set. All-season tyres are the popular choice for anyone facing a real winter, since the factory summer tyres are a poor match for a rear-wheel-drive car on cold, greasy or snowy roads.
Mar 2024GeneralResolution reached later in thread: named replacement tyres that fix wet grip without a range hit.
The original tyres are Chinese-market versions of familiar brands, and owners consistently rate them below the European-made tyre of the same name. Early UK Phase 1 cars came on 17-inch Chinese Continental PremiumContact C, later 18-inch cars got Chinese Bridgestones, and a run of late-2023 cars received a Chinese Bridgestone Turanza 5 that owners describe as poorly made, before MG moved on to other brands such as Maxxis and Kumho. Australian cars similarly received made-in-China Bridgestones. The practical point is that the badge on the sidewall does not tell the whole story, and replacing a worn factory tyre with the European-made version of the same model is often a clear step up.
Mar 2024AU+UKExtends KB #192 (brands vary): adds the China-market quality angle and the Conti to Bridgestone to Maxxis/Kumho rollout. all variants
MG's data table gives 2.5 bar / 37 psi front and rear at half load, and 2.5 bar front with 41 psi rear when the car is fully laden, on 205/60 R16 96H or 215/55 R17 95V tyres fitted to 6.5J x 16 or 7.0J x 17 rims. Two useful conclusions. Owners who have run around 40 to 42 psi to settle highway vibration are not running wildly high pressures by the manufacturer's own reckoning — that is essentially MG's laden rear figure. And this gives you a first-party reference to check a newly delivered car against, on a model where cars have arrived from the compound seriously under-inflated.
2023GeneralUK/EU training material, and the unit columns are internally inconsistent; covers 16 and 17 inch wheels only, not the 18 inch cars.
Periodically drop the regen level and do some deliberate firm braking to wipe the rear discs clean, because regen doing nearly all the retardation lets them corrode.
Jan 2023UK/EUall MG4 variants; worse in damp climates and low-mileage use
Because the electric parking brake acts on the rear calipers, doing the rear pads without a diagnostic tool means disconnecting the EPB motor and winding the spindle back by hand. An owner who did one side got a Parking brake force too low fault and had the parking brake working on the untouched side only, so had to park in P with chocks. The code self-cleared after two or three days of repeatedly applying the brake, but do one side at a time and use a shop with the EPB tool if you can.
date not establishedGeneralAny MG4 rear brake service; matters most if you use an independent workshop. all variants
An Australian owner reported his car came on the EV-specific Bridgestone Turanza T005 EV, a tyre first introduced in Taiwan, while another owner's car had Continentals - so the factory fitment is not consistent. He said he could not yet find that tyre on sale in Australia and worried it would make matching a single replacement hard; nobody on the page actually tried and failed to buy one. He also rated them much quieter than the Michelins he was comparing against, not against the Continental fitment. Check which tyre is actually on your car and confirm local availability before you need one in a hurry.
date not establishedAUAustralian-delivered cars fitted with Bridgestone rather than Continental tyres from the factory
An Australian owner reported the tyre pressure display showing negative values during charging, returning to normal once charging finished. This is a reporting quirk rather than anything happening to the tyres. If you see it while plugged in, check the values again after you unplug before worrying about it or letting a tyre shop chase it.
May 2025AUReported on an Australian car; variant not stated all variants
A small but persistent irritation: the tyre pressure display has no psi option, offering only bar or kilopascals, while every Australian service station gauge and most owners think in psi. The conversions worth memorising are that 36 psi is about 250 kPa or 2.5 bar, and 40 psi is about 275 kPa or 2.75 bar. There is no menu setting to change it.
Dec 2024AUReported on Australian cars; applies across the range all variants
The sealant in the supplied puncture kit has a shelf life and is a consumable, and an Australian owner reported MG charging $62.63 to replace it. Worth knowing for two reasons: it is a real running cost people forget about, and it puts the price of a space saver in perspective, since you will be paying for sealant repeatedly over the life of the car whether you ever use it or not. Check the expiry date on yours; expired sealant is not reliable.
2026AUAustralian service pricing; applies across the range all variants
Owners have noticed that a display option they used to have, choosing whether tyre pressures show in bar, PSI or kPa, disappeared after a software update, leaving the unit fixed. It is a small thing but frustrating if you check pressures in a different unit to the one the car now forces. There is no owner-facing way to bring the choice back, so if it matters to you, mention it to the dealer as a regression and, in the meantime, convert in your head or with a phone app.
2026UK/EUReported after a software update; applies across the range all variants
An owner who stripped all four brakes found the sliding pin rubbers completely dry and no copper grease on the pad contact surfaces. Repacking the pins with rubber grease and greasing the pad contacts stopped the rear parking brake sticking on and let the rear discs start wearing evenly again, so the earlier uneven, part-rusted band on the disc face gradually cleared. Light-use rear calipers on an EV are prone to seizing, and a factory that skipped lubrication makes it worse.
Feb 2023GeneralUngreased caliper pins/pad contacts from factory; regreasing fixed sticking rear brake and uneven wear all variants
Because the rear axle normally does most of its slowing through regen, the friction pads barely get used and the discs rust. One owner's tip: slip the car into Neutral now and then and brake with the pedal. In Neutral there is no regen, so the friction brakes take the full stop and the rear pads scrub the rust off the discs. It is a different route to the same result as braking from a 100% charge (which also disables regen).
Feb 2023GeneralNeutral disables regen so foot braking exercises rear friction pads to clear rust all variants
Against the early corrosion complaints, a high-mileage owner reported that at about 90,000 km the rear discs were still like new, with only minor and unremarkable wear on the fronts. It supports the view that once the early storage rust is worn off, the rear friction brakes on the MG4 do very little work and last a long time, so the alarming early appearance is not a sign of a short brake life.
Jul 2024GeneralHigh-mileage report of like-new rear discs at 90k km, tempering early corrosion worry all variants
The all-wheel-drive XPOWER comes on Bridgestone Turanza T005 tyres, an older design also made in China, rather than a modern performance tyre. For a car with this much power and torque, owners feel the factory rubber is a weak point and suggest fitting a genuine performance tyre such as a Michelin Pilot Sport 4S, Bridgestone Potenza or Continental SportContact if you want grip to match the drivetrain. This also feeds a separate, well-known XPOWER high-speed vibration complaint that some owners resolved by changing tyres.
Feb 2024GeneralXPOWER-specific: factory Turanza T005 is an older design; owners recommend a real performance tyre.
A dedicated owner poll on the main MG EV forum recorded roughly 79% of XPOWER respondents experiencing the steering vibration and around 89% wanting an official MG fix, with only about 11% reporting a clean car. This is not a handful of unlucky cars — if a dealer tells you yours is a one-off, the poll is public evidence otherwise. Owners report it in the 90-115 km/h band while cruising.
date not establishedAU+UKMG4 XPOWER, pre-facelift build
A long-running thread on vibration that gets worse above about 110 km/h, described as like driving over concrete slabs, never reached a single answer. The causes that came up were under-inflated tyres, including cars delivered from the dealer at the wrong pressure, an out-of-true or sawtooth-worn tyre, and an undertray not properly secured so that it transmits into the body. Check pressures against the door pillar label before anything else, since that costs nothing and was the cause for more than one owner.
Nov 2022GeneralReported on UK cars across trims from launch; variant not identified as a factor all variants
The most common cause owners pinned down for a rumble and steering-wheel vibration that begins around 80-90 km/h and worsens with speed was the original Chinese-made Continental tyres developing flat spots or deformation ridges while the car sat for weeks at the docks and on the boat. In several cases a technician pulled a tyre and showed visible ridges running across the inner carcass. Swapping wheels onto a smooth demonstrator (or vice versa) isolated the tyres, and fitting any fresh set made the rumble disappear. The same pattern turned up in the UK, the Netherlands, Belgium, Turkey and Australia, so it is not a one-off.
Nov 2022GeneralFirst-gen MG4, all trims; shipping-induced tyre flat spots as the leading cause of highway rumble
Separate from tyre flat spots, several owners found the factory wheel balancing was badly out. One owner's tyre fitter recorded three of the four wheels well off (weights out by 20-30 grams on multiple positions); another dealer described the wheels as 'miles out'; an Australian Long Range had its rears found a long way out at the 1000 km check. A proper rebalance made a large difference or fully cured the vibration in these cases, which points to slack quality control at the factory rather than a design flaw.
Nov 2022GeneralFirst-gen MG4, all trims; poor factory wheel balancing as a distinct cause of highway vibration
Technical Information TI-20240321-EH32, issued by SAIC Motor International for all overseas markets, states plainly that the XPOWER can produce a vibration felt through the steering wheel and the seat at around 110 km/h, and that not every car does it. MG's engineering explanation is that at speed the driveshafts act as an excitation source and the vibration is carried into the seat and wheel through the body structure. The prescribed order of investigation is: set the tyre pressures to the recommended values and retest; road-force test the tyres and replace any that fail; fit the steering wheel damper and retest; and only for customers still complaining severely after that, consider the revised suspension parts. This is the document to name if a dealer has told you the shake is normal, cannot be reproduced, or that nothing exists for it.
Mar 2024GeneralTI-20240321-EH32SAIC Motor International bulletin marked for all overseas markets; XPOWER only, not the two-wheel-drive cars.
The same MG bulletin goes further than the steering wheel damper. It says the engineering team evaluated a new suspension solution that meets the expectations of customers most sensitive to vibration, and lists the parts involved: revised left and right rear mounts, a revised front upper mount crossmember and a revised rear suspension frame. MG is careful about it - the work is described as technically demanding, recommended only for individual customers with severe complaints, and explicitly not suitable for a blanket service campaign. Two production breakpoints are given: the steering wheel damper went into build on 15 October 2023 and the revised suspension on 21 February 2024, so an XPOWER built after that date should already have both. For an owner who has had the damper fitted and still feels the shake, this is the documented next step rather than the end of the road.
Mar 2024GeneralSAIC Motor International bulletin for all overseas markets; XPOWER only.
Bulletin SI-TB2024011601 describes the steering wheel damper repair in detail. The dealer first confirms the complaint and checks that the car was produced before the 15 October 2023 breakpoint - after that date the damper is factory-fitted. The airbag comes off, the old horn mechanism (three bolts) is removed and a new damped assembly, part number 11623528, goes in its place; it is a 0.4 hour warranty job claimed under fault code 36 (VIBRATES), and MG restricts it to all-wheel-drive cars. One line in the bulletin is worth knowing: MG warns that the springs and rubbers in the new part can shift out of position in the packaging, and shows which positions are right and wrong. A damper assembled with a displaced spring is a plausible reason why some owners report the fix made no difference.
Jan 2024UK/EUMG Motor Europe bulletin, AWD (XPOWER) only; the part number and breakpoint are corroborated by the international bulletin.
MG spells out what is serviceable in the suspension, and it cuts both ways. Not separately replaceable: the anti-roll bar bushings and their clamps, front and rear — the bushes are vulcanised onto the bar and the clamps are fitted with special tooling, so a worn bush means an anti-roll bar assembly; and the ball joints in the anti-roll bar links, so a knocking link is a new link rather than a repair. The front strut upper mounting support is a single assembly that cannot be split, although its top bearing can be changed on its own. Separately replaceable, on the other hand: the front lower control arm's ball joint and its rear bush, so a worn front ball joint need not mean a complete new arm, and the rear trailing arm's hollow rubber bush. MG also notes that coil springs vary with the powertrain and specification and are identified by a colour code painted on the coil, so a replacement spring has to match rather than being generic to the model.
2023GeneralServiceability statements from MG's UK/EU training material; component design is common to the model, though parts supply differs by market. all variants
For the complaint MG calls "vehicle jitters during driving", the manufacturer's ordered check list is: the tyre tread, looking for an uneven surface or something embedded in it; then whether the wheels are still within the allowable dynamic balance range; then the front suspension springs; and only last, the front dampers. The manufacturer is saying plainly that a shaking MG4 is a tyre and wheel-balance problem until proven otherwise. That is exactly what MG4 owners worked out for themselves after chasing highway vibration for months, and it is the strongest argument for insisting on a proper wheel balance and a hard look at the tyres before anyone opens up the suspension.
May 2022GeneralMG4 EV Guided Fault Finding, Suspension System, Vehicle Jitters During Driving (p66) and Body Shaking (p74) - UK/EU document all variants
For abnormal noises while driving, the front suspension procedure runs in a deliberate order: the front anti-roll bar bushing, then the anti-roll bar link, then the lower control arm ball joint, then the control arm rear bushing, then the wheel hub, then the damper, and last the subframe. The two cheapest and most accessible parts on the car come first and the most expensive comes last. So a knock or clonk over bumps from the front of an MG4 is, on MG's own expectation, most likely a worn anti-roll bar bush or drop link - parts that are inexpensive and quick to change - rather than a damper or hub. That is a useful thing to know before accepting a large quote.
May 2022GeneralMG4 EV Guided Fault Finding, Suspension System, Abnormal Noises During Driving (p68) - UK/EU document all variants
The rear suspension abnormal-sound procedure has nine steps and opens with the rear upper swing arm bushing, then the rear lower swing arm bushing. Only after those does it look at the damper leaking oil, a loose rear hub, the anti-roll bar link and its rubber bushing, the lateral push rod bushing, the trailing arm bushing, and finally a loose rear subframe. MG4 owners have been reporting a clunk from the rear - often the left side - over speed bumps and when moving off, and this is the manufacturer stating what it expects that to be: worn rear arm bushings first, everything else after. A loose rear hub and a loose subframe both being on the list is also worth noting, because those are checks rather than parts.
May 2022GeneralMG4 EV Guided Fault Finding, Suspension System, Abnormal Sound, rear (p72-73) - UK/EU document all variants
For an oil leak from the electric drive transmission - the single-speed reduction gearbox that sits with the motor - MG lists exactly four sources and works them in order: the driveshaft (axle shaft) oil seals worn or damaged, the drain plug gasket damaged, the joint face where the two halves of the drive unit housing meet, and the seal ring on the cooling water pipe fitting. That is worth having, because MG4 owners in the UK reported reduction gearbox oil leaks that went months without a settled explanation before a breather modification emerged as the fix. MG's May 2022 manual predates that and does not mention the breather at all - its expected causes are all seals and gaskets. So if you have an oil weep from around the drive unit, there are two separate conversations to have with a dealer: the seal and gasket list here, and the later breather modification.
May 2022GeneralMG4 reduction gearbox oil leak sources; source is a UK/EU repair-information release. Filed under drivetrain for want of a closer topic. all variants
Owners have reported clicking or knocking from the front when turning, and MG has a documented cause list for exactly that. Noise from the steering gear or from the column is expected to come from, in order: loose steering gear retaining bolts, a worn rack, loose upper steering column retaining bolts, and finally an upper steering column that is poorly lubricated or worn. Two of those four are simply bolts that have worked loose, which is a cheap fix and a plausible explanation for a noise that appears, stays roughly constant and never turns into a failure. The last one - a dry column - is also a lubrication issue rather than a broken part. If a dealer tells you a steering noise cannot be found, this is the sequence they are meant to have worked through.
May 2022GeneralMG4 Electric first generation; UK/EU documentation, mechanical cause list is a vehicle fact all variants
The highway shake that MG4 owners have argued about for years has a manufacturer cause list, and it is short. For a car that jitters while driving, MG says check the tyre tread is smooth and free of anything embedded in it, then check the wheels are dynamically balanced within tolerance, then look at whether a front spring has lost its rate, then check the front damper for leakage or damage. Nothing else is on the list. That is first-party support for what owners worked out themselves: the vibration is overwhelmingly a tyre and balance problem, not a mysterious chassis defect, and a proper balance or a fresh set of tyres is the sensible first spend. The related complaint of uneven tyre wear starts with tyre pressure and balance too, with wheel alignment checked only at the very end.
May 2022GeneralMG4 Electric first generation; UK/EU documentation, symptom-cause list is a vehicle fact all variants
MG's vibration analysis table sorts every felt or heard vibration by two questions before any part is touched. First, is it sensitive to road speed or to motor speed. Second, and the one an owner can answer on any quiet stretch of road, does it still happen when you coast in Neutral. A vibration that persists while coasting in Neutral points MG's own diagnosis at the tyres and wheels. One that changes with torque, load or steering input points instead at the driveshaft or suspension. On an MG4 that first branch is powerful, because so many highway rumble and shudder complaints on this car turn out to be tyres or wheel balance. Doing the coast test yourself, safely and on a level road, and reporting the answer, aims the dealer at the right half of the car before the wheels come off.
2022GeneralMG4 EV first-generation; physical diagnostic principle, not market specific all variants
MG classifies vehicle noise into named bands and ties each to a likely source. A deep boom or drone in the 20 to 60 Hz range, described as a bowling ball down an alley, is road-speed related and may come with no vibration you can feel at all. A moan or drone at 60 to 120 Hz sits with a perceptible surge. A howl runs 120 to 300 Hz. A whine at 300 to 500 Hz - MG's own comparisons are mosquitoes, turbine engines and vacuum cleaners - is road-speed sensitive, changes with torque or load, and is listed against the transmission. On an MG4 the transmission is the single-speed reduction gearbox, which is exactly the part owners have had oil-leak and noise trouble with. Describing what you hear in these terms, and saying whether it changes when you lift off or accelerate, routes the diagnosis far faster than reporting a general noise.
2022GeneralMG4 EV first-generation; noise classification principle, not market specific all variants
There is a whole page on vibration complaints that cannot be reproduced, and it reads as a list of excuses that owners can pre-empt. MG says tyres develop a flat spot after standing and cooling, and that tyres harden when cold so irregular wear shows up far more obviously than once they are hot - so a car driven across town to the workshop may already be too warm to demonstrate the fault. It also notes the opposite: a car left standing in the cold may never reach operating temperature during the attempt. Then the practical ones. The problem may only appear with the car loaded, or towing, and the car is usually empty when they try to reproduce it. And the road matters: the test route near the workshop may be nothing like the road you actually drive on, and MG accepts that the customer may only meet the vibration on one particular road. If your vibration is real, ask for a cold first-drive-of-the-day test, loaded the way you normally load it, on your road with you in the car.
2022GeneralMG4 EV first-generation; physical reproduction conditions, not market specific all variants
MG's first suspect for a knock from the front suspension is the anti-roll bar bushing - but the bushes are vulcanised onto the bar as a single piece and the clamps are pressed on with special tooling, and the manual states plainly that neither can be taken apart or replaced on its own. The rear bar is written up the same way. So the cheap-sounding fix of 'just doing the bushes' does not exist on this car: it is a new bar. The drop links are the same story, since their ball joints are not serviceable and a rattly link means a new link. The converse is worth knowing too, because it is where the money is saved: MG does allow the front lower arm's ball joint and its rear bush, the trailing arm bush and the bearing in the top of the front strut to be replaced individually, so not every suspension complaint is a whole-assembly bill.
Jul 2023GeneralFront and rear anti-roll bars; a design characteristic of the car all variants
Unusually for a modern car, MG documents the driveshaft as a repairable assembly rather than a throwaway one: there are separate remove-and-refit procedures for the inner tripod joint, the tripod boot, the outer constant velocity joint and the CV boot, each with new clamps, a new circlip and fresh grease. So a torn boot or a clicking joint is, on paper, a parts-and-grease repair rather than a complete shaft. The catch is what it takes to get the shaft out: the rear wheel bracket has to be freed from five separate suspension links, every one of those bolts and nuts is single-use and thrown away, a special puller separates the shaft from the drive unit, and the axle nut is a new one tightened in a three-stage sequence. That is why a 'small' boot job can still come back as a substantial quote, and why some workshops will simply fit a complete shaft instead.
Jul 2023GeneralFront axle shafts exist only on the four-wheel-drive car; the rear shafts are common to all.
Beyond the steering damper, MG authorised a much larger hardware job owners call the "Stage 2" fix: front cross member, all four motor mounts and the rear subframe, the stated purpose being to change the angle of the driveshafts, which are named as the excitation source of the vibration. Results are genuinely mixed — one Australian owner reported his car fixed and still fine on the freeway well afterwards, following a job involving motor removal, subframe replacement, bushes and fluids over about three days; another Australian member is reported to have had the fix without it curing the problem, and UK members say there is now evidence it doesn't work. Some UK owners had parts delivered to the dealer and then had the authorisation withdrawn by MG before work started.
date not establishedAU+UKMG4 XPOWER, pre-facelift cars with the 100-120 km/h steering/seat vibration
A thread asking whether one single XPOWER owner had had the vibration fixed produced no success story. The Australian owner who started it had already had the steering damper fitted and was still vibrating hard at 10,000 miles, with a road-force test proposed next; others put it down to a design flaw that would be expensive to cure properly. The nearest things to relief were new tyres and about 40 psi cold pressures — which one UK owner said made all the difference while the Australian owner found they changed nothing — and one owner whose onset speed drifted from around 65 mph to around 80 mph as mileage built up. Treat the damper as a first step, not a fix, and keep the job open with the dealer afterwards.
Aug 2024AU+UKMG4 XPOWER cars that received the revised steering damper
An Australian owner petition launched in March 2024 makes the point that buyers only discovered the vibration after purchase because typical test drives do not reach sustained highway speed, and describes long-distance travel in affected cars as unpleasant to unbearable above 100 km/h. If you are buying a used pre-facelift XPOWER, insist on a highway leg at 100-120 km/h held steady for several minutes, not a suburban loop.
Mar 2024AUBuying or test-driving a pre-facelift MG4 XPOWER
Owners describe a distinct, separate event: hard acceleration in Sport from roughly 65 to 110 km/h followed by a sudden throttle lift produces a violent shudder through the whole car for a second or two, as if the rear axle went to full regen while the front was still driving. It is intermittent and did not reproduce on demand, and community opinion leans toward a motor-control or torque-handover software glitch rather than wear. Note the exact conditions if it happens — no dealer diagnosis has been documented.
date not establishedUK/EUMG4 XPOWER dual-motor, Sport mode, hard acceleration then abrupt lift-off
Four UK owners in one Feb 2026 thread report front lower suspension arm bushes splitting or debonding well inside warranty: an MOT major fail at 22,000 miles with both bushes debonded, cracked bushes found at a second service at 12,000 miles, and worn bushes at 18,000 miles with a non-warranty quote of GBP750 to replace them. A forum moderator states ball joints and bushes are covered for 36 months, so push for warranty — though one owner waited four months while MG insisted on a re-inspection three months later. Do not wait for a noise: the owner who failed his MOT had no suspension noises and normal handling, and a 45,000-mile car in the same thread was fine, so ask for the bushes to be inspected specifically at each service.
Feb 2026UK/EUMG4s past roughly 12,000 miles on poor road surfaces; both front lower arms, vertically-mounted bush
An owner reported a quiet but definite whine from the rear when accelerating or under regenerative braking, most obvious just under 40 mph and lost in road noise above that. An experienced member explained it as the inverter chopping DC into AC for the motor — "totally normal and nothing to worry about" — and several others confirmed every EV they have owned makes a mild whine or whizz. No dealer fix was offered and none was thought necessary. Note this thread does not discuss the reduction-gearbox oil-leak fault at all, so don't read it as ruling that out; the owner simply checked for a leak and found none.
Sep 2023GeneralSteady electronic whine from the rear that rises and falls with speed, loudest around 35-40 mph
A whistle or roar that appears somewhere between about 50 and 80 km/h and grows with speed is most often the small fixed quarter light window not being properly sealed, rather than the door seal or the mirror. Owners are clear it is a fault rather than a characteristic, but dealer response has been inconsistent: several were told no service bulletin exists, while at least one owner had the quarter light replaced. The workaround owners use is residue-free tape around the quarter light edge, which noticeably reduces it.
Oct 2023UK/EUReported on UK cars across trims; variant not identified as a factor all variants
Several Australian owners describe a click or tick from the front of the car, one specifically when turning right and traced towards the steering column, another suspected to be a wheel bearing at eighteen months. The useful data point is longevity: one owner first noticed the ticking at around 20,000 km and reported it unchanged at 80,000 km, with no deterioration. That does not make it right, but it suggests that in at least one case it was a noise rather than a failure in progress.
2026AUReported by Australian owners; variant not identified as a factor all variants
For owners chasing the highway vibration that has never been definitively resolved, one approach that has helped is running pressures higher than placard, around 40 to 42 psi. It is a trade: higher pressure firms up the ride and can change wear patterns, but several owners report it noticeably quieter and smoother at speed. Combined with the fact that many cars are delivered badly under-inflated, pressure is the first and cheapest variable to work through before anything mechanical is suspected.
Dec 2024AUReported by Australian owners; applies across the range all variants
Owners note the rumble and vibration only appear once you are holding a steady speed above roughly 90-100 km/h; it is absent in town and in slower traffic. One Australian owner said even a dealer test drive could miss it because you have to be cruising at highway speed for several seconds before it builds. Another buyer confirmed the problem never surfaced around town and only appeared once he got onto the motorway two months into ownership. That makes it easy to overlook when buying, especially a used car.
Dec 2023GeneralFirst-gen MG4, all trims; vibration is highway-speed-only, easy to miss on a short test drive
An Australian owner and former mechanic describes it not as a wheel-balance wobble but as a drone resonating through the steering wheel that appears in a specific frequency window — absent below about 90 km/h, present roughly 100-120 km/h, and gone again above about 120-140 km/h. That speed-window behaviour is the useful diagnostic: a wheel or tyre imbalance gets worse with speed, this does not. Note the speed and whether it disappears again when you report it.
Mar 2024AUMG4 XPOWER at Australian highway speeds
On the main vibration thread a forum member repeats the community's second-hand belief that XPOWERs built after October 2023 do not have the vibration, wording it explicitly as "we've been led to believe", and tells a new owner his brand-new car "should have been made after Nov 2023, so should be vibe free". That new owner reported no vibration over 60 mph on a first short drive. This is owner hearsay, not an MG statement, and no one in this discussion says anything about the facelifted car — so treat it as a build-date question worth asking a used seller, nothing more. Ask for the build date, not just the model year.
date not establishedAU+UKUsed MG4 XPOWER purchase; pre-facelift versus facelift
A French owner took the MG technical bulletin to his dealer, who replaced the motor mounts under warranty, after which he reported the car no longer vibrated at all. This is the clearest documented success in the public threads and it followed handing the workshop the bulletin rather than describing the symptom. Photographs of the removed mounts numbered to match the bulletin were posted alongside.
Dec 2024UK/EUTI-20240321-EH32MG4 XPOWER with high-speed vibration, dealer working from TI-20240321-EH32
Australian owners reported cases of a car abruptly limiting speed when accelerating above about 90 km/h with the battery somewhere around 20 to 30 percent, with the suspected cause being transmission fluid leaking into the motor and the remedy a full motor and gearbox replacement. This appears to be rare rather than a pattern, but it is the kind of failure worth recognising: a sudden loss of available power at speed is not normal behaviour at that state of charge and should be reported immediately rather than driven around.
Jul 2023AUReported on Australian cars in 2023; variant and build range not established all variants
Early UK reporting described reduction gearbox seal failures leaking oil, characterised by those tracking it as a design problem rather than isolated defects, with workarounds attempted over five months or more rather than a resolution. Related reports of transmission fluid finding its way into the motor and requiring a complete motor and gearbox replacement have surfaced in Australia too. This is not a common failure, but oil anywhere near the drive unit is worth taking seriously rather than watching.
Mar 2023UK/EUReported on early UK cars with related Australian reports; build range not established all variants
The acoustic vehicle alerting system that makes the car audible to pedestrians stops below a certain low speed. That is how these systems are designed and it is common across electric cars, but it means the car is silent exactly when creeping through a car park or reversing slowly, which is where people step out in front of you. Australian owners note it; the practical response is to assume pedestrians cannot hear you at walking pace, because they cannot.
2026AUReported on Australian cars; applies across the range all variants
Diagnose a faint driver-side dash buzz by gently pulling the top of the infotainment screen towards you while driving - if the noise stops, the screen's mounting clips are the source.
Feb 2023 – Sep 2024UK/EUall MG4 variants
Five to seven SE and Trophy owners report fog inside the rear light covers, and the common reply is that they all do it and it clears in the warmth, eventually — one poster's explanation is that the clear outer cover is not watertight and probably has breather holes in the bottom, with the sealed LED cluster behind it unaffected. Treat that as a theory rather than a finding: others in the same thread argue it means moisture is getting in and the seals are not doing their job. A body shop told one owner it happens on some cars, Teslas being the worst. Do not drill holes in the light units, and do photograph pooled water rather than light mist, since standing water is a different and fixable problem.
Jan 2023GeneralAll MG4 rear light clusters, worst in cold damp weather after washing
The recurring pool of water under the boot floor usually gets in through the one-way cabin air-extraction vents hidden behind the rear bumper in each rear quarter. Rain runs down the tailgate gutter, is deflected by the rear light cluster and reaches these vents; when the soft foam gasket behind a vent frame is dirty, badly seated or has aged and distorted, water seeps past it, pools in the spare-wheel/tool well and then spills into the main boot. It is the same failure long known on cars like the Ford Focus. One owner confirmed it by removing the rear light cluster and watching water trickle straight through the vent cut-out, and MG dealers have treated it as a known fault needing bumper removal and resealing.
Feb 2024GeneralFirst-gen hatch body; entry via rear-quarter extractor vents behind bumper all variants
When it leaks, the water collects in the lowest part of the boot, under the polystyrene tray holding the tyre inflator, sealant canister and tools, where it is easy to miss until the tray is lifted out. Owners have found anything from about a centimetre deep to a coke-can's worth to close to a full litre, enough to soak the boot carpet and, in worse cases, migrate forward into the rear seat base and rear footwell carpet. Owners over three years into ownership have discovered they were affected without ever noticing dampness before.
2024GeneralVolume and spread of ingressed water under the boot floor tray all variants
Separate from the older side/quarter-light wind noise, many owners describe a whistle that clearly comes from the FRONT of the car, starting around 40 mph (about 65 km/h) and worsening at higher speeds. The tell-tale is that it is loudest with the air-conditioning off and drops dramatically the moment you switch the AC on. One owner taped a microphone behind the number plate and confirmed the noise originates at the front intake area, pointing to the active grille shutter behind the bumper: it whistles most when the flaps sit part-open (mild weather), and goes quiet when they are fully open in hot weather or fully shut in the cold. That also explains the AC link, since running the AC changes how the grille flaps sit.
May 2026GeneralFront-end 40 mph whistle from active grille shutter; AC-on reduces it all variants
The common dealer response is to reseal or replace the small triangular (quarter-light) window seal, but owners repeatedly report it makes no real difference. One had the driver's-side seal done and heard no change; another had the triangular window seal replaced and it was still just as loud, with a second seal then ordered; a third had the whole window replaced and it still whistled at 40 mph. If your noise is actually the front/active-grille type, a side-window seal swap was never going to fix it, which is part of why these repairs disappoint.
May 2026GeneralDealer quarter-light/window seal replacement frequently fails to fix wind noise all variants
MG's anti-perforation cover runs seven years against corrosion rusting right through a body panel from the inside out, and it names the panels it applies to - bonnet, roof, boot lid, tailgate, front wings, rear quarters, doors, sills, pillars and underbody. But it is explicitly conditional: the car must be inspected annually by an authorised MG repairer throughout the period, with an MG Corrosion Warranty Annual Inspection Sheet filled in and the record stamped, and an incomplete inspection record is listed as an exclusion. The MG4 maintenance check sheet builds this in - an annual corrosion and cosmetic inspection is one of the after-every-service items. The owner action is simple and easy to miss: when you collect the car from a service, check that the corrosion inspection sheet has actually been completed, not just the service stamp.
Oct 2021UK/EUAnti-perforation cover and its annual inspection condition; UK statement, echoed in the MG4 check sheet. all variants
MG's April 2024 bulletin states that water can get into the boot because of improper sealing, and sets out the repair. The rear bumper comes off - sixteen screws into the wheelhouse liners and brackets, a black cover, four more screws and the electrical plugs - and the technician then brushes self-adhesive sealer down into the hollow cavity from top to bottom, checks that every hole and gap in that area is covered and that no residue is left around it, and refits the bumper. It is booked at 0.4 hours under fault code 42 (LEAKS). Note what MG identifies as the cause: a sealing gap in the body structure behind the bumper. That is not quite the same as the air-extractor vent flaps that owners most often blame, so a workshop that only reseals the vents has not done this bulletin.
Apr 2024UK/EUMG Motor Europe bulletin; the repair is body sealing behind the rear bumper, quoted at 0.4 hours. all variants
The cabin is fitted with pressure relief valves that let air out when you close a door or the blower pushes fresh air in, so the pressure equalises and your ears do not pop. MG states there is one at each side of the boot, and that they discharge into the covered space between the body and the rear bumper. Each is a grille covered by a soft rubber flap acting as a one-way check valve, whose opening automatically adjusts to the pressure difference between the cabin and outside. That is exactly the location and mechanism owners diagnosed as the usual entry point for water in the boot — and this is manufacturer confirmation that they are one-way rubber flaps in the body, not sealed panels. If a flap is distorted, contaminated or poorly seated, there is a direct path into the car. It also explains why the doors need a firmer push to close than owners expect.
2023GeneralRelief valve design and location from MG's UK/EU training material; a body design characteristic common to the model. all variants
For one window that has gone dead, MG's order of investigation is worth knowing because the cheap causes come first. After a look for anything obviously jammed or damaged, step two is the power window fuse, and step three is the window regulator cable, checked for having come off its track or broken. Only after those does the manual move to the switch, then the wiring, then the motor, and finally to reflashing the body computer. The window motors are not simply switched on and off by the button either - they sit on a network that reports back to the body computer, which is why software on that module is the last thing MG looks at and why a power interruption can leave a window behaving oddly until the system re-establishes itself.
May 2022GeneralMG's documented diagnostic order for a single inoperative power window; UK/EU-published manual. all variants
For a front washer that sprays insufficiently, MG works from the outside in: the washer nozzle itself for blockage or damage, then the short hose behind the nozzle, then the hose back to the reservoir, and only when all three are eliminated does it conclude the pump has failed. That ordering is the manufacturer confirming what owners have found - a poor spray on this car is usually the jet, not the pump. A blocked or misaimed nozzle is something you can inspect and often clear yourself with a pin and a squirt of water before anyone charges you for diagnosis.
May 2022GeneralMG4 EV Guided Fault Finding, Front Washer Sprays Insufficiently (p104) - UK/EU document all variants
MG lists condensate leakage from the air conditioning as its own symptom, with just two expected causes: a drain pipe that has come off, split or blocked, and a damaged air conditioning box housing. In normal running the aircon produces a steady trickle of water that is supposed to leave the car through that pipe and drip onto the road - the puddle under a parked car on a hot day. If the pipe blocks or falls off, that water backs up and comes out inside, typically as a damp front footwell and fogged glass. It is worth knowing this exists as a distinct fault, because MG4 owners have a well-known water problem in the boot, entering through the vents behind the rear bumper. Wet carpet at the front of the car, especially in hot humid weather with the aircon working hard, is a different diagnosis with a different and much cheaper fix.
May 2022GeneralMG4 cabin water ingress from the climate system; source is a UK/EU repair-information release. all variants
When MG's own technicians work through a complaint of front wipers that do not move at all, the very first mechanical thing they are told to confirm - before fuses, relays, the stalk switch, the motor or any wiring - is that the bonnet is fully closed, and then that the bonnet's own touch switch is not damaged. The car deliberately inhibits the wipers when it believes the bonnet is up, presumably so the arms cannot sweep into a raised bonnet. The practical consequence for an owner is that wipers which suddenly stop working entirely are worth a bonnet slam and a second look at the latch before you book anything, and that a failed or misaligned bonnet switch will kill your wipers with the bonnet perfectly shut. It is a free thirty-second check that sits ahead of a diagnostic fee.
May 2022GeneralMG4 Electric first generation; UK/EU service documentation, mechanism should not differ by market all variants
MG has a separate diagnosis for wipers that do not return to their parked position, and for wipers that judder or make a noise as they sweep. In both cases the causes MG expects are mechanical and cheap: a bent wiper arm, loose or missing retaining bolts on the arm, a deformed or loose linkage mechanism, or loose bolts on the motor mounting - with the motor itself only suspected once all of that has been ruled out. This matters because owners have separately noticed that the washer jets can end up blocked by where the wiper arm sits when parked. MG's own material says the park position is set by hardware that can work loose, so a wiper that has drifted out of position is a fixable fitting problem rather than something to live with.
May 2022GeneralMG4 Electric first generation; UK/EU documentation, mechanical fact unlikely to differ by market all variants
The manual separates wind whistle, wind roar and wind rush. A whistle is air escaping past a leaking seal, because at highway speed the cabin is at slightly higher pressure than the outside air. A roar is air passing over or through a gap between two body panels, and MG's stated correction is to adjust the panel alignment. Wind rush is air flowing over the shape of the car, and is a function of its aerodynamics. Crucially, MG says whistle and roar are eliminable, and that both must be eliminated before anyone concludes the noise is wind rush. So if a dealer tells you the noise you hear at 100 km/h is just how the car is, the manufacturer's own order of work says that verdict is only available after the seal and panel-fit causes have been ruled out. MG also states most wind noise is caused either by leaking seals or by misaligned body surfaces, which is a long way from an unfixable design characteristic.
2022GeneralMG4 EV first-generation; body sealing and aerodynamics principle, not market specific all variants
The prescribed method for analysing a reported wind noise is a road test on a normal flat straight road driven north, south, east and west in turn, on a route with little traffic and low background noise, at whatever speed makes the noise most obvious. The reason is crosswind: a leak that only sings with the wind on one side of the car will be silent in the other three directions, which is precisely why an owner's whistle so often refuses to appear on a quick run round the block with a technician. MG also asks for the details to be recorded first - where the noise seems to come from, where it is loudest, when it happens, the vehicle speed, the fan speed, and the window positions - before any inspection. If you are reporting a wind noise, arriving with those details written down, and asking whether the four-direction test was performed, is the single most useful thing you can do.
2022UK/EUMG4 EV first-generation; UK/EU RMI workshop procedure, Australian dealer practice may differ all variants
In the preamble to the water leak tests the manual states that the car is designed to work under normal environmental conditions, that the sealing materials and components are specified to withstand the natural elements, and that those specifications cannot take account of artificial conditions - with high pressure car washes given as the example. The whole leak test procedure is then described as correlated to natural rainfall, not to a jet wash. This matters for anyone chasing water in the boot or a damp footwell: if the leak only ever appears after a high-pressure wash, MG's own documentation says the seals were never specified for that, which weakens a warranty argument. It also means a leak that shows up in ordinary rain is the one worth pressing, because that is the condition the car is supposed to survive.
2022GeneralMG4 EV first-generation; statement about the car's sealing design, not market specific all variants
The water leak section carries an explicit warning against the obvious conclusion: if a leak is found around the door, window, trunk lid or liftgate, that does not necessarily indicate a poor weatherstrip, and an adjustment to the area may resolve the condition on its own. For MG4 owners with boot water this is important, because the usual dealer response is a new seal or a sealant kit, and owners repeatedly report those not holding. MG's own hierarchy puts panel and closure alignment ahead of replacing rubber. The same idea runs through the wind noise section, where misaligned body surfaces sit alongside leaking seals as a primary cause. If a replacement seal has already failed to cure your leak, asking about tailgate or door alignment is asking for the step MG documents rather than a repeat of the one that did not work.
2022GeneralMG4 EV first-generation; body sealing principle, not market specific all variants
MG specifies a proper water leak test, not a hose-over. Two spray stands are assembled either side of the car with overlapping coverage, the water pressure at the nozzle is to be held at 155 kPa for at least four minutes, and an assistant must sit inside the car throughout to spot where the water actually appears. The manual even sets the spray angles for each area - aimed down and rearward for the windscreen corners and the side glass, down and forward for the rear window. There is also a simpler water hose test, which starts at the base of the glass and moves slowly upward and across the roof, and an air hose and soapy water test for finding the entry point once the general area is known. If you have been told a water test was done and found nothing, it is entirely fair to ask which of these was performed, for how long, and whether anyone was inside the car.
2022UK/EUMG4 EV first-generation; UK/EU RMI workshop procedure, Australian dealer practice may differ all variants
MG treats dust ingress as a separate problem from water ingress, and says so directly: dust may leak into the vehicle where water will not, particularly into the lower part of the interior, because forward motion creates a slight vacuum that draws air and dust in through gaps that water cannot pass. The documented method is to strip the carpet and floor insulation, drive the car on a dusty road, then look for a small cone or slit of dust at each entry point, mark them, and confirm by shining a lamp under the floor and cowl while someone inside marks where light comes through - checking weld joints and body mounts as they go. Leaks are then sealed with an air-drying body sealer. For anyone driving unsealed roads regularly, a persistently dusty boot or footwell is worth reporting as a body sealing fault rather than shrugged off, and this is the procedure that finds it.
2022GeneralMG4 EV first-generation; general body sealing principle, particularly relevant on unsealed roads all variants
MG lists "horn keeps honking" as a symptom in its own right, and after the horn relay the next thing checked is the horn contact switch that sits between the driver's airbag and the steering wheel, looking for erosion or a poor connection. The same contact appears in the list for a horn that will not sound at all. Two things follow for an owner. It explains a horn that goes off on its own, sounds when you turn the wheel, or needs an unreasonably hard press - the problem is a contact inside the steering wheel rather than the horn unit behind the bumper. And it means the repair involves removing the driver's airbag, which carries pyrotechnic handling procedures, so it is not a driveway job. It is also worth raising if a horn fault appears soon after any steering wheel, airbag or clock spring work.
May 2022GeneralMG's expected cause for a self-sounding or dead horn; UK/EU document, component layout not market-specific. all variants
MG's routine for a stuck window regulator has only two steps, and neither involves a scan tool. First, check the glass guide rail for anything jammed in it, or for deformation or damage. If that is clear, MG says the window glass run channel weatherstrip - the rubber channel the glass runs in - may be fouled by foreign matter, deformed or damaged, and expects the system to work normally again after cleaning or replacing it. That is the manufacturer saying that a window which is slow, judders, stops part way or keeps tripping its anti-pinch is most often the rubber rather than the motor or the regulator. Cleaning the channels out, including their inner faces, and keeping grit and leaf litter from collecting in them is something an owner can do before paying for a diagnosis, and it is the cheapest thing on the list by a wide margin.
2023GeneralWindow regulator diagnosis from MG's UK repair information; a mechanical cause that does not vary by market. all variants
MG states plainly that the MG4 shell mixes ordinary steel with high-strength and ultra-high-strength hot-formed steel, and that repairs may only be carried out following its own service instructions using modern inverter welding equipment. The rules that follow are restrictive: energy-absorbing zones must not be cut at all, nothing may be cut within 50 mm of a laser weld, sections with built-in reinforcement must not be cut, single-sided spot welding is prohibited, and braze and gas welding are banned unless the factory used them. Straightening is equally constrained - the pull must be done in stages with the stress relieved between them, and MG warns that the only fix for an over-stretched panel is to replace it. For an owner this is the difference between a repairable car and a write-off, and it is a fair question to ask an insurer: is the nominated repairer equipped for hot-formed steel and inverter resistance spot welding, or will it be pulled and filled by a general panel shop.
Jul 2023GeneralApplies to all first-generation MG4 bodyshells; collision repair method, not a fault
The leak-finding section contains a genuinely useful trick that costs nothing. Before chasing seals, look at the colour of the water that has collected: MG says dirty water means the leak is coming from under the vehicle, and clean water means it is coming from above. It also insists on working from the lowest point upwards, because testing a high point first floods lower areas and hides where the water actually got in - it gives the example of spraying the windscreen and then wrongly blaming the windscreen seal for water that ran through and dripped by the pedals. The recommended kit is a hand garden sprayer, a torch and a mirror, not a pressure washer. Given how common boot and rear-floor water is on this car, this is a sensible first step before booking it in.
Jul 2023GeneralGeneral leak diagnosis method published by MG for this car all variants
MG gives temperatures for the adhesive work that leak repairs depend on. A door weatherstrip is stuck down in a fixed position, and the manual says the ideal temperature for it is 25 degrees Celsius, with the bonding on the door or any other sealed location becoming worse below 18 degrees. The same 18 degree floor is set for cavity wax injection and drying. It also says the strip must not be pressed on too hard, and that if a seal has to be re-stuck the mating face must not be touched or contaminated. This is a plausible part of why owners report the documented boot-leak sealant fix failing and needing to be done again: an adhesive repair carried out in an unheated workshop in winter starts at a disadvantage.
Jul 2023GeneralWorkshop condition requirement for sealing and weatherstrip work all variants
MG's description of the power seat explains that each motor is fed 12V straight from the switch pack, and that when the seat reaches the limit of its travel in any direction a thermal protection cut-out drops the power automatically to save the motor. Practically, that means holding the switch once the seat has stopped achieves nothing except heating the motor, and a seat that goes dead for a while after a lot of fiddling - moving a child seat, swapping drivers, loading long items - can be the protection working rather than a failure. Worth leaving it alone for a few minutes before booking a repair, particularly since MG's remedy for a genuinely failed seat motor is to replace the assembly it lives in rather than the motor alone.
Jul 2023GeneralCars fitted with the powered driver's seat; manual seats are unaffected.
If you work a window up and down several times in quick succession, the MG4 will cut that window's switch dead. This is deliberate. Motors without one-touch up use a temperature-sensitive patch that opens and disconnects the motor power when it gets hot; motors with one-touch up and anti-pinch have a control module and the body computer decides the motor is too hot and stops it. Either way the switch goes inert and stays inert until the motor cools, then the window works normally again. Owners meet this when valeting, when demonstrating the car, or when repeatedly trying to clear something from a window channel, and it reads exactly like an electrical fault. Wait a few minutes before booking a diagnosis.
Jul 2023GeneralAll MG4 variants, both anti-pinch and non-anti-pinch window motors
On the MG4 the wiper arms park low, tucked under the lip of the bonnet, so you cannot simply lift them off the glass to swap blades. MG's own blade-change procedure starts at the centre screen: with the bonnet closed, go to the Safety section and choose Power Off, then within about twenty seconds push the wiper stalk down to the single-wipe position and let go. The wipers walk up the windscreen and stop there, clear of the bonnet, so the arms can be lifted. When you have finished, another single-wipe press of the stalk (or simply powering the car up) sends them back to their normal park position. Forcing the arms up without doing this is how people bend an arm or crack the trim at the base of the screen.
Jul 2023GeneralApplies to the front wipers on first-generation MG4; procedure is from MG's own workshop manual. all variants
On cars fitted with power folding, MG states plainly that the mirrors are to be folded and unfolded using the switch and must not be pushed in by hand, because doing so can damage the equipment. That matters in two everyday situations: pushing a mirror in to squeeze past in a narrow space, and rolling into an automatic car wash where an attendant may fold them for you. The folding motor lives inside the mirror body, which MG treats as a non-serviceable assembly, so damaging it is not a cheap outcome. The car folds them itself on locking and unlocking anyway if the feature is enabled, and the switch on the driver's door does it manually.
Jul 2023GeneralPower-folding mirrors only; fitment varies by trim and market. all variants
MG splits the door mirror into repairable and non-repairable parts, and the split is useful to know before you accept a quote. The mirror cover, the mirror glass, the side indicator lamp built into the housing and the camera in the underside are all listed as separately replaceable. The mirror body - the housing with the adjustment and folding motors inside - is not: MG says it is replaced as a complete assembly. So a kerbed or scuffed cap, a cracked glass or a dead side repeater should be a small part and not a whole mirror, while a motor that has stopped adjusting or folding means the lot. The interior mirror, manual-dimming or auto-dimming, is assembly-only either way.
Jul 2023GeneralExterior mirror assemblies, first-generation MG4; camera fitment depends on whether the car has surround view. all variants
MG describes the MG4's intermittent wipe as variable rather than automatic: there is a delay control on the stalk but no rain sensor in this configuration. What varies the interval is road speed. The stability control system feeds wheel speed to the body computer, which shortens the gap between wipes as you go faster and lengthens it as you slow down, on top of whatever delay you have dialled in. So wipers that appear to speed up on their own on a motorway are behaving exactly as designed. There is a second designed behaviour worth knowing: after you pull the stalk for a wash, the blades sweep three times once you let go and then, a few seconds later, wipe once more to clear the drips off the glass. That final lone wipe is not a fault.
Jul 2023GeneralFront wiper control described for the configuration without a rain sensor. all variants
Both the windscreen and the rear window are bonded in, not held by a rubber seal, and MG's procedure is to press the new glass in, tape it in position and leave the adhesive for a full 24 hours before the tapes come off. The fitter is then meant to pour water over the glass and check for leaks - and if it leaks after drying and sealing, the glass comes out and the whole job is done again. Two things follow for an owner. A same-morning collection is not what the manufacturer's process describes, whatever a mobile fitter's own safe-drive-away figure says. And a windscreen leak showing up weeks later is a bonding failure the fitter should own, because MG builds a water test into the job. The rear quarter windows are bonded too, to their trim covers rather than directly to the body.
Jul 2023GeneralBonded glass replacement, first-generation MG4. all variants
Raise any rattle or latch fault in writing and early, while you are clearly inside warranty - one Australian owner reported interior door trim buzzing from as little as 600km and a bonnet latch that failed after two weeks.
2026AUAustralian-market MG4 all variants
A buzz or vibration that seems to come from the glovebox is often the heating vents that exit the bottom of the glovebox area into the footwell, so locate it yourself before booking a dealer visit.
Wiki, 2022-2026UK/EUMG4 2022–2025, all variants
One Australian MG4 owner-blogger found that sliding out just the centre rear headrest noticeably improves the shallow rear view on Phase 2 / 2023 Australian cars, and still leaves two usable rear seats.
Oct 2023AUPhase 2 / 2023 Australian MG4 with three rear headrests all variants
An Australian review of the Long Range Essence 77 flags noticeable wind noise around the A-pillar at about 110 km/h, and rear vision restricted by the small rear window and high headrests.
date not establishedAUAustralian MG4; Essence trim tested all variants
The MG4's automatic headlights have no user-adjustable sensitivity, and owners report them switching on under overpasses and in tree shadow.
Wiki, 2022-2026AU+UKSCUK001MG4 2022–2025; SCUK001 is a UK update reference all variants
Owners find water sitting under the boot floor tray around the tyre pump and towing eye, and inside the tailgate itself, where it runs down the sides when you open the boot. Named entry points are a defective boot seal (replaced under warranty), badly seated or over/under-tightened rear light cluster gaskets, and holes drilled for the number plate. Dry it out, then get the dealer to pressure/hose test it while it is in warranty.
Oct 2023GeneralReported on SE and Trophy cars from a month old; check the spare-wheel well after heavy rain all variants
Owners describe a grinding or squealing rub at slow speed on three-quarter to full steering lock, sometimes cured temporarily by reversing a short distance. Forum guesses ran to grit between disc and caliper or tyre scrub, but the one owner who got a dealer diagnosis found the stone guard under the very front of the car had worked loose; tightening its bolts cured it. Check that panel before authorising any brake work.
date not establishedGeneralSlow-speed manoeuvring at or near full lock; noise fades as the wheel unwinds. all variants
Several owners have found water sitting inside the boot lid itself rather than in the boot floor, noticing it when it runs out as the lid is opened. Suspected entry points include the boot seal, rear light gaskets that are not properly seated, the rear window seal, and number plate holes that were drilled untidily. The genuinely useful detail from the thread is that there are removable rubber bungs near the boot hinges that let you drain the cavity. At least one owner had a new boot seal fitted under warranty.
Aug - Oct 2023GeneralReported across MG4 trims; variant not identified as a factor all variants
Multiple Australian owners describe a clunk from the rear left, noticed when pulling out of a garage and going over speed bumps. Suggested explanations included the parking brake releasing and suspension settling, and some owners reported it easing over time. It is common enough to be worth mentioning at a service, and specific enough to be worth describing precisely, since a rear-left-only noise narrows the search considerably compared with a general rattle.
2025AUReported by Australian owners; variant not identified as a factor all variants
A frequently reported fault that is not one. Owners notice the bottom five centimetres or so of the rear screen staying misted while the rest clears, and conclude the demister is failing. The lines across that bottom section are the radio aerial, not heating elements, so they were never going to clear it. Nothing is broken and there is nothing for a dealer to fix.
2025AUReported by Australian owners; applies across the range all variants
The MG4 has no rear wiper. On a hatchback with a steeply raked tailgate this is more noticeable than it sounds, because the rear screen collects spray and road film exactly where the wiper would have cleared it. The rear demister helps with condensation but does nothing about water on the outside. Owners who rely on the mirror rather than the reversing camera find this the single biggest day-to-day omission, and there is no retrofit.
Jul 2022GeneralApplies across the MG4 range in all markets
Two complaints about the front seats from Australian owners covering long distances: not enough lumbar support, with one reporting low back pain after a few hours at the wheel, and a seat that creaks badly. Neither is universal and seat comfort is highly personal, but if you regularly do multi-hour drives it is worth a long test drive rather than a lap of the block. A creaking seat is a warranty matter and worth raising early.
Dec 2023AUReported on Australian cars, mostly Essence 64; seat specification varies by trim all variants
On lower-trim cars fitted with the small plastic ducktail spoiler on the tailgate (UK SE), the spoiler can work loose over time. When it wobbles it breaks the seal between the bottom of the rear screen and the plastic, letting water in. Owners put this down to the factory not using thread-lock on the spoiler screws; dealers have re-secured and resealed it quickly, one in about 40 minutes. It is worth checking even on a currently dry car, and it has been spotted loose on showroom stock too. Cars with a roof spoiler instead of the ducktail seemed less affected.
Nov 2023GeneralLower-trim ducktail spoiler loosening and breaking the rear-screen seal
Where owners gave up on the dealer, two DIY fixes have worked. One simply pulled the tailgate rubber seal out slightly (proud of its channel) and the leak stopped. A more thorough fix: open the bumper just enough (a few screws under the wheel arch and two bolts by the boot) to reach the clipped-in vent flap, remove it, clean and dry the soft foam gasket, which can be dirty and waterlogged like a sponge, and add thin shims behind the clips so the gasket seats under more pressure. Another owner instead fitted downward-pointing tower grommets with a small drain hole so any water that collects can escape.
Mar 2026GeneralOwner DIY remedies for the boot water leak all variants
Owners noticed that the cars leaking into the boot were often the same ones prone to misting up the rear window and developing a musty, pond-like smell inside, sometimes long before the standing water was found. If an MG4 fogs up more than seems normal or smells damp, it is worth lifting the boot floor and tray to check for water before it soaks the carpet and works forward to the rear seats.
2024GeneralCabin fogging/musty smell as a symptom of undetected boot water ingress all variants
A recurring frustration is that the noise depends on wind direction and is not always present. One owner hears it some days and not others; another found the car whistles driving one way and not on the return leg, and two separate mechanics independently confirmed that direction-of-travel changes whether it appears. A slight crosswind seems to set it off. This is exactly why dealer visits stall: the car often will not make the noise on a short test drive, so the dealer reports they cannot hear anything.
May 2026GeneralWind noise is intermittent and crosswind-dependent, defeating dealer diagnosis all variants
Owners who got anywhere did their own detective work. One taped over the window edges with cloth tape, which silenced the noise, then planned to peel back one edge at a time to isolate the culprit. Taping the whole driver's-side windows and then the door outline is a quick way to rule the side out. The most decisive test came from taping a microphone behind the front number plate and driving: the whistle recorded there was very loud, pinning it to a front element (the active grille). Pressure-washing the grille to dislodge winter grime did not help in the cases tried.
May 2026GeneralDIY localisation: tape sections one at a time, or mic behind number plate all variants
A separate common gripe on these pages is a rattle from the glovebox and footwell area. Owners fixed it cheaply by lining the trim with self-adhesive felt: about a quarter of one sheet is enough to silence the glovebox, and the same felt is useful to line the sunglasses box and the sliding storage pocket where keys can rattle. Owners rate it an easy do-it-yourself job that avoids leaving the car with the dealer, though some argue a rattle on an expensive new car should be a warranty fix.
Nov 2022GeneralFirst-gen MG4, all trims; DIY felt fix for glovebox/console rattle
In the exterior lighting procedures, the test for a low beam, high beam, front position lamp or daytime running lamp that will not illuminate is to remove the whole headlamp assembly and fit a known-good one. There is no bulb-level step. By contrast MG does name individual bulbs where they exist - the number plate lamp bulb and the boot light bulb both appear as possible faulty parts in their own symptom tables. The contrast tells you something practical: on the MG4 the headlamp's light sources are not treated as separately serviceable items, so a failed dipped beam or a dead DRL means a headlamp assembly, which is a substantially bigger bill than a bulb.
May 2022GeneralMG4 EV Guided Fault Finding, Lighting System, exterior lamp procedures (p118-127) - UK/EU document all variants
Check the cabin air filter early if the car lives outdoors or rurally, because one NSW Essence 64 owner found a dead rat and nesting material in theirs.
Mar-Apr 2026AUAustralian MG4, one owner report all variants
If your MG4 chimes with no matching warning on the dash, check the outer rear seats — anything over roughly 10 kg there reads as an unbelted passenger, so buckling the unused rear belts usually stops it.
Apr 2024UK/EUall MG4 variants
A single owner in a Feb 2023 thread reports that a stone chip on his roof turned rusty within days, that there is 'no zinc there', and that the paint seems fragile in general; he adds he cannot tell whether the bonnet and doors are galvanised but the roof does not appear to be. Treat that as one owner's observation rather than an established specification or a forum consensus, and touch in chips promptly rather than waiting for a service. The thread does not support claims about jet washes enlarging chips, spot-welding burning off galvanising, paint hardening times, or PPF.
Feb 2023GeneralAll MG4 body colours; roof, bonnet and lower sills are the areas owners name
A UK owner raised the transparent perspex piece where it meets the black trim on the rear light bar, reporting condensation inside it and saying the perspex is prone to cracking; he was still waiting on MG's warranty decision and had been told it would cost about GBP530 to replace if MG declined. An Australian owner replied that he had a similar issue, so it is not confined to one market. Note that nobody in the thread reports an actual crack on their own car — cracking is raised as a risk, condensation is what is actually observed — so photograph the condensation early and raise it while the car is still covered. Another owner suggests a hairdryer clears the misting.
Mar 2025AU+UK2022-2025 MG4 rear light bar; the clear cover, not the light unit itself all variants
An owner chasing a knock from the front that was worse on broken surfaces traced it to the coolant expansion filler caps, which he said rattle in their necks even when fully tightened; a strip of electrical tape wrapped round the cap cured it. Another poster warned not to seal the caps because that is how the coolant system vents, the original poster confirmed they look to have a built-in vent, and a third suggested taping the sides only. This is one owner's diagnosis rather than a confirmed pattern, but it is a cheap thing to eliminate before paying for a suspension diagnosis.
Aug 2023GeneralKnock from under the bonnet on rough or broken surfaces, present from new all variants
Owners notice the lowest two or three horizontal lines on the rear glass stay fogged while the rest clears, and assume the demister element is faulty. Those lines are the radio antenna printed into the glass, not heating elements, so they will never demist. It is normal — don't book a warranty repair for it.
date not establishedAUAll MG4s; most obvious on cold damp mornings
An Australian owner had a service centre remove the entire door panel and loosen and retighten fixings without curing a door rattle, then fixed it in about a minute by sliding folded paper between the plastic trim and the metal door. The durable version is foam tape around the whole contact point to isolate plastic from metal. Try this before you spend a service visit on it.
date not establishedAUBuzzing or vibration from a door card, often intermittent and speed-dependent all variants
An Australian owner traced a door rattle to the plastic door trim vibrating against the door metal, and fixed it by inserting thin cardboard or foam tape into the gap at the bottom of the door panel. He reported it still silent six months later including on rough roads. The service centre's approach had been to remove the whole panel, which did not solve it. This is a five minute job with materials you probably already have, and worth trying before booking the car in.
2025AUReported on an Australian car; door construction assumed common across the range all variants
A small design annoyance owners have noticed: the front side washer jets can be obstructed by the parked position of the wiper arm, so washer fluid does not reach the glass where it is needed. No fix was established in the discussion. If your washers seem to be spraying but the screen is not clearing properly on one side, check where the spray is actually landing rather than assuming the jets are blocked or the pump is weak.
Dec 2023AUOne Australian owner report; variant not stated all variants
An Australian owner reported the plastic moulded trim on the boot hatch lifting and flexing when the hatch is opened, describing it as a loose fit rather than damage. It joins the other boot-area complaints on this car, alongside rattles from the number plate and the latch cover, and water collecting inside the lid. If yours moves, note it while the car is new; trim fit is a warranty matter and much easier to raise early.
Dec 2023AUOne Australian owner report; variant not stated all variants
An unusual fault worth recognising: UK owners have reported the powered wing mirrors closing while the car is in motion. It is not common, but it is disconcerting and it removes your rear view without warning. If it happens once it is worth reporting rather than dismissing, since a mirror that folds at speed is a visibility problem rather than a cosmetic one.
2023UK/EUReported on UK cars; variant not stated all variants
Where the noise comes from a door that is not sitting flush, a dealer adjustment of the door alignment (described by the owner as adjusting the hinges so the door fits the aperture correctly) fixed it under warranty on one early car. Other owners are sceptical that a tiny, out-of-airflow hinge gap could matter, so this fix seems to apply only when a panel is genuinely misaligned rather than to the front/grille whistle.
Apr 2025UK/EUDoor-fit/hinge adjustment fixed wind noise on one misaligned car all variants
For higher-spec cars fitted with the twin/dual rear spoiler (Trophy in the UK, equivalent to Essence locally), some owners suspect the gap between the two spoiler elements as a whistle source, and there are reports that tightening the spoiler mountings resolved it. It is less well proven than the active-grille finding, and at least one owner taped the spoiler seams without curing his noise, so it is one thing to check rather than a guaranteed cause.
May 2026GeneralDual-rear-spoiler gap as a possible whistle source; tightening cited as a fix
Don't leave the car parked for weeks with the traction battery near empty - the owner's manual states that intelligent charging of the 12V is suspended when the high-voltage battery is at a low state of charge, so the 12V can go flat.
Mar-May 2026UK/EUall MG4; thread is in the XPOWER forum but the mechanism is common to the range
If the car is going to sit parked, leave the high-voltage pack above about 50%, because the owner's manual states the intelligent 12V charging function is suspended when the HV battery is at a low state of charge.
Mar–May 2026Generalall MG4 variants (thread covers MG4 XPOWER and MG4/MG5); not market-specific
MG4 owners in the UK and other markets do report the 12V battery going flat while the car is parked, so if yours will sit for more than a week, use a trickle charger or take it for a periodic short drive.
Jul 2025UK/EUall MG4 variants; reported across UK and other markets
After any 12V disconnect, have the one-touch windows and the steering-angle sensor re-learned - with the wheels straight for the steering reset - before you drive, or the car can flag steering and driver-assist faults.
Wiki, 2022-2026GeneralMG4 2022–2025, all variants
The tailgate is electrically released, so a flat 12V can leave the boot virtually impossible to open - keep your jump pack in the cabin rather than locked in there.
Jul 2024UK/EUall MG4 variants
Budget on an early 12V replacement: the car leaves the factory with a small ~45Ah flooded lead-acid battery in the 063 case size, and MG EV owners report flat batteries and short lives.
Jul 2024GeneralMG4 and other MG EVs, all markets
Owners collecting cases together identified four recurring causes. A genuinely defective 12V battery that no longer holds charge is only one. The others are a charging system not topping the 12V up properly, which dealers address with a software update; the car being left unused for over a month; and parasitic drain from things owners added themselves, most often dashcams and plugged-in diagnostic dongles. Before replacing the battery, work out which of the four you have, because three of them are not fixed by a new battery.
Jul 2024GeneralReported across MG4 trims; variant not identified as a factor all variants
MG's programming and configuration manual states that after replacing either the 12 volt battery or the electronic battery sensor, a write battery ID operation must be performed with the dealer diagnostic system. The manual uses the word must. The same section also notes that after the car is powered down it needs to stand for at least four hours before the system can read accurate battery status information.
Jul 2023GeneralDocumented for the MG4 generally, so all variants are listed
This is the clause that matters most to anyone with a recurring problem - and on an MG4 that usually means a 12V battery that keeps going flat. The terms give the AA the right to refuse service where it is asked to deal with the same or similar fault it already attended within the preceding 28 days. More than that, if the AA believes the cover is being over-used for a fault it has attended before, it will report the matter to MG, and MG then decides whether any further assistance is provided until a permanent repair has been carried out. The booklet also puts the obligation on you: where a patrol carries out a temporary fix, it is your responsibility to get the car to an MG Service Partner and have it made good properly. The practical lesson is that a jump start is not a solution. If the car has stranded you once, get the underlying cause diagnosed and recorded in writing straight away, because the second and third call-outs are not guaranteed.
Apr 2019UK/EUUK MG Assistance clause; the mechanism is generic to breakdown cover but the wording quoted is UK-specific. all variants
The 12V battery has its own line in the exceptions table: 12 months for cars registered after January 2017, with a footnote limiting every 12V battery claim to a maximum £100 payout. Given how often an MG4's 12V battery is the thing that leaves you unable to open the boot or wake the car, that is worth knowing before you argue with a dealer - the cover is short and the money is capped, so a claim is only ever a contribution. It also means a flat 12V that traces to something else drawing current, rather than to the battery itself, is the better claim to pursue, because the module at fault is covered on the normal warranty terms rather than on this capped line.
Oct 2021UK/EUUK 12V battery warranty term and payout cap; differs from the Australian term. all variants
MG says this twice in its own words: when charging the 12V battery in the car, or jump starting, the negative lead must go to a good body grounding point rather than the battery's negative terminal. The reason is the electronic battery sensor clamped onto that negative post - it measures every amp going in and out so the car can work out the battery's state of charge and health. Clamp onto the post itself and the current bypasses the sensor entirely, so the car never sees the charge you just put in and its battery calculation goes wrong. The consequences are the annoying kind: nuisance warnings, an odd state-of-charge estimate, and the car managing its power-saving strategy on bad data for a while afterwards.
2023GeneralFirst-generation MG4 12V system; procedural fact about the car, not market-specific. all variants
The MG4 carries an electronic battery sensor bolted to the negative terminal, reporting voltage, current and temperature over a LIN bus so the car can shed loads before the battery gets too flat. MG states that once that sensor has been refitted it takes at least four hours before it has accurate status information, and adds a useful tip: for electrical work, disconnect the negative cable at the sensor rather than pulling the whole clamp off the battery post, because then the sensor keeps its picture and settles again much faster. MG also warns not to remove the sensor from the negative cable at all except when replacing the battery. The practical upshot is that immediately after a battery change or a disconnection you should not read much into what the car says about its 12V system.
2023GeneralFirst-generation MG4 electronic battery sensor; procedural fact about the car. all variants
MG's own guidance covers what happens with a badly discharged 12V battery: below about 11 volts the acid has weakened to nearly water, internal resistance is high, and at the start of charging it can look as though the battery is refusing to accept anything. As charging continues the electrolyte strengthens and the current comes back up. So do not condemn a battery in the first few minutes. MG gives limits worth knowing too: do not charge below 0 degrees, stop if the battery rises above 40 degrees, and never charge a battery whose case is bulged, cracked or leaking or whose terminal post is broken - replace it instead. Charging is effectively finished when the current falls below about 2 amps. MG also notes that a battery can be checked with a common aftermarket tester such as a Midtronics unit, but that readings from a tester of the wrong type should not be used to judge it.
2023GeneralFirst-generation MG4 12V lead-acid battery care; general vehicle fact, UK/EU document. all variants
The combined charging unit does two separate jobs. Plugged into AC, it filters, rectifies and converts mains power into high-voltage DC for the traction battery. While driving, it steps high-voltage DC down to 12 volts to run the car's electrics and charge the 12V battery - it is the MG4's equivalent of an alternator, and there is no separate one. That matters when you are chasing a repeatedly flat 12V battery: as well as the usual suspects, this unit is part of the circuit that is supposed to be charging it, so it belongs on the list of things a dealer checks rather than being ignored while a third new battery is fitted. It also explains why the 12V is only being replenished while the car is awake, driving or charging, not simply because it is parked in the sun.
2023GeneralFirst-generation MG4 high-voltage charging architecture; general vehicle fact. all variants
MG has a named symptom for the 12V supply failing to be topped up, and the running order it gives technicians is telling: look at the charging unit's external condition, then its coolant pipes and clamps, then the charging unit's fuse, then the wiring between the charging unit, the fuse box and the battery, and only then the charging unit itself. The 12V battery does not appear anywhere in that sequence, because in this car the same unit that charges the traction battery from the wall is what keeps the 12V topped up. If your 12V keeps going flat and a new battery has not fixed it, this is the chain MG expects a workshop to follow - and it means a single blown fuse or a coolant leak around the charger can leave you with a car that flattens its 12V no matter how much you drive it.
May 2022GeneralMG's 'Low-voltage Battery Feed' symptom diagnosis for the first-generation MG4; UK/EU document but describes car behaviour, not dealer process. all variants
MG carries a symptom called low-voltage battery feed under the Combined Charging Unit chapter, and its expected causes are, in order: visible damage or ageing of the components, the unit's external coolant pipework, the charging unit's fuse, the harness running from the charging unit through the fuse box to the battery, and finally the charging unit itself. In other words, when the 12V battery is not being kept topped up, MG does not start at the battery - it starts at the device that is supposed to be feeding it. If you have replaced a 12V battery and it has gone flat again, this is the chain to ask about by name, along with the fuse and the harness between the unit and the battery, rather than accepting a second battery.
2022GeneralUK/EU service volume; describes the vehicle's charging architecture, general to the model. all variants
Buried in the electrical inspection guidance is a number that matters to anyone chasing a flat 12V battery: MG states the car usually takes three to ten minutes to enter its sleep state fully. It also lists what has to be true for the car to be genuinely asleep - start switch off, key away from the car, accessory power off after the driver's door has been opened and closed, all doors shut, headlamps off with auto headlamps disabled, any delay lamps extinguished, the climate system off, and no scan tool talking to the car - then a further wait before any reading is meaningful. If you or an auto electrician are measuring parasitic drain on an MG4, testing before the car has been left undisturbed for that long will produce a scary number that means nothing. It also explains why the car is still doing things - fans, lamps, modules - for several minutes after you have walked off.
2022GeneralMG4 EV first-generation; vehicle sleep behaviour, not market specific all variants
MG treats "vehicle cannot be powered on" and "vehicle emergency power-off" - the car cutting its high-voltage system while you are using it - as the same fault family, with an identical six-step list. It starts with physical things: the manual service disconnect being damaged or poorly connected, then a blown fuse in the power electronic box, then the high-voltage interlock circuit, then a high-voltage insulation test, then the high-voltage and low-voltage harnesses and their connectors, and only at step six the 12V battery being flat, damaged or aged. The takeaway for an owner is that a dead or self-shutting MG4 is, in MG's expectation, a connection or a fuse rather than a failed battery or motor - but it is high-voltage work and not something to poke at yourself.
2022GeneralMG4 failing to power up, or shutting its drive system down in use all variants
The airbag module watches itself continuously and lights the dashboard warning lamp for anything it does not like, including a supply voltage that simply falls outside its accepted range. MG states plainly what the lamp means: while it is on, the restraint system may not operate in a crash. Two things follow for MG4 owners. First, given how often these cars suffer weak or flat 12V batteries, an airbag light is worth checking against battery health before assuming an expensive airbag fault. Second, an airbag light is never something to leave until the next service, because seat belt pretensioners and every airbag are on the same watch list. The car stores a code either way, and a fault that clears itself still leaves the code behind for a technician to read.
Jul 2023GeneralAll MG4 variants; airbag control module self-monitoring
Park on an MG4 is not a lever position. A small electric motor drives a pawl that locks a toothed gear on the drive unit's input shaft, so when the car is in P the rear wheels are held through the gearbox. MG's manual carries a dedicated 'P gear unlocking' procedure for the cases where the car will not come out of P at all: a flat 12V battery, a failed electric parking module, a high-voltage system that is down, or a shift controller that has lost communication. It is not a roadside fix. The high-voltage service disconnect has to be pulled, the underbody deflector taken off, a sealed vent plug prised out and thrown away, and a special tool wound clockwise inside the housing until the pawl clears. MG says the car needs to be supported on a jack while this is done, and that if you meet real resistance you must stop immediately or you will wreck the parking mechanism internally. The sting is the caution at the end: once 12V power is restored, the car simply shifts itself back into P. Where the problem is only a communications fault, the alternative is a dealer scan tool running the parking module's travel self-learn, which finishes with the pawl out of P. The practical upshot for an owner or a recovery driver is that a dead MG4 does not become freewheeling because someone found a lever, and getting the wheels turning again is a workshop operation rather than something done in a car park.
Jul 2023GeneralAll first-generation MG4 drive units documented in the July 2023 service manual; workshop procedure with owner and recovery consequences.
The interior lighting is run by the body computer rather than by simple door switches, and it has a battery-saving cutout built in. If a door is left open, the lamps fade out after 15 minutes once the energy-saving function is active. The same 15-minute limit applies to the courtesy delay after you switch the car off. There are shorter timers on top of that: unlock the car and the reading lamp comes up but fades again if no door is opened within 30 seconds, and locking the car or arming the alarm kills the delay immediately. This is genuinely reassuring in the context of the MG4's reputation for flat 12V batteries - a door left ajar overnight will not sit there burning the lights until morning. It also means the boot light is no good as a work light if you are doing anything that takes a while.
Jul 2023GeneralBody control module interior lighting logic, first-generation MG4. all variants
Plenty of MG4 owners keep a charger or maintainer on the 12V battery, and MG's manual sets out its own limits for doing it. Do not charge the battery below zero degrees. Stop charging if the battery itself rises above forty degrees, and wait until it has come back to room temperature. If the case is cracked, leaking or bulged, or a terminal post is broken, the battery is to be replaced rather than charged - find out why first. Clean the oxide off the posts and grease them before connecting. Connect the positive lead first and disconnect the negative first. And when the battery is still in the car, put the charger's negative clamp on a good body earth point rather than the battery's negative post, because the car's current sensor lives on that post and bypassing it leaves the car with a wrong idea of its own battery.
Jul 2023GeneralAll first-generation MG4 with the standard maintenance-free 12V battery.
U1562 and U1563 mean the module's own power supply voltage is too high or too low, and they are the only two codes MG defines in all 23 modules of the car. If a diagnostic read comes back with those codes scattered across the whole vehicle, that is not 23 broken modules. It is one supply problem - most often a tired or flat 12V battery, a charging fault, or a bad earth - being noticed independently by everything on the car. It is worth knowing before anyone starts quoting for control units, because the modules are among the most expensive parts on the car and the 12V battery is among the cheapest.
Aug 2023GeneralAll first-generation MG4.
If your 12V keeps going flat, look at your wallbox: one UK owner found both his MG4 and his ZS EV down to about 3V on the 12V after overnight sessions on a GivEnergy charger.
May 2024UK/EU2023 MG4 on smart wallboxes with always-on handshake
If you are leaving the car for weeks, UK owners relay an MG technician's advice to store it above 50% HV charge and to switch it on for about 30 minutes once a week so the DC-DC converter tops the 12V back up.
May 2026UK/EUall 2023 MG4 variants
Owners on the UK forum rate flat 12V batteries among the most common MG4 gripes, and the culprit is a budget size-063 lead-acid of only about 45Ah, small for the job.
Mar–Apr 2023UK/EUall MG4 variants
After using wired Apple CarPlay, UK owners report a repeating 'USB disk identification failure' banner, sometimes followed by the radio dying and a 12V drain - one car went flat after about 2.5 days parked.
Sep 2023 - May 2024AU+UKall 2023 MG4 using wired CarPlay
A flat 12V battery leaves the car unresponsive to the key fob, and one owner discovered the practical sting in that: the boot is effectively impossible to open when the 12V is dead, and the jump pack was inside it. Keep any jump starter, and anything else you would need in that situation, in the cabin rather than the boot. This is worth sorting out before you need it, because the moment you need it is the moment you cannot get to it.
Jul 2024GeneralReported on MG4 generally; variant not distinguished
An Australian owner logging the 12V battery over eighteen months recorded a range of 12.4 V at the low end to 14.3 V at the high end, with another confirming 14.4 V while actively charging. The rule of thumb owners use is around 14 V when the car is running and charging the 12V, and 12.4 to 12.6 V at rest. A resting reading of 12.2 V is already low rather than borderline. Given how many MG4 problems trace to the 12V, a cheap voltmeter is a worthwhile thing to own.
Apr 2025AUMeasured on Australian cars; applies across the range all variants
An owner wiring a dashcam into the cabin fuse box (Dec 2022) found fuses he expected to be ignition-switched did not power off: after locking the car and walking away, LEDs on that circuit were still lit fifteen minutes later, and another poster explained that EVs commonly bring circuits live with the ignition off. He planned to move to the top-left fuse feeding the USB ports and wireless charger instead, expecting that one to drop at lock - but posted no test result, and another member pointed out USB outlets run at 5 V while the fuse box is 12 V. Measure with a meter before you commit, and use a hardwire kit with a low-voltage cutoff rather than trusting the fuse label.
date not establishedGeneralAny MG4 having a dashcam or other accessory hardwired into the cabin fuse box. all variants
However long the vehicle warranty runs, the 12V battery is covered separately and much more briefly: owners report 24 months with unlimited kilometres, and only for manufacturing defects. A 12V that has been flattened by a parasitic drain, or that has simply aged, is not a manufacturing defect. Given how many MG4 problems trace back to the 12V, it is worth knowing that this is the one component where you are on your own soonest.
Apr 2025AUAustralian warranty terms as reported by owners; applies across the range all variants
An Australian owner whose front passenger window stopped working resolved it by disconnecting and reconnecting the 12V battery, and reported that the car's settings survived the reset. That is worth knowing before authorising any diagnosis of a window motor or switch: an electric window that has simply stopped responding may be a module that has latched into a bad state rather than a mechanical failure. Note that on cars with automatic windows a 12V disconnect can require the window end positions to be relearned afterwards.
May 2025AUReported on an Australian car; variant not stated all variants
An Australian owner with multiple flat 12V batteries over two months found the cause was not the battery at all: a faulty gateway module was drawing current continuously. The module was replaced under warranty and the problem stopped. This is worth knowing because the instinctive response to a repeatedly flat 12V is to replace the battery, which in this case would have solved nothing and cost money. If yours keeps going flat with nothing obviously plugged in, ask the dealer to measure the parasitic draw rather than accepting a new battery as the answer.
Dec 2023AUOne Australian car in 2023; variant not stated all variants
An Australian owner's two-year service on a car with only 9,600 km on it surfaced several faults together: an intermittent boot lock failure, an airbag warning light, and charging warning lights. Low kilometres do not mean nothing has gone wrong, and on this car a cluster of electrical warnings appearing together is more often one underlying cause than several independent ones. Worth having a proper diagnostic rather than treating each warning separately.
2026AUOne Australian car at its two-year service; variant not stated all variants
One worry with any aftermarket electronics is a parasitic 12V drain. An owner who fitted a DSP amp, powered directly from the 12V battery through an inline fuse rather than tapped from the fusebox, reported no change in the car's energy use and came back after a month away to find the battery still at the 80% he had left it. A properly wired install did not appear to add standby load.
Aug 2024GeneralBattery-fed, inline-fused DSP install showed no standby drain after a month parked
Nothing needs switching on: an Australian long-term test of the Excite 51 (July 2024) describes the car powering up when you open the door and sit in the driver's seat, then shutting down when you get out and lock it.
Jul 2024AUall 2023 MG4 variants
On an Australian car, check the specific features you actually care about on the car in front of you instead of inferring a build phase, because production overlapped and a 2023 purchase date proves nothing.
Jul–Aug 2023AU+UK2022–2024 MG4; UK trim naming, but the physical tells carry across markets all variants
The emergency tailgate release is a knob behind a removable plug on the inner face of the tailgate lock, reached with the rear seats folded down - worth finding in the driveway before you ever need it.
Wiki, 2022-2026UK/EUMG4 2022–2025, all variants
Confirm the Type 2 cable is actually in the boot before you drive away, since one UK buyer in a February 2025 new-owner thread was handed a car with no charging cable at all.
Feb 2025UK/EUall MG4 variants
Adding or replacing an MG4 key is an immobiliser security operation, not a simple cut and copy. The manufacturer's tools gate key programming behind a security access tier, and the process needs the physical key present in the car plus a live connection to MG's database to authorise it. That means a general locksmith usually cannot produce an MG4 key; the work has to go through MG or an auto-locksmith who holds the security-tier access. Budget for that, and keep your existing keys safe, because replacing a lost last key is more involved than on an older car.
2025GeneralKey/immobiliser programming is security-tier and needs the physical key plus a live manufacturer database link all variants
The exclusion is blunt: attendance or payment for lost or stolen keys, or when keys have been locked in the vehicle, is not covered. Keys are also named alongside petrol and consumables in the list of things the cover will not buy. If a locksmith is needed the AA will try to arrange one, but will not pay, and the contract for that work is between you and the locksmith. There is a sting in the tail as well - once a locksmith or other specialist would, in the AA's view, get the car mobile again, no further service is available for that breakdown, so you cannot fall back on a tow instead. On a car with keyless entry, a digital phone key and a boot that will not open when the 12V is flat, this is worth knowing before you need it: a spare key kept somewhere sensible is cheaper than an emergency locksmith.
Apr 2019UK/EUUK MG Assistance exclusion list; Australian roadside terms not described by this document. all variants
The PDI includes operating the passenger airbag disable switch with a suitable flat-bladed device and confirming the correct warning display appears. Plenty of owners never find this switch, but it is the mechanism that makes it legal and safe to put a rearward-facing child seat in the front passenger seat - with the airbag live, that seating position is dangerous for a child. It deliberately needs a coin or a screwdriver blade rather than a finger so it cannot be moved by accident. If you use it, do not rely on the switch position alone: check that the dedicated airbag-off tell-tale actually lights before you drive away, and turn it back on when the child seat comes out.
2022GeneralPassenger airbag deactivation switch and its PDI check; a general vehicle feature. all variants
MG fits a Crash Power Module on the driver's side of the car, wired in series between the 12V battery and the body control module. It is a supercapacitor: it holds enough energy to run the body control module's unlock function even if the battery or its cable is destroyed in a collision, so the doors can still be released and people can get out or be got out. This is the documented mechanism behind the assurance that an MG4's doors unlock after an impact despite there being no mechanical emergency release on the inside handles - it is in MG's own description of how the car is built, not an inference from a crash test result.
2023GeneralFirst-generation MG4 low-voltage supply architecture; hardware fact, not market-specific. all variants
On cars with smart high beam, the front view camera watches for oncoming headlights and the tail lamps of cars ahead and the body control module raises and drops the main beam. It only works with the light switch in AUTO and the dipped beam already on automatically, above 40 km/h, with the rear fog lamps off, and it drops back to dipped beam below 40 km/h or when it sees another vehicle. Two documented quirks read as faults but are not. MG states the function can be activated at most three times in one start cycle. And toggling the high/low beam switch twice with more than two seconds between the flicks disables smart high beam for the rest of the drive — flicking twice within two seconds does not. Restarting the car, or putting the switch back to AUTO, brings it back. MG also lists conditions where it cannot judge for itself and you should switch manually: fog, heavy rain or snow, wet reflective road surfaces, poorly lit areas with lots of buildings, reflective signs, a dirty windscreen, steep hills and winding roads.
2023GeneralSmart high beam logic from MG's UK/EU training material; equipment-dependent and possibly software-version dependent, so verify on an Australian car. all variants
MG documents what the indicator lamps do when the security system arms. On a valid lock request with the anti-theft system enabled and the car fully closed, the direction indicators flash three times. If the anti-theft function is disabled, they flash once. And if the car is not fully closed — bonnet, tailgate or any door still open — they do not flash at all. That makes the absence of a flash a deliberate signal that something is still open, which is worth knowing on a car where a tailgate that has not quite latched or a bonnet resting on its safety catch is easy to miss, and where leaving the car unlocked overnight is a real risk. Get into the habit of watching for the flash rather than listening for a beep.
2023GeneralSecurity lamp behaviour from MG's UK/EU training material; a vehicle characteristic that should carry across markets but is easily verified. all variants
Two lighting conveniences MG documents that most owners never find. Follow Me Home keeps the dipped beam and side lights on after you shut the car down so you can see your way to the door; the duration is settable from 0 to 90 seconds in 30 second steps, opening a door restarts the timer, and it can be triggered manually by pulling the light stalk toward the steering wheel after the car is powered off. MG notes it will not work if the 12V battery is over-discharged. Separately, once the car has been locked for a few minutes, a vehicle locating function arms itself: press LOCK on the remote key and the car signals its position, either lights only or lights plus horn depending on the setting. Pressing LOCK again turns it off, and pressing UNLOCK cancels it.
2023GeneralLighting convenience functions from MG's UK/EU training material; menu availability can vary by trim and software version. all variants
MG has a symptom chart headed manual tailgate release failure, meaning a boot on a car without the powered tailgate that will not open. The second thing it tells the technician to do is swap the tailgate release switch for a known-good one, and the third is to work through that switch's wiring and connectors. So even the basic tailgate is opened by pressing an electrical switch that asks the car to unlatch, rather than by any handle that pulls the latch directly. That is the underlying reason a car with a flat 12V battery leaves you locked out of your own boot, which is exactly why owners warn against storing a jump pack in there.
May 2022GeneralMG's diagnosis for a non-powered MG4 tailgate that will not open; UK/EU-published manual, partial page. all variants
Before any workshop equipment comes out, MG's guided diagnosis for keyless locking, keyless starting and keyless tailgate opening starts with the same three owner-level checks, in this order: is the key simply too far from the car (MG uses roughly 1.5 m as the working distance for the tailgate), is there a strong radio interference source sitting next to the key, and is the key's own button cell making good contact and holding voltage. Only after all three have been ruled out does the manual move on to the key itself, then the fuse, then the antennas and modules. In practice that means a car that has gone deaf to its key deserves a few minutes of your own testing first: move the key closer, get it away from a phone, laptop, wireless charger, dashcam or other transmitter, and change the battery. Interference is the cause owners least expect and MG ranks it second.
2022GeneralApplies to any MG4 with passive entry; UK/EU service document, but describes how the car works rather than a market process. all variants
MG's diagnosis lists distinct antennas for the passive entry system: an antenna and button in each door handle, one or more interior antennas in the cabin, and a rear bumper antenna that serves the keyless tailgate release. Each is checked separately and each can be replaced on its own. That matters when you describe a fault: if the doors respond to the key but the boot will not open on approach, or the car unlocks outside but does not recognise the key once you are sitting in it, you are almost certainly looking at one antenna rather than a failed key or a failed control module. Saying which functions still work, and where you were standing, is the single most useful thing you can tell the service desk.
2022GeneralUK/EU service documentation; describes vehicle architecture, not a regional process. all variants
Keyless unlocking, keyless locking, keyless boot opening and the car refusing to start all open with the same three steps in MG's own procedures. One: is the key actually close enough - MG's working benchmark is that the fault should clear with the key within about 1.5 m of the back of the car. Two: is there a strong radio interference source near the key, the test being simply to move the key away from it and try again. Three: is the fob battery seated properly and still holding voltage. Only after those does the manual reach for the door handle aerials, the interior aerials, fuses and the keyless module. All three are things you can rule out in your own driveway before paying for diagnosis, and they explain why keyless problems so often cluster in one particular car park, near one building, or when the key is carried alongside another transmitter.
May 2022GeneralMG's own first-line causes for passive entry and passive start failures; UK/EU document, radio behaviour not market-specific. all variants
Two separate symptoms in MG's anti-theft section - the door ajar warning being unavailable when you lock the car, and the immobiliser triggering with the horn inoperative - are chased through exactly the same parts: the horn fuse, the horn relay, the horn's wiring, and the horn itself. No separate alarm siren appears anywhere in either list. So if the car has stopped giving you the audible nudge that a door or the boot is not properly shut when you walk away, and you have been assuming a software change or a setting you accidentally turned off, the more likely explanation is that the horn circuit has failed - and the same failure means the alarm would be silent if the car were broken into. A single press of the horn is enough to rule it in or out.
May 2022GeneralShared cause list for the lock-time door ajar warning and the anti-theft alarm; UK/EU document, architecture not market-specific. all variants
MG's procedures for the tailgate failing to open, whether you press the switch or use the remote key, both put a fuse check near the top: the power tailgate fuse, on cars fitted with a powered tailgate. After that come the release switch, the lock body, the left power tailgate support rod - the strut on that side is the powered unit - then the tailgate control module and finally the body control module. So a powered boot that has gone completely dead is worth a fuse check before anything else, and a boot that unlatches but will not lift itself points at that left strut rather than at the electronics. Every path MG lists is electrical, which is consistent with owners finding the boot unopenable when the 12V battery is flat.
May 2022GeneralMG's cause list for a tailgate that will not release, switch or key; UK/EU document, powered tailgate fitment varies by trim and market. all variants
Every one of MG's keyless routines - unlocking, locking, poor coverage, and the car not starting - opens with the same two questions before a single measurement is taken. Is the smart key too far from the car, with MG's test being whether the fault disappears with the key within about 1.5 metres of the tailgate, and is there a strong source of interference near the key. Only then does the routine move on to the key battery's contact and voltage, the key itself, the module fuse, the door handle antennas and the separate interior antennas. That is the manufacturer saying that intermittent keyless behaviour is, in its experience, usually the environment rather than a broken car. Before paying for a diagnosis, try the key away from a pocket that also holds a phone, earbuds, a power bank or a second key, and note whether it fails in the same place each time, because a particular car park, workplace or spot near a transmitter is a strong hint. The fact that each door handle has its own antenna also explains a car that unlocks reliably at one door and not another.
2023GeneralPassive entry and passive start diagnosis from MG's UK repair information; radio behaviour rather than a market-specific feature. all variants
In MG's routine for a remote key where nothing at all works, the third step is the key battery, and it is worded in a way that is directly useful to an owner. It asks that the cell be fitted the right way up with its positive face upwards and that it hold enough charge, and it defines enough by there being no anti-theft system warning lamp flashing on the information centre display. So the car does warn you that the key is going flat, through that lamp, rather than through an obvious low-battery message you might be looking for. It also means that if you have just changed the cell yourself and the key still does nothing, MG's own first suspicion is that the cell is in the wrong way up or is not making proper contact, not that the key has failed. Replacing the key, and then looking at mechanical parts, only comes after that.
2023GeneralRemote key diagnosis from MG's UK repair information; describes the car's own low-key-battery indication. all variants
MG splits a tailgate that will not release into two separate complaints - it will not open from the switch on the car, and it will not open from the remote key - and they run through different parts. On cars with the power tailgate the routine checks the power tailgate fuse early in both, then the release switch and its wiring, the left power tailgate support rod, the tailgate lock body, the power tailgate control module, and only last the body control module. Keyless opening at the boot is listed separately again and depends on an antenna in the rear bumper. So if your boot opens on the key but not the button, or the other way round, that is a diagnostic clue rather than a mystery, and it points at the switch or key side rather than the latch. A fuse and a tired support rod are both on MG's list ahead of the expensive modules, which is worth raising before a control module is quoted, and if keyless boot opening stopped after rear-end body work, the bumper antenna is the thing to check.
2023GeneralTailgate release diagnosis from MG's UK repair information; power tailgate content applies only to cars fitted with it. all variants
MG treats "door ajar warning function unavailable when locking" as a complaint in its own right, and the parts it lists give away how the feature works: the remote key, the horn fuse, the horn relay, the horn itself and its wiring, plus the door lock, before the body control module. The alert is a horn chirp, so if your car has stopped telling you that a door or the boot is not properly closed, the first things to rule out are the horn and its fuse - a car whose horn does not sound has also quietly lost this warning, and you would not necessarily connect the two. The other listed cause matters more: a door lock that is stuck or displaced can leave the car believing the door is shut when it is not, so the car locks and you walk away from a door sitting on its first catch.
2023GeneralAnti-theft system diagnosis from MG's UK repair information; check the configured warning behaviour on your own car. all variants
MG's diagnosis for a door that will not open from the inside has just two steps, and the first is purely mechanical. Check the interior handle cable on that side for damage, breakage or being too long, and check the handle itself for deformation or for not travelling far enough. Only when that is clear does MG say the door lock body may have failed and needs replacing. A cable that has effectively gone too long, or a handle that has lost part of its travel, means you pull and the latch never quite lets go - which is exactly what owners describe as the handle feeling slack or the door needing two goes. That is an adjustment or a cable rather than a lock, and it is much the cheaper repair to ask about by name. It is also worth fixing rather than living with, since this is the handle anyone in that seat would use to get out in a hurry.
2023GeneralDoor opening diagnosis from MG's UK repair information; a mechanical cause that does not vary by market. all variants
The gateway module and the body control module each hold a power mode setting, and MG instructs dealers to check before handing a new car over - and again after fitting a replacement module - that it is set to normal. The manual's stated reason is blunt: to prevent some of the functions those modules control from failing. The body control module is the one behind the lights, windows, door locks and charge flap, so a car that skipped this check could arrive with odd, apparently random faults in exactly those areas rather than one obvious problem. It is a plausible explanation for some of the 'new car with a strange electrical quirk' stories owners report in the first week, and it costs nothing to have checked.
Jul 2023UK/EUPre-delivery inspection item; also applies after a gateway or body control module is replaced all variants
The manual's power window operation section lists a 'Lazy Lock' feature: hold the lock or unlock button on the remote key for several seconds until the windows start to move, and all the windows close or open. This matters because owners have widely concluded the MG4 has no remote window closing at all and have gone looking for aftermarket modules to add it. MG's own first-party documentation says the function exists on the car, qualified with 'if equipped'. It is worth trying on your own car before spending money on a workaround - stand next to it, hold the lock button down and keep holding past the point where you would normally let go.
Jul 2023GeneralDocumented as a general MG4 power-window feature, marked 'if equipped' all variants
MG states that the one-touch down function is fitted to the doors of all models as standard, while the anti-pinch and one-touch up functions are only realised on some models. That is a more precise split than the usual owner shorthand about one-touch being a higher-trim feature: every MG4 gets one-touch down everywhere, and what you are actually paying for further up the range is one-touch up with obstruction detection. The safety consequence is the important part. Anti-pinch lives in a control module built into the motor and only exists where one-touch up exists, so on a window without it, holding the switch up will keep driving the glass into whatever is in the way. Treat the rear windows on a lower-trim car accordingly with children aboard.
Jul 2023GeneralAll MG4 variants; anti-pinch and one-touch up fitment varies by model
MG's own removal procedure for the driver's door describes a lock cylinder mounted in the outer handle, reached by removing a small plug at the rear edge of the door, with a mechanical link rod running from the cylinder to the door lock. The outer handles on both front and rear doors also work the latch through a physical link rather than purely electrically. This matters when the 12V battery is flat: the emergency blade key inside the fob has somewhere to go on the driver's door, and the mechanism it operates is mechanical, so it does not depend on the car having power. It is the counterpart to the well-known problem that a flat 12V leaves you unable to open the boot at all.
Jul 2023GeneralDriver's front door on keyless-entry cars; blade key lives inside the fob all variants
MG confirms the airbag module sends an unlock request the moment it senses an impact, so in a normal collision the doors free themselves for rescuers. The manual then adds a qualifier that matters: this does not apply where the car has been locked externally. In other words, the automatic post-crash unlock is a protection for people driving the car, not a guarantee that a locked, parked, deadlocked MG4 will open itself if something hits it. This is worth pairing with the known deadlocking behaviour, where a single press of the fob can superlock the car with someone still inside.
Jul 2023GeneralAll MG4 variants; behaviour of the body control module and airbag module
The car has three automatic locking behaviours that surprise people. Unlock it with the fob and then do nothing for 30 seconds and it quietly returns to the locked state it was in before; the countdown is only cancelled if a valid key is present in the cabin or the car is powered up. Once you are driving with the doors unlocked, the car locks all the doors by itself as soon as road speed passes a set threshold. And when you power the car down, it unlocks itself again. So the MG4 is almost never left in the state you last put it in, which explains the common complaint of coming back to a car you thought you had left open, and the click you hear pulling out of the driveway.
Jul 2023GeneralAll MG4 variants; body control module locking logic
The MG4 carries a backup for a dead key. A separate immobiliser coil is fitted inside the centre console armrest box, and when the fob's lithium cell is too weak to answer the car by radio, holding the key at that spot lets the car read it by short-range induction instead, exactly the way an old transponder key works. The car then runs its normal challenge and response between the body computer and the motor controller before it will let you drive off. Knowing where that coil is turns a dead fob from a recovery call into a ten-second inconvenience, and it pairs with the flashing anti-theft lamp that is the car's way of telling you the cell is going flat. The fob also carries a mechanical blade key for the door.
Jul 2023GeneralAll MG4 variants with passive entry and passive start
There are four low-frequency aerials involved in keyless operation: three inside the cabin and one in the rear bumper. The interior aerials do more than start the car, they also sweep the cabin to work out whether the key is still inside, which is how the MG4 stops you locking your key in it. The bumper aerial exists purely so the boot can be opened on its own without unlocking the rest of the car. MG also notes that if the key happens to sit in the overlap where both the interior and the bumper aerials can see it, it will open neither the tailgate nor the car. That is the likely explanation when the boot refuses to respond while you are standing right at the back bumper with the key in a rear pocket.
Jul 2023GeneralAll MG4 variants with passive entry; four LF aerials, three interior plus one in the rear bumper
On the MG4 the low-frequency aerial and the touch switch that wake the car up when you grab the door are not separate parts you can buy: they are built into the exterior door handle itself. MG's own repair route for a failed handle aerial is to replace the complete outer handle and lock cylinder assembly. That matters for a quote, because a fault that presents as 'keyless entry only works on the passenger side' is a body-coloured handle assembly plus paint matching, not a cheap sensor. It also means a damaged or forced handle is a bigger job on this car than on one where the electronics sit behind the panel.
Jul 2023GeneralMG4 variants with passive keyless entry; driver and front passenger exterior handles all variants
MG fits a pressure sensor into the foam of the front passenger seat so the belt chime does not nag you about an empty seat carrying a bag of shopping. The manual is explicit about the consequence: if someone is sitting there but the pressure sensor has not been triggered, no belt warning is given even though the belt is unfastened. In practice that means a small adult, an older child or a passenger perched forward on the seat edge can defeat the reminder entirely. Do not treat the absence of a chime as confirmation that everyone in the front is belted, and be aware that the same sensor sits in the chain for how the car treats that seat.
Jul 2023GeneralAll MG4 variants; front passenger seat belt warning only
The MG4 Electric holds a five-star ANCAP rating awarded in August 2023 under the 2020-2022 protocols, and it was the first MG to achieve five stars under those protocols. The detail buyers miss is the scope: ANCAP states the rating applies to the two-wheel-drive variants sold in Australia and New Zealand. The dual-motor all-wheel-drive XPOWER is not within that. If you are choosing the XPOWER partly on the strength of the range's safety rating, that rating does not extend to it.
Aug 2023AUAustralian and New Zealand two-wheel-drive variants are covered; the all-wheel-drive XPOWER is outside the stated scope
A charge flap that refuses to open despite the car being unlocked is a common and fixable annoyance. Owners resolve it by locking and unlocking the car repeatedly, either with the fob button or through the app, which re-triggers the release. If that fails there is an emergency manual release accessible from inside the boot. Worth locating that release once while you are at home, rather than discovering you need it at a public charger in the rain.
Dec 2024AUReported by Australian owners; applies across the range all variants
The safety equipment gap between Excite and the higher Australian trims is more than convenience features. Owners identify the Excite as missing blind spot monitoring, rear cross traffic alert and emergency lane keep assist. Rear cross traffic alert in particular is the one people miss most, since it is what warns you of a car approaching as you reverse out of a parking bay with limited visibility. Worth weighing against the price difference rather than treating the trims as the same car with different wheels.
Dec 2024AUAustralian Excite trims as specified in 2024
Even with the headlights set to manual, they come on when the car is unlocked, and the air conditioning starts itself as well. Australian owners have not identified a setting that disables either behaviour. It is a minor irritation rather than a fault, but it catches out owners who deliberately set things to manual and then find the car overriding them, and it is worth knowing before you spend an evening hunting through menus for a switch that does not appear to exist.
Dec 2024AUReported on Australian cars; applies across the range all variants
Australian buyers report being told one thing and signing another: one was quoted a week and a half to two weeks verbally while the contract stated six, and others waited three weeks or more past promised dates. Some contracts also carry a cost escalation clause allowing a price rise of around five percent between order and delivery. Read what you are signing, and if a delivery date matters to you, get it written into the contract rather than accepting it as a conversation.
Oct 2024AUAustralian dealer purchases in 2024; applies across the range all variants
A hard legal constraint rather than a preference. The MG4 XPOWER's power-to-weight ratio exceeds the New South Wales limit for provisional licence holders, so a P-plater cannot legally drive one there. If you are buying for a household that includes a provisional driver, or expecting a young driver to share the car, this rules the XPOWER out in that state regardless of anything else about it. The single-motor variants are not affected.
2024AUNew South Wales provisional licence restrictions; other states set their own rules
Buyers sometimes worry when a supposedly new car shows a couple of dozen kilometres at handover. That is expected: the total covers movement at the port, transport around the dealer site, and any pre-delivery road testing. Twenty to forty kilometres is the range Australian owners report as ordinary. A substantially higher figure, in the hundreds, is worth asking about, since that suggests the car has been used as a demonstrator.
Jan 2024AUAustralian deliveries; applies across the range all variants
The MG4's doors are electrically locked with no conventional mechanical emergency release, which understandably worries people. The reassurance comes from ANCAP's own testing, which confirmed the doors unlock automatically on impact, and that the car was assessed for submersion. That is the scenario the design is built for. It does not change the separate and real hazard that a deadlocked car can trap an occupant who has no key, which is a different situation from a crash.
Aug 2023AUAustralian cars; the ANCAP rating covers the two-wheel-drive variants all variants
If you are looking at an early MG4, Australian owners identify a cluster of problems concentrated in cars built before roughly November 2022: gearbox oil breather issues, plastic under the seats sagging with heat, and dashboards blistering. These are early-production faults that were addressed rather than characteristics of the model. Ask when the specific car was built rather than what year it was sold, since stock sat around, and check the dashboard and under-seat trim in person.
Jul 2023AUEarly-build cars from before approximately November 2022; the Long Range 77 and XPOWER arrived later
All MG4 variants have two user-programmable steering wheel buttons, but the base Excite is restricted in what can be assigned to them. This is why owners looking for a one-press shortcut to lane keep assist come away disappointed: the buttons themselves are configurable, but the function people most want is not in the list of options. Worth exploring what is available on your car, since a shortcut to something you use daily is still worth having.
Aug 2023AUAll Australian variants have the buttons; the Excite has fewer assignable functions
A checklist of absences worth knowing before you order rather than discovering afterwards. The MG4 has no front boot despite being rear-motor, no memory settings for seats or mirrors, no USB-C power outlets in the earlier cars, and no factory wireless Apple CarPlay or Android Auto on any trim. None of these is a fault and most owners live with them easily, but if any is important to how you use a car, it is better established in the showroom.
Aug 2023AUAustralian cars as specified in 2023; later model years may differ all variants
Prospective buyers cross-shopping against conventional hatchbacks notice the MG4's hip point sits higher, which is a consequence of the battery pack occupying the floor rather than a styling decision. Some drivers like the visibility it gives; taller drivers occasionally find headroom tighter than they expect as a result. Australian owners are consistent that this is something to judge by sitting in one rather than reading about, because reactions differ sharply between people of different heights.
Jul 2023AUAustralian cars; floor-mounted battery is common across the range all variants
The MG4's back seat has no folding centre armrest and no cupholders. Combined with the single USB socket and lack of rear air vents, the rear compartment is the most obviously cost-reduced part of the car. If the back seat is mainly for occasional passengers or children in seats it will not register; if you regularly carry two adults on longer journeys, it is worth sitting back there before you commit.
Jul 2022GeneralApplies across the MG4 range; rear equipment varies little by trim all variants
At 363 litres with the seats up, expanding to around 1,165 to 1,177 litres folded, the MG4's boot is modest for its exterior size, and owners compare it unfavourably against conventional hatchbacks of similar length. Underfloor storage is limited too, because the rear motor occupies space beneath. If you regularly carry a pram, a large dog crate or luggage for four, measure before you commit rather than assuming a hatchback of this length will swallow it.
Undated specification page, retrieved September 2026GeneralBoot capacity is essentially common across the range
Charge flaps arriving stiff or sticky is common enough that Australian owners put it on their delivery checklist alongside the paint and the dashboard. Open and close it several times, and if the dealer will let you, actually plug something in. It is a two minute check that is trivial to have addressed while you are standing in the showroom and tedious to arrange afterwards, and it is one of the few delivery faults that will stop you using the car at all.
Dec 2024AUAustralian deliveries; applies across the range all variants
An Australian owner produced a structured delivery checklist covering documentation, exterior, interior, systems and a drive test, and recommends going through it rather than relying on memory at handover. Collection day is busy, someone is waiting for you to sign, and the things that matter are easy to skip. The items owners most often wish they had checked are paint and hail damage, dashboard and trim finish, tyre pressures, the charge flap, and whether the software updates were actually done.
Sep 2023AUAustralian deliveries; applies across the range all variants
The MG4 has no start button. It shuts down when you lock it and comes alive when you press the brake pedal. Most owners adapt within a day, but two consequences catch people out. First, a spare key left in the car, including in the boot, will stop it locking and therefore stop it shutting down. Second, the app's lock function will not work unless the car has already powered off. If your car will not lock, look for a second key before looking for a fault.
Dec 2023AUReported on Australian cars; applies across the range all variants
Useful confirmation for households with a provisional driver: the single-motor MG4s are all permitted for P-plate use in New South Wales, and one owner specifically bought one so his newly licensed wife could drive it. Only the dual-motor XPOWER falls outside the power-to-weight limits. For comparison, most Teslas other than the base Model 3 are not permitted, so the MG4 is a genuinely useful option for a P-plate household wanting an electric car.
Oct 2023AUNew South Wales rules as of 2023; the single-motor variants qualify, the XPOWER does not all variants
MG's programming and configuration manual lists key addition and key deletion as body control module procedures performed with the dealer diagnostic system, alongside immobiliser matching. It also documents anti-theft matching for the steering column lock module, which includes writing a PIN code and learning keys, and states that the car can only be started normally once the anti-theft matching has completed successfully. Key related work is therefore tied to the security modules rather than being a standalone programming step.
Jul 2023GeneralDocumented for the MG4 generally, so all variants are listed
The manual splits door opening failures into two separate symptoms with noticeably different cause lists. For a door that will not open from the inside, front or rear, MG gives exactly two things to check: the interior handle and its cable, looked at for damage, breakage or excess slack, and the handle's own travel and shape, then the lock body. No motor, no wiring, no control module. For a door that will not open from the outside, the same first checks appear but the list continues into the door lock motor, its circuits and the body computer. Read together, that says the inside handle works you through a cable to the latch, while the outside release depends on electrics.
May 2022GeneralComparison of MG's two door-opening failure charts; UK/EU-published manual, mechanism not market-specific. all variants
MG carries two separate power-off complaints in this volume. For a car that cannot be shut down at all, the listed causes are a failed KL15 relay, the gateway module and the smart key. For a car that will only shut down if you hold the control instead of a quick press, MG lists just two causes: the passive entry and start module with its wiring, and the vehicle speed signal - meaning the car has not accepted that it has stopped, so it refuses a normal power-off. It is a genuinely counter-intuitive cause: a shutdown problem traced back to a chassis speed signal from the stability control system rather than to anything in the key or door circuits. If your car ever hesitates to power down, that is worth quoting to the dealer.
2022GeneralUK/EU MG4 service volume; some passive-start content appears platform-shared rather than MG4-specific. all variants
In the procedure for a remote key whose functions have all stopped, MG asks the technician to confirm two things about the fob battery: that it is properly fitted with the positive face upward, and that it still has sufficient capacity - with the stated test for capacity being that no anti-theft system warning lamp is flashing on the information display. That gives owners two useful things. If you see the anti-theft or immobiliser symbol flashing at you, treat it as a prompt to change the coin cell in the fob before assuming something worse. And if the key stopped working immediately after you changed the battery yourself, open it and check which way round the cell went in, because MG lists an incorrectly fitted battery as a real failure rather than an impossibility.
May 2022GeneralKey fob battery fitting and the dash indication MG associates with it; UK/EU document, inferred slightly from a parenthetical. all variants
MG diagnoses the two symptoms in completely different ways. A door that will not open from the inside has only two listed causes: the interior handle cable being damaged, broken or too long, or the handle short of travel or distorted - and if neither, the lock body itself. There is not a single electrical step in the procedure. A door that will not open from the outside runs a much longer chain: the exterior handle link and its liner, then the lock body, then the lock motor's supply, earth and signal wiring, then the body control module. Read together, that says the inside handle has a mechanical pull to the latch that does not depend on the car's power, while getting in from outside does depend on the electrics. That matters for anyone worried about being shut in, and it also means a door that opens fine from inside but not from outside is an electrical problem, not a seized latch.
May 2022GeneralWhat MG's own fault lists imply about the mechanical and electrical paths for opening a door; UK/EU document. all variants
The electronic unlock button on an exterior door handle can go unresponsive or feel spongy while the physical key still works, and the reported dealer fix is a complete replacement handle that has to be ordered in.
Jan 2023 – Mar 2024UK/EUall MG4 variants; cold-climate onset most reported (UK/Europe) so lower risk in most of AU
Sit down and wait for the dash to show READY before selecting a gear, because the MG4 has no start button and instead arms off a driver's-seat occupancy sensor, which catches new owners out.
Aug 2023AUall MG4 variants
An Australian MG4 Excite 51 owner reports the doors need a firm slam, and when one hasn't latched the car simply ignores an attempt to shift from P to D — re-slamming the door harder doesn't help either. His fix is to get out, lock the car and unlock it again, after which it selects Drive normally. This is a single owner report, so treat it as a cheap thing to try before assuming a shifter or gearbox fault.
date not establishedAUDoors closed gently rather than slammed; car sits in Park and won't select Drive all variants
Not every MG4 has one-touch up and down on every window. Owners report the higher trim getting one-touch on all four, while the lower trim has full one-touch only on the driver's window and needs you to hold the switch on the others. If you have moved from a higher-specified car and think a window switch is faulty, check the trim difference before booking it in.
Aug 2024UK/EUReported using UK trim names; the equivalent split across Australian variants is not established, so all variants are listed
What arrives with an Australian MG4 is modest: a soft case containing the slow charger that plugs into an ordinary home power point, the front and rear plates including the blue EV triangle, and a delivery gift. There is no V2L adapter and no fast AC cable. Owners are advised to buy V2L cables, dashcams, tinting and coatings from third parties rather than taking dealer accessory pricing, unless the dealer is throwing them in.
Sep 2024AUAustralian deliveries as of 2024; applies across the range all variants
The advice from an Australian buyer is to go over the paint and bodywork carefully at collection for scratches, chips and hail damage, and to actually read the double-sided pre-delivery inspection sheet to confirm the dealer completed what it lists. Cars sit outside in compounds and on transporters, and once you have driven away, establishing when a chip happened becomes your problem. It is also worth negotiating a complimentary 1000 km checkup while you still have leverage.
Sep 2024AUAustralian delivery process; applies across the range all variants
Worth checking on the test drive if you regularly carry people in the back. An Australian owner's main complaint about the car was rear amenities: a single USB socket, no rear air conditioning vents, and three rear headrests that obstruct the view through the interior mirror. None of these is a fault, but they are the kind of thing you notice every day once you have bought it and cannot change afterwards.
Oct 2023AUAustralian Essence 64 2023; other trims and later model years may differ
The Excite 64 and Essence 64 share the same 61.7 kWh usable NMC pack, the same claimed 450 km and the same charging rates. What the Essence adds is equipment: 18 inch wheels, full LED lighting, heated seats, a leather steering wheel and blind spot monitoring. If range, performance or charging speed is what you are optimising for, the two are the same car and the cheaper one is the better buy. If you want the heated seats and blind spot monitoring, that is what you are paying the difference for.
Mar 2024AUAustralian Excite 64 and Essence 64 as specified in 2024
Owners report that leaving a door open causes the car to revert to Neutral, described as an anti-theft and anti-rollaway behaviour. It is a sensible design and it catches people out exactly once, usually when leaning out to reach a gate or a parcel locker and then finding the car will not move. If it happens to you nothing is broken; reselect the gear you want with the door closed.
2026AUReported by Australian owners; variant not identified as a factor all variants
Australian owners have reported dashboard trim arriving with bubbles in the surface and scratches, and have had replacements done under warranty. Like paint, this is far easier to have addressed if it is noted at handover than raised weeks later when the question of how it got there becomes arguable. Add the dashboard and interior panels to the list of things you actually look at before signing, alongside the paint and the charge flap.
Dec 2024AUReported on Australian deliveries; applies across the range all variants
An Australian owner was locked inside his own car for five minutes. When the MG4 is deadlocked, the interior central unlock button and the door handles stop working, and the only way out is the emergency release which needs the metal key extracted from the fob, something you cannot do if you are inside without the fob. The specific hazard is that MG deadlocks on a single press of the lock button, where most manufacturers require a double press precisely so it cannot happen by accident. If anyone might be in the car, or might get in while it is locked, take that difference seriously.
Dec 2023AUReported on an Australian car in 2023; locking behaviour assumed common across the range but not confirmed per variant all variants
UK owners have reported the auto-closing boot trapping occupants. Powered tailgates are supposed to detect an obstruction and reverse, and that protection is not infallible on any car. The practical advice is the same as for any powered closure: keep hands, heads and children clear of the aperture while it is moving, and do not rely on the obstruction sensing to catch you. If yours has closed on something without stopping, that is worth reporting.
2023UK/EUReported on UK cars fitted with a powered tailgate; not all variants have one
A specific accessibility complaint from UK owners: the door sill edge is sharp enough to be a problem, particularly for drivers under about five foot three who have to negotiate more of it getting in and out. It is the kind of thing that never appears in a review and that you will notice several times a day for as long as you own the car. If you are shorter, get in and out several times on the test drive rather than just sitting in it.
2023UK/EUReported on UK cars; body structure common across the range all variants
The MG4 has no start/stop button, which catches people out when they just want to switch everything off without locking up and walking away. Owners point out you can power the car off from the central screen, and then press and hold the home button to turn the central screen off as well. It is more steps than a single button, but it is the way to leave the car quietly powered down without triggering the locking-and-leaving behaviour.
Mar 2025GeneralOwner procedure; applies across the range all variants
The MG4 uses an integrated brake system with no vacuum servo. MG's description of normal braking is explicit: a shut-off valve closes so fluid from the master cylinder cannot reach the calipers, and a solenoid instead routes it to a pedal simulator, which is the entire source of the pedal feel under your foot. Displacement and pressure sensors measure how far and how hard you push, software interprets that as a braking request, and a brushless motor builds the actual pressure at the four calipers. Under regenerative braking the same thing happens, except that if the drive motor can supply enough deceleration on its own the pressure-building motor never runs. This is manufacturer confirmation of three things owners have reported: pedal feel genuinely differs between drive modes because it is synthesised, the friction brakes come in later in the travel because regen does the first part, and pressing the brake pedal really does recover energy rather than wasting it.
2023GeneralBrake system operating description from MG's UK/EU training material; the IBS system is fitted across the range. all variants
MG documents a failure braking mode. If the electrical module fails completely, the shut-off valve — which is normally open when unpowered — stays open, so pressing the pedal sends fluid from the master cylinder straight to all four calipers. You keep braking. But with no motor building pressure, no vacuum servo and no pedal simulator in the loop, the pedal will feel hard, travel further and need a great deal more effort than you are used to, and there is no anti-lock or stability assistance behind it. Worth knowing in advance, because in this car a total brake-electronics failure does not feel like a normal brake failure: the pedal will feel wrong long before it feels absent.
2023GeneralFailure mode described in MG's UK/EU training material; applies to the IBS brake system fitted across the range. all variants
MG spells out an emergency braking function most owners never read about. If the car cannot be stopped with the brake pedal while driving, pulling the electronic parking brake switch upward and holding it gives the module a continuous apply signal rather than a momentary one, and it starts a controlled emergency braking process. During that process the system modulates the force at the rear parking brake actuator specifically to stop the rear wheels locking. Releasing the switch, or pressing the accelerator, cancels it. MG also notes the parking brake can be applied at any time when the car is stationary, whatever position the start switch is in.
2023GeneralEPB emergency function from MG's UK/EU training material; the electronic park brake is fitted across the range. all variants
MG gives the full decoding of the parking brake indicators, and it matters because the same red symbol means two very different things. Red lit steady in the EPB switch and in the instrument pack means the parking brake is applied. Red flashing in the instrument pack means the parking brake has failed. A steady yellow EPB warning lamp means there is a fault in the electronic park brake system. And a green lamp in the instrument pack is not the parking brake at all — it means Auto Hold is active. So a red light you glance at on the way out of a parking space is worth a second look to see whether it is steady or flashing.
2023GeneralIndicator meanings from MG's UK/EU training material; cluster symbols are a vehicle characteristic. all variants
The MG4's electronic park brake has a start assist function that judges when you intend to move away and releases the parking brake for you, using the slope angle and the motor torque output so the car does not roll back on a hill. MG lists the conditions that must all be met for it to work, and the first one is that the driver's seatbelt has been fastened; the others are that the vehicle is running, the selector is in drive, and the accelerator is pressed. So if you find the parking brake stubbornly staying on as you try to pull away, check your belt before you book a service visit. MG also notes that this is a different function from hill start assist, which is what briefly holds the car while you move your foot from brake to accelerator.
2023GeneralEPB start assist conditions from MG's UK/EU training material; a vehicle control characteristic rather than a market feature. all variants
"Acceleration deviation" - the car steering itself off line when you put the power down - gets one of the shortest procedures in the whole volume. There are two steps. Check that the tyre pressures are balanced side to side and correct them if not; if the pull persists, check the wheel alignment data. That is the entire list. Given the MG4 is rear-driven and puts its torque down instantly, MG evidently expects unequal pressures alone to be enough to make the car pull under power. A tyre gauge and five minutes on the driveway rules out half of MG's own diagnosis before you pay anyone.
May 2022GeneralMG4 EV Guided Fault Finding, Suspension System, Acceleration Deviation (p67) - UK/EU document all variants
MG's rear-suspension procedure for a car that will not track straight runs to thirteen steps. Step one is to inspect the wheels and tyres and rotate them. Steps two to twelve work through the rear upper and lower swing arm bushings and arms, the trailing arm bushing and arm, the rear spring, the damper, the wheel bracket, the hub and the subframe. Only at step thirteen does MG check the wheel alignment data, and if that is normal the trail leads on to the steering system. This is close to the opposite of the usual first move, which is to book an alignment. MG's own book says a wandering MG4 is more likely to be a worn bush or a tired tyre than a geometry setting - so if an alignment cured your pull only for it to come back, that is consistent with the manufacturer's expectation.
May 2022GeneralMG4 EV Guided Fault Finding, Suspension System, Vehicle Off-track (p70-71) - UK/EU document all variants
For braking deviation - the MG4 dragging to one side when you press the pedal - MG's very first check is the brake pad for dirt or an oil stain. Only then does it move to whether a disc is below its service thickness or running out of true, then to a caliper that is stuck or distorted, then to a blocked or leaking brake line, and finally to the master cylinder. Contamination coming first is worth knowing: it means a pull under braking is not automatically a sign that your brakes are worn out. It can be something as ordinary as grease or fluid that has found its way onto one pad.
May 2022GeneralMG4 EV Guided Fault Finding, Brake System, Braking Deviation (p78) - UK/EU document all variants
Judder or shudder felt through the pedal under braking gets a three-step procedure. Check the pad for dirt or oil contamination; check the disc for abnormal wear, meaning front or rear thickness below the service limit or runout beyond the maximum; and check the caliper for damage. That is all MG lists. The important part for owners is that MG measures runout - how far the disc wobbles as it turns - rather than talking about "warped" discs. On a car where regeneration means the friction brakes are barely used and the discs corrode, surface pitting and scoring translate directly into runout, which is why judder often shows up after a period of light use or long storage.
May 2022GeneralMG4 EV Guided Fault Finding, Brake System, Brake Judder (p79) - UK/EU document all variants
Brake drag - the brakes staying partly applied, showing up as heat, smell, or an unexplained drop in efficiency - gets a six-step list that starts somewhere unexpected. Step one is the brake pedal and its spring, checked for distortion or age. Step two is whether the brake pipeline is blocked in one direction, so pressure gets to the caliper but cannot bleed back. Only at step four does MG reach the caliper being distorted or stuck, then the master cylinder, then the booster. For an electric car this is worth knowing, because dragging brakes quietly cost you range and eat pads, and the two things MG expects first are both away from the wheel where owners naturally look.
May 2022GeneralMG4 EV Guided Fault Finding, Brake System, Brake Drag (p85) - UK/EU document all variants
A shudder or shake felt when you brake is filed under the steering system in MG's manual, not the brake system. The path is: check the outer track rod end for wear, then the inner track rod, then the steering intermediate shaft for wear or looseness, then the steering rack itself. Only when all four have been cleared does the manual explicitly redirect the technician to the brake system's own judder diagnosis. That is the manufacturer stating that worn steering joints are a more likely explanation for braking judder than warped discs. It is a useful thing to know on an MG4 in particular, because the car's regenerative braking means the friction brakes do relatively little work, so "it must be the discs" is a weaker assumption here than on a petrol car. If you are quoted for discs to cure a brake judder, it is fair to ask whether the track rods and the steering shaft were checked.
May 2022GeneralMG4 braking judder cause order; source is a UK/EU repair-information release. all variants
Two complaints owners describe often - the steering feeling unusually heavy, and the wheel not returning to centre on its own after a corner - each have a very short cause list in MG's manual, and both begin with the tyres. For heavy steering the suspension-side check is only three items: tyre pressure, then whether the bearing at the top of the front strut has seized, then wheel alignment. For poor self-centring the first check is simply whether a tyre is under-inflated. Only after those does MG send the technician to the steering side, where the expected causes are a seized steering shaft, a worn rack or a sticking column. Given that MG4s have been delivered with badly under-inflated tyres, this is worth doing yourself with a gauge before you book anything.
May 2022GeneralMG4 Electric first generation; UK/EU documentation, symptom-cause logic is a vehicle fact all variants
Two of the most common braking complaints - the car pulling to one side when you brake, and a shudder felt through the pedal or the wheel - share the same opening check in MG's manual: look at the brake pads for dirt or oil contamination. Only after that does MG move to disc condition, and there the test is specific, being whether the disc has worn below its minimum thickness or whether it runs out of true by more than the allowed amount. A stuck or damaged caliper comes next, then the pipework and master cylinder. The useful takeaway is that a judder or a pull is not automatically a warped disc or a failed caliper; contamination, often from a fluid leak or grease picked up during a service, is what MG expects to find first, and that is a much cheaper outcome.
May 2022GeneralMG4 Electric first generation; UK/EU documentation, symptom-cause logic is a vehicle fact all variants
MG treats the complaint of a wheel locking and the ABS activating when you have barely touched the pedal as a recognised fault with only three expected causes: a brake pad that has not been fitted correctly, a caliper that is sticking, and a damaged master cylinder. The pad-fitment answer is the interesting one for owners, because it points straight at recent work. If your MG4 starts chattering and shuddering through the pedal on light braking shortly after a pad change, a service or any wheel-off job, MG's own expectation is that the pad may simply be in wrong. That is a warranty or comeback conversation with whoever did the work, not a mystery to live with, and it is a safety issue because braking becomes unpredictable.
May 2022GeneralMG4 Electric first generation; UK/EU documentation, symptom-cause list is a vehicle fact all variants
Sit at a red light with steady pressure on the brake and notice the pedal gradually creeping towards the floor, and you are describing a symptom MG has its own diagnostic procedure for. The expected causes are a leaking brake pipe, a leaking master cylinder, or air in the system - all three of them faults that reduce your ability to stop, and none of them something that improves on its own. MG's separate procedure for a pedal that drops away quickly lists much the same short set. It is also notable that even though the MG4's pedal normally works through an electronic simulator rather than pushing fluid directly, MG diagnoses pedal-feel complaints as ordinary hydraulics: pads, discs, fluid and air. So a sinking or spongy pedal should be treated as a conventional brake fault and looked at promptly.
May 2022GeneralMG4 Electric first generation; UK/EU documentation, brake hydraulics are a vehicle fact all variants
A shudder through the wheel when you brake is usually blamed on warped discs, and on an MG4 with lightly used rear brakes that is a reasonable guess. MG's own order is different. "Shaking When Braking" sits in the steering chapter, and the first three checks are the outer track rod ends, the inner track rods and the steering intermediate shaft, looking for wear or looseness. Only after the steering gear itself has been cleared does the procedure hand off to the brake system's own judder routine. So if a workshop has skimmed or replaced discs and the shake is still there, the manufacturer's next place to look is the steering joints, not more brake parts.
2022GeneralSteering-wheel shake felt under braking on the first-generation MG4 all variants
The MG4's parking brake motors are built into the rear calipers, so the caliper has to be wound back electronically before pads or a disc can be changed and re-adjusted afterwards. MG's refit sequence makes that explicit: reconnect the battery, then use a scan tool to adjust the electronic park brake system, and only then pump the brake pedal several times to take up the rear pad clearance. That makes rear brakes a job for someone with a tool that can drive the EPB, not a hand-tools-and-a-Sunday job, and it is worth asking an independent workshop whether they can do the electronic step before you book rear pads or discs. Skipping it can leave the parking brake weak or the pads dragging, which on this car also shows up as extra energy use.
Jul 2023GeneralRear brakes only - the front calipers have no parking brake motor. all variants
Two ordinary steering repairs in this manual end with an instruction to perform a self-learning for the electric power steering module: replacing a track rod end, and any job that disturbs the clock spring and stalk assembly behind the steering wheel. The reason is in the same manual's description of the system - the steering angle sensor is built into the rotary coupler in the column switch assembly, and the torque sensor sits in the rack, so the module's idea of centre is something it learns rather than something mechanical. The alignment chapter then lists an EPS and torque sensor position that has not been properly calibrated as one of the causes of a car drifting off line on a straight, flat road. So if your MG4 has had track rods, a rack or column switchgear replaced and has pulled or felt off-centre ever since, the missing step may be a tool procedure rather than another alignment.
Jul 2023GeneralMG4 EV, July 2023 workshop manual, steering service guide and wheel alignment (manual p289, p297, p300) all variants
MG publishes a short, specific procedure for a steering wheel that is not level when the car is going straight, and it works entirely at the two outer track rods: loosen the locking nut on each side and turn both rods the same way by one flat of the hexagon at a time, repeating until the wheels point ahead with the wheel centred. Nowhere does it suggest removing the steering wheel and reindexing it on the splines, which is the shortcut some workshops reach for. That matters because moving the wheel on its splines leaves the car's own idea of straight ahead in the wrong place and puts the rack off centre, which is exactly the condition the alignment chapter blames for a car that wanders. If your MG4 came back from an alignment with the wheel sitting off, this is the fix to ask for by name.
Jul 2023GeneralMG4 EV, July 2023 workshop manual, Steering Wheel Positioning Adjustment (manual p293) all variants
The steering component layout in this manual shows an unbroken mechanical path from the steering wheel through the column, the intermediate shaft and a universal joint into the rack's input shaft. The electric motor adds assistance to that mechanism rather than replacing it. MG's description then says that if the system detects a failure the power assist is cancelled automatically and the steering warning lamp comes on. In practice that means a power steering fault leaves you with a car that is very heavy to steer, particularly at parking speeds, but still steerable and controllable - it does not leave you with no steering at all. Slow down, avoid tight manoeuvres and get it looked at rather than treating it as a car that must be recovered from where it stands.
Jul 2023GeneralMG4 EV, July 2023 workshop manual, steering layout and EPS description (manual p280, p283, p285) all variants
The manual's recovery instructions matter to owners because the recovery driver may not know them. MG expects a specialist to lift the driven (rear) wheels clear on wheel-lift equipment so the road cannot spin the drive motor, and where the car is dragged on its wheels it sets a hard ceiling of 30 km/h and 50 km. The parking brake must be released, the hazards switched on and nobody may ride in the towed car. Threaded towing eyes screw into covered points at the front and rear and are stored in the vehicle tool kit. A car whose airbags have deployed must be suspended or trailered rather than towed on its wheels. On a transporter, MG wants P selected, the parking brake applied, chocks and anti-slip pads at the wheels, and lashing straps passed around the wheels rather than over the body.
Jul 2023GeneralFirst-generation MG4, all variants; recovery and transport
An XPOWER owner's scored rear discs were declared normal after the dealer's engineer found the identical condition on the dealer's own test car; several owners in the thread report the same scoring and corrosion because regen does nearly all the braking and the rear friction brakes barely get used.
May 2024UK/EUall 2023 MG4 (reported on XPOWER)
XPOWER owners shopping for upgraded brakes found only standard-replacement discs (Apec, Febi/Blueprint — rear part ADBP430240) and no EBC catalogue entry at all; the sole genuine upgrade found was a D2 Racing 8-pot front kit sold via MacG Racing.
May 2026UK/EUXPOWER only
An XPOWER owner hunting front pads at 26,000 miles found no proper aftermarket listing: Brown & Gammons quoted about £275, with UK MG Parts, AliExpress or ordering direct from SAIC in China named as the only alternatives.
Nov 2024UK/EUXPOWER only
H&R makes 30mm-drop lowering springs for the MG4 XPOWER (part 28559-2), announced on MGEVs in Dec 2023 at ~£250. Eighteen months of thread later not one fitted ride report had surfaced — eBay showed two sets sold by Jun 2024, and the only forum owner known to have bought a set resold them unused after a suspension specialist warned of camber/alignment problems on the multilink rear.
Dec 2023AU+UKall 2023 MG4 (two part numbers: standard + XPOWER)
Owners on MGEVs can't point to any uprated sway/anti-roll bars for the MG4 — salty doubts anyone makes them for the X Power "yet" — even though beefier ARBs are exactly what jpk recommends first for cutting body roll without losing comfort. The workaround jpk offers: a regular MG4 can retrofit the factory XPOWER's uprated suspension parts, while XPOWER owners must wait on the aftermarket.
Mar 2024Generalall 2023 MG4
Owners noticing the pedal go soft are not imagining it and the car is not faulty. In Sport the pedal has short travel and a firm, immediate feel. In Normal it is longer and softer. In Eco it is softer still and needs noticeably more force before much happens. The prevailing explanation among owners is that the efficiency-focused modes are tuned to keep momentum, so both the accelerator and the brake are deliberately made less sharp. If you dislike the vague feel, switching to Sport changes it immediately.
Aug 2023GeneralReported on a UK Standard Range but described as mode behaviour rather than variant behaviour all variants
Worth stating plainly because it is often got wrong, including in reviews: the single-motor MG4 is rear-wheel drive, with the motor mounted just forward of the rear axle, and owners cite a weight distribution close to 50:50. That layout is a large part of why the car handles better than its price suggests, and why its behaviour at the limit is different from the front-wheel-drive hatchbacks it competes against. The XPOWER adds a front motor and becomes all-wheel drive.
Oct 2024GeneralSingle-motor variants are rear-wheel drive; the XPOWER is all-wheel drive
The critical consensus on the XPOWER is consistent: enormous straight-line speed, and a chassis and braking system that were designed for a much less powerful car. A prominent review called it the least hot-hatch-like hot hatch, noting brake temperatures climbing under hard use and little reward in corners. A rally driver's assessment was more forgiving on fun but agreed on the limitations. Buy it for the acceleration, not for the handling, and treat repeated hard braking from speed with caution.
2024GeneralXPOWER dual-motor only
Two Australian owners driving the same model on open highways independently describe the MG4 being unsettled by wind and needing correction, with steering they describe as imprecise and lacking feel. It is a characteristic rather than a fault, and it interacts badly with the lane keep assist, which is also making its own corrections in the same conditions. On a windy day on an open road, turning lane keep off leaves you with fewer competing inputs to manage.
Dec 2023AUReported on Australian Essence 64s at highway speed
The MG4 blends regenerative and friction braking, and the first part of the pedal is mostly regen. One owner puts the changeover at around twenty percent of available regen before the friction brakes begin to contribute. That is why the pedal can feel long and vague without anything being wrong: for gentle stops you may never reach the friction brakes at all. It also explains why the feel shifts between drive modes, since each mode prioritises regen differently, and why the rear discs see so little work.
Aug 2023GeneralDiscussed on UK cars; blending behaviour described as general to the model all variants
The dual-motor XPOWER makes 320 kW but an Australian review judged the suspension to be the limiting factor, describing it as letting the performance side of the car down, with traction problems under hard acceleration. The chassis and tyres are essentially those of a much less powerful car. If you are buying the XPOWER for the performance, budget for tyres at minimum, and treat full-throttle starts on anything less than dry grippy tarmac with respect.
Apr 2024AUAustralian XPOWER dual-motor only
A characteristic worth discovering on a test drive rather than after purchase. The MG4's steering rack is geared slowly, requiring noticeably more wheel movement than most drivers expect for ordinary turns, and the squared-off wheel rim changes where your hands fall. Some owners never notice; others find low-speed manoeuvring and parking tiring because of the amount of winding involved. It is a design choice rather than a fault, and there is nothing to adjust.
Dec 2024AUReported on Australian cars; steering geometry common across the range all variants
For no sound or unclear sound while the display, controls and playback all look normal, MG's instruction is to set all channels to output, cancel mute, start something playing and then simply count what is working. If nothing at all makes a sound, the manufacturer's expectation is that the head unit is at fault. If one or more but not all of the speakers are silent, it is those speakers. That is a triage any owner can do in the driveway with the fader and balance controls, and it is worth doing before booking anything: arriving at the service desk able to say "front left is silent, the other three are fine" points straight at a speaker rather than at an expensive head unit replacement.
May 2022GeneralMG's own owner-repeatable triage for a silent or unclear stereo; UK/EU document, method not market-specific. all variants
When the complaint is that no warning sounds for an obstacle, MG's second diagnostic step has nothing to do with the sensors. It tells the technician to play music or the radio and check the speakers work normally, and if they do not, to go and fix the audio system first, cross-referring to the entertainment chapter on no or unclear sound. In other words the parking chime comes out of the car's ordinary speakers rather than a dedicated buzzer behind the trim. Two practical consequences. If your parking beeps have gone quiet, check the stereo works and is not muted before assuming a sensor has died, because MG expects that to be the cause often enough to make it step two. And if you are changing speakers, adding a DSP amplifier or otherwise working in the audio path, you are also working in the parking warning path, so reverse the car somewhere safe afterwards and confirm you can still hear the beeps at a sensible volume.
2023GeneralDiagnostic step from MG's UK repair information; describes how the warning is routed in the car, not a market setting. all variants
The 4-speaker trim (UK SE = AU Excite) has 2 front-door speakers and 2 dash tweeters only; an owner who pulled the rear door card found no speaker cable in the door at all, so adding rear speakers means running new wiring from scratch.
Jan 2023AU+UK4-speaker trims (UK SE = AU Excite)
Owners describe the factory system as harsh at volume, with sharp high notes and poor separation once you are up to motorway speed. The upgrade that transforms it is not more power but proper tweeters: owners fitting 6.5 inch component fronts and coaxial rears report vocals and cymbals becoming crisp and the stereo image improving dramatically. The doors need roughly 34 mm deep spacers to take aftermarket speakers, and the standard head unit drives them without an amplifier.
Mar 2023UK/EUDiscussed on a Trophy but the door and head unit points were given generally; variant not identified as limiting
Owners who upgraded speakers consistently report that the deadening made the bigger difference, pulling the low end together and tightening everything up, because a standard door panel is an unsealed and resonant box. The specific advice from owners who have done it is to use closed-cell foam such as neoprene rather than mineral wool, since mineral wool will hold moisture inside a door that is designed to get wet.
Mar 2023UK/EUReported on UK cars; applies to any MG4 door all variants
The MG4's factory tweeters are not driven by a separate crossover. Each stock tweeter has a small capacitor built into it and simply taps the same wire that feeds the door mid-bass. So if you fit a component set you must install that set's passive high-pass crossover between the dash wiring and the new tweeter, or it will not filter correctly. The door woofer, by contrast, just reconnects to the existing factory speaker wiring; most owners leave the crossover's low output unused and report the doors still sound full-range.
Jan 2024GeneralStock tweeter has an integral cap and no external crossover; aftermarket tweeters must add the supplied passive crossover all variants
Owners who pulled the factory drivers found them rated around 25W RMS and 4 ohms, in a 6.5 inch size front and rear. To run cleanly straight off the built-in head unit without adding an amp, the advice is to stay with 4-ohm speakers and choose ones whose power handling is not wildly higher than stock - component sets around 90W RMS have worked well. Very high-power speakers are a poor match for the little factory amp.
Apr 2024GeneralFactory drivers ~25W RMS, 4-ohm, 6.5 inch; pick 4-ohm and moderate-power aftermarket to suit the stock head unit all variants
The most frequently fitted budget upgrade in this thread is the Vibe Slick 6C-V7 component set (tweeters, mid-bass and crossovers), which several owners across the UK, Australia and Europe ran directly from the standard head unit for around 80 euros with a clear improvement. The catch is build quality: one owner received a tweeter that rattled badly out of the box and had to dismantle and re-glue it, having already fitted it before finding the fault. Check and bench-test each driver before installing.
Feb 2024GeneralVibe Slick 6C-V7 a common ~EUR80 head-unit-friendly upgrade; multiple fits but reports of DOA/rattling tweeters all variants
Owners point to a free 3D-print adapter for fitting standard 6.5" aftermarket drivers in the MG4 front doors — Thingiverse's "MG4 Front Door Speakers Adaptor by Rev1616" (thing:6402439) — with install notes to drill and glue the screw holes, or better, epoxy in brass threaded inserts since superglue turns brittle on a vibrating door panel.
Aug 2024Generalall 2023 MG4 (front doors)
One owner's amp/sub install hit two walls: no line-level (RCA) outputs anywhere, and a head unit that won't output speaker signal unless it senses speaker-like resistance on the line — "Catch 22" in his words, since the new amp isn't recognised as a load until it's on. He solved it with an AudioControl LC2i Pro line-output converter; a second owner in the thread confirms the missing RCA outs.
Feb 2023Generalall 2023 MG4 (stock head unit)
The difference between the Excite and Essence sound systems in Australia is the addition of rear speakers and digital signal processing rather than a wholesale better system. An owner reports the standard tweeters are prone to clipping, and that replacing them outright is easier than trying to tune around them. Owners also note the XPOWER uses the same system as the Essence with the processing available. If sound matters to you, budget for tweeters regardless of which trim you buy.
2026AUAustralian Excite, Essence and XPOWER audio systems as described by owners; the Long Range 77 was not discussed
A common assumption is that speakers rated for hundreds of watts must be better. But the factory amplifier only puts out roughly 18-25W per channel from a 12V supply, and high-power-handling speakers are usually less sensitive, needing more watts for the same volume. Fit them without adding an amp and you can find the maximum clean volume has actually dropped, with distortion setting in earlier on the dial. Sound quality at normal levels may still improve; you just should not expect them to go louder.
Aug 2024GeneralLow-sensitivity high-wattage speakers on the stock amp can reduce max clean volume all variants
Tweeters advertised as genuine Bose parts for MG/SAIC cars turn up on auction sites and are described as a direct plug-in replacement for the dash tweeters using the supplied cables, with no separate crossover to fit. One owner who fitted them said the difference was obvious straight away, but noted they only really pay off once the door speakers are upgraded too, since better tweeters expose weak mid-bass. Several other owners were interested but had not confirmed the sound.
Jul 2024UK/EUClaimed genuine Bose tweeters as a no-crossover direct dash swap; one confirmed fit, needs door speakers too all variants
For a tweeter-only upgrade, owners on the European forums fit Hertz C26 tweeters into the original dash bracket using a 3D-printed adapter, then cut the back off the old tweeter and glue it onto the new one so the factory plug still connects, avoiding any wire cutting. The owner who did this to a base car reported a big jump in clarity and stereo separation, close to a good factory hi-fi, though still short on outright loudness.
Oct 2024UK/EUHertz C26 tweeters fit the stock bracket via a printed adapter and reused plug; big clarity gain, limited volume all variants
Cosmetic defects are on their own short clocks in the exceptions table: cosmetic trim 12 months, cosmetic paint including the alloy wheel finish 36 months, and a glass crack just three months or 1,000 miles. Separately the paint warranty proper runs three years or 60,000 miles and covers blistering, peeling, cracking, discolouration and staining of visible painted body panels caused by a manufacturing or material defect. The message for an owner is to inspect trim and paint properly in the first year rather than living with it: bubbling dash trim, a lifting piano-black panel or a poor paint finish is a first-year conversation, and a stone chip or environmental fallout is excluded no matter when you raise it.
Oct 2021UK/EUCosmetic and paint warranty terms; UK statement. all variants
MG's paint bulletin SI-TB2023102601 lists the MG4's factory colours against a three-letter paint code and a matched refinish code: Dover White (WSB), Pebble Black (PBC), Diamond Red (RSJ), Medal Silver (SSA), Brighton Blue (JAY), Fizzy Orange (NFZ), Andes Grey (PAG) and Hunter Green (GWH). It also tells refinishers where to get the mixing formula - registering on the paint supplier's online service and searching the code. The practical point for an owner is that the three-letter code, which is on the car's identification label, is what a paint supplier or body shop actually needs; marketing colour names are inconsistent between markets and years, and ordering touch-up paint by name is how you end up with a slightly wrong shade on a black car that shows everything.
Oct 2023GeneralEuropean paint bulletin covering several MG models; MG4 colour availability differs by market. all variants
The MG4 leaves the factory with several layers of corrosion protection you never see - galvanised steel, an electrophoretic dip, PVC underbody sealer over the floor and rear wheel arches, and cavity wax injected into the sills and lower door skins. MG warns that steam cleaning equipment generates enough heat to damage decorative parts and to soften or liquefy adhesives and anti-corrosion materials, and sets its own limits: keep the nozzle below 90 degrees Celsius, at least 300 mm from the panel, and never let it dwell in one spot. It also tells technicians outright not to remove underbody wax or paint during repairs, and to re-coat immediately if steam has been used down there. Worth knowing before you point a hot pressure washer or a steam lance up into the wheel arches to clean off winter road salt or beach sand.
Jul 2023GeneralCleaning and corrosion protection of the underbody; general to the model all variants
The manual carries a specific care regime for what it calls flat lacquer - matte paint. Wash by hand only, never with a rough sponge or heavy pressure, never in direct sunlight, and never with a high-pressure or steam washer; pre-rinse the dust off before touching the paint so grit does not drag across it, and use a neutral, wax-free shampoo. Bird droppings, tree resin, insect residue, grease and even fingerprints have to be removed straight away because MG describes the damage they cause as irreversible. Crucially, abrasives, polishes and polishing waxes are prohibited outright and the body must never be machine polished, so the usual detailer's answer of a light correction is not available to you. And a matte panel cannot be spot-repaired: MG says the repair requires the whole panel to be resprayed.
Jul 2023GeneralOnly relevant to cars finished in matte/flat lacquer; availability varies by market all variants
MG explains why some repainted panels start chipping soon after the work. The factory build has a stone-chip protection coating as part of its layer stack. In a repair, if the top coat is sprayed straight onto the electrophoretic coating of a new panel without the intermediate primer layer, or if a plastic part is sprayed without the flexibiliser that its hardness requires, the resulting film has reduced stone-chip resistance and will be knocked off more easily by stones and grit. It also sets out the correct treatment for a chip - remove the damaged film, feather the edges, fill, then intermediate primer and top coat, with any rust removed completely first - which is more work than the touch-up bottle most owners reach for.
Jul 2023GeneralPaint repair quality issue; applies to any repainted panel on the car all variants
What looks like a black plastic moulding along the A, B and D pillar sections of the door frames is actually an adhesive decorative film applied over painted metal. MG's procedure is to tear the old one off and throw it away, degrease the paint with a fifty-fifty alcohol mix, then squeegee a new film on from the top down, wrap the excess around the frame edges and trim the corners. It cannot be lifted and re-stuck without risking bubbles and creases, and MG allows a rework window of only about 24 hours before adhesive residue becomes a problem. For an owner this reframes two things: bubbling, lifting or whitened black trim is a consumable finish rather than a broken part, and it explains why pressure washing close to the frame edges, aggressive polishing, or peeling at a lifted corner makes it worse. Replacement also means removing the window outer weatherstrip and upper moulding, so it is not a five-minute job.
Jul 2023GeneralAll MG4 variants; front A and B pillar and rear B and D pillar door frame trim
Owners inspecting MG4s report the lower sill spot-welded flange has minimal paint and no stone-chip undercoat exactly where a jack goes, and surface rust starting on the cross member under the radiator. The often-quoted 'corrosion well advanced on three-year-old cars' line is an MOT tester's remark about modern cars generally — thin pressed-steel cross members and suspension arms rotting before the joints wear — not a finding on MG4 subframes, so do not read it as a measured MG4 defect. The community's answer is an aftermarket wax injection or Waxoyl treatment early in life; one 72-plate owner at 42,000 miles reports his sill spot welds are still corrosion-free after doing exactly that. If buying used, get it on a hoist.
Nov 2025UK/EUMG4s around 3 years old, especially where roads are salted or coastal
One XPOWER owner reports a professionally applied Gtechniq ceramic coat left the matte finish unchanged — posters agree its real benefit is easier cleaning, and it does nothing for stone chips. Another owner's DIY PPF on the bonnet came out with "more air bubbles than a bar of Aero"; the thread's consensus is professional PPF, since a chipped matte panel is near-impossible to colour-match.
Jun 2025GeneralXPOWER only (matte finishes)
Two UK SE owners fitted the genuine Trophy (= Essence in AU) twin rear spoiler to non-Trophy MG4s, both paying £429 through MG dealer parts counters. One — quoted in-thread from an earlier MGEVs thread — waited 3 days for dealer delivery and noted "you need the side plastics as well"; the other had the three-piece kit (twin spoiler plus two vertical sections down the rear window) supplied already painted in the car's colour and says it is very easy to fit.
Aug 2023UK/EUExcite/SE trims fitting the Essence/Trophy part
This is the most common misunderstanding among owners spending money on paint protection. A ceramic coating makes the car easier to wash and much better at shrugging off bird droppings and tree sap, and it holds gloss. It does not meaningfully protect against stone chips or deeper scratches, because it is microns thick and impact is not what it is for. If chips are what you are worried about, ceramic is the wrong product and paint protection film is the right one. Coating over the top of film is a reasonable combination.
Oct 2022UK/EUReported on UK MG4s across trims; applies to any paint finish all variants
Owners of black cars report watermarks and swirl marks showing up very easily. The trap is having a coating applied before the paint has been properly corrected: one owner had a dealer apply a coating with no detailing beforehand and ended up with the swirls sealed under it and more obvious than before. Surface preparation before any coating is the part that determines the result, and it is the part a cheap package leaves out. If you are paying for a coating, ask what correction is included.
Oct 2022UK/EUReported on UK MG4s; worst on black, applies to dark colours generally
The MG4 has a headlight levelling dial on the dash numbered 0 to 3, where 0 is the default and highest setting and higher numbers aim the beam lower for a loaded car. Australian owners also report that factory alignment varies between cars, and that it can be adjusted properly via screws under the bonnet using the standard method of parking a measured distance from a wall. If you think your lights are aimed low or high, check the dial before assuming the headlights need work.
Mar 2025AUReported on Australian cars; dial fitted across the range all variants
Australian states handle the electric vehicle identification marker on the number plate differently: New South Wales uses a sticker format, while Victoria, South Australia and Queensland use an aluminium marker riveted to the plate. In Victoria it is a roadworthiness requirement rather than an option, and it is recommended nationally because it tells emergency responders at a crash scene that they are dealing with a high-voltage vehicle. Dealers sometimes hand cars over without it, so ask at handover.
Dec 2024AUAustralian state requirements; applies to any electric vehicle, not only the MG4 all variants
The MG4's interior uses a lot of gloss black plastic, which collects fingerprints, dust and fine scratches from the first week. It is the single most common interior complaint after the audio. There is nothing to fix; the practical response is a microfibre cloth in the door pocket, and avoiding dry-wiping it, since dust dragged across gloss plastic is what creates the fine swirls that never come out.
Mar 2023GeneralReported across trims; gloss black trim is used throughout the range all variants
UK owners reported two clear tiers of paint protection for a new MG4. A coating applied by the dealer at purchase (owners named products such as Guardx) cost around £200, and several were happy with it for years of low-effort washing with no polishing. A full job by an independent detailer, which includes proper machine paint correction first and a higher-grade multi-year coating (owners cited Gyeon), cost around £580 to £600 and took one to two days. The detailer route costs noticeably more, but the paint preparation is generally far better, and that prep is what makes the coating actually last.
Nov 2022UK/EUTwo price tiers for MG4 paint protection: dealer coat vs detailer with correction all variants
Owners read true state of charge and state of health, which the car's own display does not show, using a Bluetooth OBD dongle - the Vgate iCar Pro 2S is the recurring recommendation - with Car Scanner or ABRP.
Oct 2024UK/EUMG4 2022–2025, all variants
A UK MGEVs accessories thread from October 2024 converges on fitted aftermarket floor mats, a boot liner, mudflaps, LED interior bulbs, a centre-armrest storage box and a windscreen sun shade.
Oct 2024UK/EUMG4 2022–2025; sourcing notes are UK/AliExpress-centric all variants
Every 2023 Australian MG4 variant is rated to tow just 500kg braked, and that figure is trailer plus load, so a lightly loaded box trailer is about the limit and any caravan is out.
date not establishedAUall 2023 Australian MG4 variants — identical rating across the range
MG's August 2024 bulletin SI-TB2024081501 confirms that the MG4 is not supplied with an alcohol interlock, but that a dedicated connector is reserved for one on the facia harness behind the glovebox. Devices meeting the European standards EN 50436-1 or EN 50436-2 can be wired to it - five wires covering the detection result, the vehicle start status, an ignition wake-up feed, battery power and earth - with the control unit mounted in the passenger side lower trim and the handset placed in the glovebox where the driver can reach it. The part owners and installers most often miss is at the end: the function has to be activated afterwards with MG's dealer diagnostic system, and deactivated the same way before the device is removed. Once active, the cluster displays a prompt to pass the test and the car will not start until it is passed.
Aug 2024UK/EUMG Motor Europe bulletin referencing European alcohol interlock standards; installation is a dealer-level job requiring diagnostic activation.
Owners increasingly use a Bluetooth OBD dongle to read battery state of health and other data the dashboard will not show. MG's own symptom table explains the two ways that can fail. If the dongle gets no power at all, the first thing MG has a technician check is the diagnosis port's fuse, then the port's own wiring, power and ground - a blown fuse there kills the port while leaving the rest of the car completely normal. If the dongle powers up but cannot talk to the car, MG's suspects are the tool itself, the gateway module that sits between the port and the vehicle's networks, and the network's terminating resistance. So a dongle that suddenly stops working is worth checking against a second dongle and against the port fuse before anyone concludes the car has a fault.
May 2022GeneralMG4 diagnosis port and gateway, first-generation car; UK/EU document describing car architecture rather than regional process. all variants
MG treats "no power supplied to the scan tool" as its own symptom, and the first listed cause is a blown fuse for the diagnosis port, followed by loose or damaged wiring at the socket. A separate symptom covers a tool that powers up but cannot reach the car's networks, where the causes are the tool itself, the gateway module, and the network terminating resistance. For owners who use a Bluetooth or wifi dongle to read battery health and cell data, that is a practical distinction: a dongle whose light never comes on points at the socket's fuse, while a dongle that lights up but sees nothing points at the gateway between the port and the car's buses. Either way it is not necessarily a failed dongle.
2022GeneralUK/EU service volume; describes vehicle wiring, general to the model. all variants
In its list of causes of electrical interference the manual singles out incorrectly fitted non-genuine aftersales accessories by name - added lamps, amplifiers, motors, two-way radios, remote starters, alarm systems, onboard phones - and notes that these can generate interference while they are operating but produce no fault at all when they are switched off. Aftermarket add-on equipment also appears in MG's headline list of the causes of intermittent faults, alongside connectors, harnesses and driving conditions. That gives owners a genuinely useful home test for a gremlin that comes and goes: note whether the symptom only ever shows up while a particular added device is powered. The vibration section makes the same point mechanically, warning that an incorrectly fitted accessory can become a path that transmits and amplifies vibration from a rotating part into the cabin, using badly mounted pedals as its example.
2022GeneralMG4 EV first-generation; general electrical and NVH principle, not market specific all variants
Tucked inside the restraint system section is a short block headed as precautions for vehicle owners, and it is unusually direct. Never fit a cover to a seat that contains a side airbag. Do not place anything on the steering wheel or the instrument panel that could be thrown at you or punctured by an inflating airbag. Never fit an accessory that obstructs or impairs the seat belt pretensioners or the airbags. Only genuine accessory parts are to be fitted. The manual also warns against installing extra electronic equipment - it names mobile phones, two-way radios and in-car entertainment - in any way that could generate electromagnetic interference in the airbag circuit, and says to seek specialist advice before doing so. The same list states that children under 12 should not travel in the front seat. For a car with an active accessory market in seat covers, dash mounts and phone holders, that is worth reading before you buy.
2022GeneralMG4 EV first-generation; airbag safety principle, not market specific all variants
There is a short set of instructions aimed squarely at anything fitted to the car after it leaves the factory. MG says a self-tapping screw must never go straight into a body panel - fit a plastic insert first; that the edge of any hole drilled into a panel or chassis component must be treated with a zinc-rich or acid-etch primer and the surrounding area coated with protective wax; and that a painted metal accessory must not sit directly against the body unless something suitable separates the two, such as a weldable zinc-rich primer or a zinc strip. The message is that corrosion on this car usually starts where somebody made a hole or created a metal-to-metal contact point, which is exactly what a towbar, roof rack, mud flaps, a light bar or a bracket for a dashcam or aftermarket camera involve.
Jul 2023GeneralApplies to any accessory fitted to the body; not variant specific all variants
The MG4 ships with a tyre repair kit and no spare wheel, so decide in advance whether you will carry a repair kit or source an aftermarket space-saver.
Aug-Sep 2024AUAustralian MG4 2023–2025 all variants
Wireless CarPlay is not factory-fitted to the pre-facelift MG4, which covers every 2023 Australian variant, so the only route to it is an aftermarket adapter such as a CarlinKit Mini 5.0.
Nov 2025AU+UKall 2023 MG4 (aftermarket accessory, not a factory feature)
On the XPOWER tyre-upgrade thread, owners who moved off the original fitment to Michelin Pilot Sport 5 or CrossClimate 2 mostly report the vibration reduced rather than gone. The thread starter, asked directly whether his had been cured by the Pilot Sports, answered "Are the vibes gone? In a word....... No. Much reduced? Yes", and concluded the real cause was the driveshafts not being perfectly balanced — a year later he was calling it a manufacturing and quality-control problem in the driveshafts and suspension mountings. Rebalancing likewise "did reduce vibes, but did not dispel them completely". One owner does claim his CrossClimate 2s "solved the problem not only with regards vibration but also the grip", so a cure is contested rather than unheard of. Fit better tyres for grip and noise if you want them, but do not expect them to close out the vibration — push for the drivetrain bulletin instead of buying a second set.
Dec 2023AU+UKMG4 XPOWER on original Bridgestone fitment with high-speed vibration
Owners digging into roof bars found the MG4 carries no approved roof load in the UK at all, while a Norwegian owner posted documentation showing EU-approval cars are rated for 60 kg. One member warned that fitting a rack to an uncertified car could invalidate insurance, and nobody in the thread disputed it.
Dec 2022UK/EUall 2023 MG4
An Australian owner priced the genuine MG V2L adapter at A$250, gambled on a A$33.21 Chinese one (plus a A$6 socket adapter) and reports it "operates just the same as the genuine adapter". Another AU owner powered a motorhome's fridge, air-con, kettle and coffee machine off the MG4 for up to 3 nights, at roughly A$25 of electricity per 3 days.
Sep 2025AUall 2023 MG4 (V2L standard across AU range)
One owner found that attaching a Thule rack immediately deactivated lane assist, rear parking sensors and adaptive cruise (owners in the thread believe towing mode also disables autonomous emergency braking, to avoid jackknifing a trailer); several other owners, mostly Australian, report everything works normally so long as towing mode is left OFF.
May 2025AU+UKall 2023 MG4 with towbar
Towing capacity is 500 kg braked across the entire MG4 range, from the 51 kWh Excite to the XPOWER. That is a box trailer and not much more. It will not take a camper, a caravan, or most boat trailers, and the figure does not improve with the bigger battery or the dual-motor car. If towing is part of why you are buying, this is the specification that decides it.
Undated specification pages, retrieved September 2026GeneralSame 500 kg braked figure listed for the 51, 64 and 77 kWh cars and the XPOWER all variants
A cable specification that costs people half their charging speed. Australian owners are clear that a single-phase MG4 needs a 32 amp rated Type 2 cable to reach its full 6.6 to 7 kW at public AC chargers; a 16 amp cable limits you to about 3.68 kW no matter what the charger can supply. Owners also advise buying a cable at least five to seven metres long, since short cables will not reach in a lot of real car parks, and some suggest a three-phase rated cable for future-proofing even though the car cannot use it.
Sep 2023AUAustralian owners; the 32 amp requirement applies to all single-phase MG4 variants
The MG4 has no equivalent of a sentry or guard mode and no built-in recording, so if you want footage you are fitting a dash cam. Australian owners have found MG4-specific mounting options online at around $125, though some are configured for left-hand drive and need checking. Bear in mind that a dash cam wired for parked recording is one of the most common causes of a flat 12V on this car, so wire it to a switched supply or accept that it only records while you are driving.
Jul 2023AUAustralian cars; applies across the range all variants
The moulded shelf intended for a phone is smooth enough that a phone slides off it under braking or cornering, and owners report this happening even with a grippy case fitted. The usual fixes are a cut-to-size piece of non-slip matting, or fitting a proper phone mount and ignoring the shelf. Worth sorting early, because a phone sliding into the footwell while you are driving is a genuine distraction rather than just an annoyance.
Mar 2023GeneralReported on early Australian and UK cars; console design varies by model year all variants
The MG4's centre screen runs Android Automotive, and a community of owners installs additional apps onto it, most commonly to replace the built-in media player, which is widely disliked. This is not a supported activity and it is not for everyone, but it is worth knowing the capability exists if the stock software is your main frustration with the car. Anything you install this way is at your own risk and can be wiped by a dealer software update.
Apr - May 2026GeneralApplies to pre-2026 MG4s running Android Automotive; access routes vary by software version all variants
The factory head unit is tuned around the cheap stock drivers, so once you fit better tweeters, door speakers and sound deadening the frequency response is no longer balanced and the built-in 5-band equaliser has too little control to fix it. Owners chasing proper sound quality add a small DSP amplifier (one used a Match unit) that offers many-band EQ and time alignment to re-tune to the new speakers and the driver's seat. A plug-and-play wiring harness exists for the MG4 so the DSP can be fitted without cutting factory wiring.
Aug 2024GeneralStock 5-band EQ insufficient after upgrade; DSP amp with multiband EQ/time alignment is the fix, MG4 plug-in harness available all variants
The factory speaker openings will not take most aftermarket 6.5 inch drivers directly, so you need spacer or adapter rings. Owners share 3D-printed spacers sized for popular sets (files were posted for the Vibe set), and one owner without a printer adapted Vauxhall/Opel Zafira speaker mounts as a substitute, though they were a slightly loose fit. Watch mounting depth - the factory driver sits around 63mm deep, so a deeper aftermarket speaker may foul the door card and need a taller or shallower ring to clear.
Aug 2024General6.5-inch aftermarket speakers need spacer rings (3D-printed or adapted Zafira mounts); mind the ~63mm depth all variants
Owners wanting a clean, reversible tweeter swap looked for the matching dash plug and found it is a specific small two-pin automotive connector that is awkward to source, with long shipping and no easy local supply - one Australian owner could not buy it at home. The practical options are to build a harness from loose connector pins, buy an assortment pack and find one that fits, or simply cut the factory wires and use crimp or solder connectors, which most people ended up doing.
Jan 2024GeneralCorrect dash tweeter plug hard to source; owners splice the factory wires instead all variants
One MG4 owner reports the OBD port (under the steering wheel) is permanently live and powers his Nextbase dashcam through it via a splitter cable; another owner in the same thread went the fuse-box route instead, noting it takes "a little bit of fiddling to get to".
Apr 2025UK/EUall 2023 MG4
The MG4's cabin filter box was designed to hold two filters stacked, a HEPA filter on top and an activated charcoal one below, with air passing from the top of the box downwards. European cars were delivered with only one filter in place. Owners who want the full arrangement have had to source the second filter themselves, and a commonly tried off-the-shelf part is slightly undersized and needs modifying to fit.
Undated wiki page, retrieved September 2026UK/EUObservation made about European-delivered cars; Australian fitment not established, so all variants are listed
Owners running solar-aware or automated charging report that MG's Chargehub unit has an unreliable OCPP implementation, in one case refusing to go above 8 amps when driven by open-source charge control software, with bug reports to both MG and the hardware manufacturer going unanswered. If you intend to integrate charging with home automation or solar diversion, owners point instead at established third-party units. Buying the manufacturer's own charger is not automatically the safe choice here.
Jul 2024AUAustralian owners using MG's own home charger; independent of MG4 variant all variants
Underfloor boot storage on the MG4 is limited because of where the rear motor sits, and Australian owners find the supplied charger's carry bag too bulky to fit. The cable itself fits if you coil it and leave the bag at home. Several owners simply do not carry the granny charger at all day to day, on the basis that it is an emergency item they have never needed and it is taking up the only usable hidden storage in the car.
Sep 2023AUReported on Australian cars; boot layout common across the range all variants
A cheap improvement Australian owners make: replacing the dim interior wedge bulbs with LED equivalents, in one case around $20 for 90 lumen units from a chain auto store. The warning that comes with it is to be gentle inserting them, because the sockets are easily damaged and a broken socket turns a twenty dollar upgrade into a much larger job. Take the old bulb to the shop to match the fitting rather than guessing.
Sep 2023AUReported on an Australian car; interior lighting assumed common across the range all variants
The MG4 spans a fair weight range: about 1,710 kg for the 51 kWh car, 1,826 kg for the 77 kWh Long Range and 1,878 kg for the XPOWER. That is useful to know for anything that charges or restricts by weight, including some ferries, car parks with weight limits, and the rating of a jack or ramps if you work on the car yourself. It also explains why the heavier variants are harder on tyres and brakes than the numbers alone suggest.
Undated specification pages, retrieved September 2026GeneralPublished kerb weights for the 51 kWh, 77 kWh and XPOWER variants
One owner's persistent screen freezing was resolved by connecting two cables that had been left unconnected when an aftermarket rear-view camera was installed. The lesson generalises: the MG4's infotainment is more sensitive to badly integrated accessories than owners expect, and a fitting that appears to work can destabilise the system in ways that look like a software fault. If you have had anything wired into the car, revisit that installation before pursuing a warranty claim on the head unit.
Jul 2025GeneralOne owner's case; applies to any MG4 with aftermarket electrical accessories all variants
An owner of a base SR trim without a reversing camera found that the socket and wiring can be present, but plugging a camera in does not turn it on, because the feature is disabled in the car's software rather than missing in hardware. The lesson for buyers is not to assume a camera or similar feature can be added later just because the connector exists. If a reversing camera matters to you, buy a trim that has it fitted from the factory rather than counting on a retrofit.
Sep 2025UK/EUBase SR / entry trim without a factory reversing camera
One Australian owner's boot leak turned out not to be a car fault at all: the installer who fitted an aftermarket rear dashcam had failed to refit a panel or grommet correctly, letting water in. The dealer (Perth) identified it, was unhappy with the installer, resealed and dried the car, and supplied a loan car in the meantime. It is worth ruling out any recent aftermarket work such as a dashcam, reversing camera or tow bar before assuming the body itself is defective.
Jul 2024AUAftermarket dashcam install left a panel/grommet unsealed, causing boot water
When fitting door speakers, tuck the connector and any spare cable well clear of the window mechanism. One owner left the leads hanging out of the back of the speaker and the glass sheared them off the first time the window was wound all the way down. Route and secure the wiring so nothing sits in the path of the regulator or glass.
Jul 2024GeneralSlack speaker wiring behind a door speaker can be severed by the window regulator all variants
A 2023-delivered MG4 in Australia is covered by the earlier 7-year/unlimited-kilometre vehicle and battery warranty, not the 10-year/250,000km deal, which applies only to new MGs registered from 1 August 2024 to 30 June 2025.
date not establishedAUAustralian market; 2023 model year cars get the 7-year terms, not the later 10-year all variants
Each scheduled service must be completed within 30 days and 2,000km of the interval and done at an authorised MG dealer to hold extended cover, and a 24-month gap makes that window easy to drift past.
date not establishedAUAustralian market, all MG4 variants
MG Australia services the MG4 on an unusually long 24-month / 40,000 km interval, under a seven-year, unlimited-kilometre warranty.
Jun 2024AUAustralian MG4 2023–2024 all variants
Ask other local owners about a specific MG dealer before committing: dealer and after-sales handling is the recurring theme in the roughly 14 Australian MG4 reviews on ProductReview (3.1/5, checked August 2026).
Aug 2026AUAustralian MG4, all variants
In What Car?'s 2024 UK owner reliability survey the MG4 scored 63.8% and finished last of 18 electric cars; the same survey's 2026 run puts it at 89.3% and 12th of 19, so treat the 2024 figure as history rather than the current rating.
2024UK/EUUK survey data covering 2022-present MG4; MG as a brand improved to ~17th of 32 in the 2025 survey all variants
Your MG4 only needs a workshop visit every 24 months or 40,000km in Australia, but the fewer visits cost more each, so budget on the annual average rather than on the long interval.
Oct 2024AUall Australian MG4 variants; XPOWER costs $165 more over 7 years
Every software change on the 2023 Australian MG4 needs a dealer visit because there is no over-the-air updating, so ask for your current software version in writing and for all available updates to be applied.
May 2024AU2023 Australian MG4, all variants
Ask which version the car shows in its entertainment-system software string and request R11 by name, as that 29 September 2023 Australian release improved iSMART connectivity and adaptive cruise.
May 2024AU2023 Australian MG4; the OPM one-pedal campaign applies to 51kWh cars specifically
Book the service with a written list of the actual faults, such as Bluetooth dropping, a laggy or rebooting screen or over-eager lane keeping, because software goes on only when you ask about it by symptom.
Mar-Apr 2025GeneralSC077all 2023 MG4
Australian MG4 software updates are applied at a dealer rather than over the air, so ask your dealer to confirm your car's software level at its next service, including the R11 update of 29 September 2023.
May 2024AUall 2023 MG4, Australian market
MG's repair and maintenance information includes a labour time schedule for the MG4 listing about 1,135 individual operations, each with a code, a description and a standard time in hours, given separately for the standard, comfort and luxury specifications. Times from that schedule include renewing the cabin air conditioning filter at 0.2 hours, renewing the 12 volt battery at 0.4 hours, renewing the brake fluid at 0.7 hours, a set of front brake pads at 0.8 hours, a wheel alignment check and adjustment at 0.7 hours, a set of four tyres at 1.5 hours, a single tyre pressure sensor at 0.7 hours, and a front windscreen at 1.7 hours. Reprogramming and coding a tyre pressure sensor is listed separately at 0.4 hours.
2023GeneralThe schedule gives times for three specification levels rather than named Australian trims, and most times are identical across all three, so all variants are listed
MG's official labour time schedule allows 0.2 hours, which is twelve minutes, to renew the air conditioning filter, the item commonly called the cabin or pollen filter. The cover for that filter is listed separately, also at 0.2 hours. For comparison the schedule allows 0.2 hours for a windscreen wiper arm and 0.3 hours for the pair.
2023GeneralThe schedule lists the same time across all three specification levels, so all variants are listed
In Australia the Motor Vehicle Service and Repair Information Sharing Scheme, a right-to-repair law, requires MG to sell its technical service and repair information and its diagnostic tool access to any qualified repairer, not only its own dealers. MG publishes the process openly: independents apply through MG's technical information portal and request access by email. Access is tiered, from general technical information, to an EV high-voltage safety tier, to a security tier for keys and immobiliser work, and is sold as a paid subscription. In practice this means you are not locked into a dealer for servicing or diagnosis; a properly equipped independent can do the same work.
Nov 2025AUAU right-to-repair (MVIS): independents can obtain MG technical info and diagnostic tools; tiered paid access all variants
Several MG4 control modules, for example the body control module or the instrument cluster, cannot simply be swapped. The official SAIC programming tools reprogram the new unit, write its configuration and write the car's VIN into it before it will work; a bare part swap without this coding step will not function correctly. This is why module-level electrical repairs have to go to a workshop that holds the manufacturer's programming tool, whether an MG dealer or an independent that has licensed it, and why they can cost more than a like-for-like mechanical part.
2025GeneralModule replacement (BCM, instrument pack) requires manufacturer programming tool coding plus VIN write; not plug-and-play all variants
Australian-delivered cars left the factory on a software family that is entirely separate from the UK and European one, with its own numbering that starts much lower. Australian owners comparing notes on the forum keep concluding their car is dozens of releases behind a British car, when in fact the two numbering schemes cannot be compared at all. There is a claim that a service bulletin allows Australian cars to be moved onto the international software, and at least one Australian owner has run a European build, but the long-standing members warn against swapping families: the software is matched to the hardware modules fitted to that car, and the wrong family can cost you functions or leave the head unit unusable. The practical result is that a version number quoted by a UK owner tells you nothing about your own car.
Jun 2026AUAustralian-delivered MG4s, all variants, comparing software versions with overseas owners
Owners repeatedly book the car in asking for 'the latest software' hoping to cure lane assistance that wanders, a nervous adaptive cruise or a climate control that reads several degrees out, then are disappointed. The head-unit software governs the screen, media, phone projection and menus and nothing else. The steering assistance, cruise, climate and battery management each have their own controller with its own software, and those can only be reflashed with the dealer's diagnostic tool through the car's diagnostic socket - an owner USB update cannot touch them. When you book the car in, describe the behaviour you want changed rather than asking for an infotainment update, or you will get the wrong job done.
Feb 2026GeneralWhich module a given complaint actually belongs to, when requesting updates
For cars built from 2024, MG moved head-unit updating to the dealer's tool. Owners in Germany, Italy and Spain who bought the interface hardware and successfully updated every other module still could not get the head unit itself to take a newer version - the car rejects the file whatever folder layout or format they try, and months of experimenting produced nothing. Dealers have not fared much better: there are reports of workshops needing a replacement interface sent from China after a failed attempt. The result is a lot of 2024 and 2025 cars sitting on the version they were built with, with known annoyances - radio dropping out, the camera view not handing back to the home screen, screen brightness resetting - left unfixed.
Apr 2026UK/EU2024 and 2025 build first-generation cars, head-unit software updates all variants
MG Assistance is the free breakdown cover supplied with a new MG in the UK. It is not run by MG: the service is provided by the AA (Automobile Association Developments Ltd), with one element underwritten by a separate insurer. It runs for 12 months from the date of first registration, and the only other way it starts is by being activated following a service at an MG Service Partner - so it is a rolling 12-month benefit that depends on you going back to the franchised network. Have the car serviced by an independent garage, or skip a year, and the cover simply lapses. It attaches to the car rather than to you: anyone driving it with permission is covered, along with everyone travelling in it up to the legal seating capacity, to a maximum of eight including the driver. Because it costs nothing there is no refund if you cancel, and MG treats it as part of the All Component Warranty package, though cancelling the assistance does not cancel the warranty. If you hold your own AA membership as well, it is not automatically suspended while this is running.
Apr 2019UK/EUUK-only MG Assistance scheme; does not describe Australian roadside assistance or its duration. all variants
There are two very different levels of recovery in the booklet and it is worth knowing which one you are asking for. Plain Roadside Assistance only takes the car to the nearest MG Service Partner, or to a local destination of your choice provided it is no further away. Relay is the upgrade, and it applies when the AA cannot arrange a prompt local repair within a reasonable time: it moves the immobilised car, plus everyone who was travelling in it (up to eight people including the driver), to the nearest MG dealer or, if you are more than a quarter of a mile from home, to any other single destination in the UK you nominate. Two limits catch people out. You get one recovery per breakdown - a second or subsequent Relay for the same incident is not covered - and once the car has been moved, arranging and paying for both the repair and any further transport is entirely yours. Ferry and toll charges are excluded, as is the recovery of horses or livestock, and passengers who do not travel with the car get no help with their onward journey.
Apr 2019UK/EUUK breakdown cover terms; Australian roadside assistance operates under different rules. all variants
The quarter-mile line around your home address changes what you are entitled to. Beyond it, you are on Roadside Assistance and, if the car cannot be fixed, potentially on Relay and then Relay Plus. At or within a quarter of a mile of home you are on Home Start instead, and the booklet states plainly that Relay Plus - the hire car, the overnight accommodation and the public transport money - is not available from a Home Start situation. Home Start will send someone to try to fix the car and, if a prompt local repair is not possible, recover it to the nearest MG Service Partner or a location of your choice, whichever is nearer. But the section also lists an exclusion for recovery of the vehicle within a quarter of a mile of your home address, which reads as ruling out a short tow round the corner to your own garage or a local independent. Relay Plus is also unavailable after a road traffic accident, however far from home you are.
Apr 2019UK/EUUK MG Assistance; the home/away distinction described here is specific to this UK scheme. all variants
Relay Plus is the add-on that keeps your journey going after an immobilising breakdown more than a quarter of a mile from home, and you pick exactly one of three options. A temporary loan vehicle for up to 48 hours, with the benefit capped at the equivalent of a 1600cc saloon - the AA pays the hire charge, comprehensive insurance and collision damage waiver, while you pay fuel, any insurance excess and anything beyond the 48 hours. Or one night's bed and breakfast for the people who were in the car, limited to £100 a head and £300 in total, with meals other than breakfast, drinks and phone calls settled by you before you leave. Or reasonable public transport costs for you and up to seven passengers, on the same £100 and £300 caps, claimed in writing with receipts within 28 days of the breakdown. The hire car is not available at all to a driver under 18 or one who has not held a full UK licence for 12 months, the supplier may want a card deposit, and no replacement vehicle can be supplied with a towbar - so a caravan goes back on the Relay truck with your car.
Apr 2019UK/EUUK Relay Plus benefits and monetary caps; not applicable to Australian cars. all variants
Three procedural conditions decide whether the cover actually pays out. First, you must contact MG Assistance direct on its own number (0800 072 3338 in the UK); the terms state that MG Service Partners and garages approached independently will expect payment, you will have to settle the bill, and the AA is under no obligation to reimburse you - so do not let a passing recovery truck or a helpful dealer arrange it for you. Second, you must be present with the car when help arrives; the AA reserves the right to refuse to attend if the driver is not there, which rules out leaving a dead car at a charging bay and going home. Third, report the breakdown promptly - unreasonable delay in reporting is itself listed as grounds to refuse service. There is also a paperwork trap: if eligibility cannot be confirmed on the call you may be asked to sign a 'Promise to Pay' form covering the cost if it later turns out you were not covered.
Apr 2019UK/EUUK MG Assistance contact and claims process; not applicable to Australian roadside assistance. all variants
Two exclusions decide what happens when the car stops somewhere awkward. Service on private property - the booklet's own example is garage premises - can be refused unless it is established to the AA's satisfaction that the owner or occupier has given permission, so a breakdown in a private car park, a workplace yard or on someone else's land is not automatically covered. Separately, if specialist equipment not normally carried by a patrol is needed because the car has left the highway, is in a ditch, is standing on soft ground, sand or shingle, is stuck in water or snow, or has been immobilised by having its wheels removed, the AA will arrange the recovery but you pay for it. Once the car is back somewhere suitable, normal service resumes. Cover can also be refused if the car was, in the patrol's opinion, dangerous, overladen or unroadworthy before the breakdown, and if the police or another emergency service insist on immediate recovery by a third party, that bill is yours.
Apr 2019UK/EUUK MG Assistance exclusions; Australian roadside cover has its own separate terms. all variants
MG's European service book sets the new-car warranty at 84 months or 150,000 km from the date of first registration, whichever comes first, and it transfers to each new owner for whatever is left of it. The same 84 month / 150,000 km term - not a separate longer one - covers the high-voltage battery pack, the drive motor, the intelligent motor control unit and, on dual-motor cars, the secondary axle motor controller. That is a different deal from the Australian one, where the equivalent cover is unlimited kilometres, so a European owner's warranty can run out on distance in a way an Australian owner's cannot. Read UK and European forum advice about warranty limits with that difference in mind.
2023UK/EUWarranty term and covered main assemblies as printed in the UK/EU MG4 service book; Australian terms differ. all variants
The maintenance plan printed in the European service book runs on a 24,000 km or 12 month cycle, whichever comes first, stepping through 24/12, 48/24, 72/36, 96/48 and on out to 192,000 km or 96 months. The visits alternate between a Type A inspection and a fuller Type B. That is twice as often in time as the Australian schedule of 24 months or 40,000 km, so a UK owner and an Australian owner comparing service history are not describing the same maintenance regime. If you have a European-market book in the car, or an imported car, go by the interval printed in your own book rather than the local one.
2023UK/EUScheduled service intervals in the UK/EU service book; explicitly not the Australian interval. all variants
Under 'After Maintenance and Repair', MG's own maintenance schedule lists, for both the Type A and the Type B service, checking the software version of the electronic control units and upgrading to the latest version if one is available - alongside resetting the maintenance interval indicator, reading and clearing fault codes and checking the control systems' status. In other words the manufacturer treats a software check as routine maintenance work, not as something only done when a fault is reported. That is a concrete thing to put in front of a service adviser who says updates are only applied against a complaint. Ask at booking for the software check to be carried out and for the before and after versions to be written on the invoice.
2023UK/EUStandard maintenance item in the UK/EU service book; the Australian schedule is published separately. all variants
Separately from the A and B inspections, MG lists three special maintenance items with their own intervals: the electric drive transmission fluid is replaced every 96,000 km, brake fluid every two years, and coolant every four years or 96,000 km (60,000 miles), whichever comes first. Levels of the transmission fluid, brake fluid, coolant and washer fluid are checked at every service. This is the reason one visit in the cycle costs a good deal more than the ones either side of it - the step up is fluid, not labour - and it gives you something concrete to check a quote against.
2023UK/EUFluid replacement intervals from the UK/EU service book; verify against the Australian schedule for a local car. all variants
MG's special maintenance instructions say that if the car is driven in dusty or sandy areas the air conditioning filter element should be checked every 5,000 km and replaced as needed. That is many times more frequent than the scheduled replacement, which appears against only one of the two inspection types and so comes round every other service. Anyone on unsealed roads, or parking under trees, or driving through a dry summer, should treat the filter as a consumable to look at rather than something the dealer handles on its own timetable - it is cheap, and a clogged filter shows up as weak airflow and a stale-smelling cabin.
2023UK/EUCabin/AC filter servicing guidance from the UK/EU service book; the dusty-conditions instruction is usage-based rather than market-based. all variants
Both service types include a run of high-voltage checks done from underneath: the battery pack housing and its bracket examined for cracks, damage or deformation; the pack's vent valve checked for damage and for whether its installation mark shows it has shifted; the paint marks on the pack mounting bolts checked so a loosened bolt is visible; the pack earth strap checked and replaced if needed; the cooling water pipe clips checked for a reliable seal; plus the high and low voltage harnesses and connectors checked for chafing, interference or damage, and the manual service disconnect switch checked for condition and security. If you have grounded the car, hit road debris or driven through deep water, this is the inspection to ask for by name - and it means the car genuinely has to go on a ramp.
2023UK/EUHigh-voltage inspection items in the UK/EU scheduled service; describes the car's HV hardware so it should read across markets. all variants
The service record pages carry a blunt line that the record is important and could affect your warranty entitlement, so make sure the correct page is stamped and signed at the end of every visit. Just as useful is the phrasing MG uses throughout the book: it repeatedly refers to an MG Authorised Repairer or a suitably equipped service centre, which is the manufacturer's own document acknowledging that the car can be serviced somewhere other than a franchised dealer. When the last service record entry is used, MG expects you to order a replacement book and copy the vehicle details across so the history stays continuous.
2023UK/EUService record and repairer wording from the UK/EU service book; warranty consequences are market-specific. all variants
MG Assistance is not a policy you buy - it is bundled into the vehicle warranty, so the registered keeper pays nothing for it and cannot cancel it, and if you sell the car the remaining benefit passes to the next registered keeper. The product summary sets the term as 12 months from the date the car was first registered with the DVLA. Cover is 24/7 for a breakdown at home or at the roadside, an accident or vandalism, and includes finding and diagnosing the fault, an attempted repair on the spot, recovery to any single UK destination of your choice, and then either 48 consecutive hours of a replacement vehicle, public transport costs, or overnight accommodation.
Oct 2018UK/EUUK-only breakdown cover summary; does not describe Australian roadside assistance. all variants
The exclusions are worth reading before you need them. MG Assistance does not cover faults arising from a lack of routine maintenance, and one of the keeper's stated obligations is to complete repairs promptly following a service notification or a previous patrol visit - so a missed service or an ignored warning is a documented reason to refuse a callout. The driver must be with the vehicle both at the point of breakdown and when the patrol arrives, which rules out leaving a car somewhere and meeting the truck later. The car must also be roadworthy, within 3.5 tonnes and no wider than 2.3 m, no more passengers will be recovered than the vehicle legally seats (up to seven), livestock are not carried, and any excess your motor insurer charges after an accident is yours to pay.
Oct 2018UK/EUExclusions and obligations from the UK MG Assistance product summary; UK-specific. all variants
The UK warranty statement sets the clock running from the date of first registration and splits the cover in two: unlimited mileage for the first 12 months, then a hard 80,000 mile ceiling for months 13 to 84, whichever comes first. It transfers to each new owner while it still has time and mileage left, which is what makes a used MG4 worth checking the registration date on. Two smaller points sit in the same document: a part replaced under warranty is only covered for whatever is left of the original period, not a fresh term of its own, while a genuine MG part bought and fitted separately carries its own 12 months unlimited mileage.
Oct 2021UK/EUUK/EU warranty structure; the mileage cap is a UK term and does not describe an Australian MG4. all variants
MG names this as a standing condition rather than a general exclusion: if the high-voltage battery has been opened or removed from the car by anyone other than an MG Authorised New Energy Repairer, claims will not be accepted. That matters for the growing trade in independent EV battery work and module-level repair, and for anyone tempted to let a general workshop investigate a pack fault. Independents can legally access MG's repair information, but the battery is the one area where letting the wrong workshop inside costs you the cover. If an independent is doing your servicing, keep HV pack work separate and with an authorised New Energy site while the warranty still runs.
Oct 2021UK/EUWarranty condition on who may open the HV battery; UK statement, likely mirrored elsewhere. all variants
Two conditions in the warranty statement decide whether the back half of the warranty survives. First, every main service must be carried out within 1,000 miles (1,609 km) or 28 days of the recommended interval or service anniversary, and the service record must be stamped and endorsed. Second, the fourth to seventh years of cover are conditional on a full and accurate service history in line with MG's schedule, using genuine parts and fluids to the correct specification. Independent servicing does not by itself invalidate the warranty, but MG says faults resulting from work done by a non-authorised repairer may not be covered - so the safest position for an independent-serviced car is genuine parts, correct fluid specs, and receipts kept. The statement also warns that continuing to drive with a known fault can invalidate cover, which is a good reason to get every complaint logged on a job card even when the dealer says it is normal.
Oct 2021UK/EUUK warranty conditions on service timing, history and independent servicing. all variants
The warranty statement says exploratory dismantling charges are only reimbursed as part of a valid claim, and that it is the warranty holder's responsibility to authorise and pay those charges if the failure proves not to be MG's. That is the written basis for something owners find outrageous - being asked to approve or pre-pay a diagnostic fee on a car that is still in warranty. It is not a dealer inventing a charge; it is how the policy is written. The practical defence is to ask, before you sign the authority, what the charge will be, what would make it a valid claim, and to have the symptom and any relevant bulletin or service action recorded on the job card first, because a fault that maps to a known campaign is far less likely to end up billed to you.
Oct 2021UK/EUWho pays for warranty investigation work; UK warranty statement. all variants
There is a separate warranty policy for cars used for private hire or taxi work: three years or 60,000 miles for electric and hybrid vehicles, and that reduction explicitly includes the high-voltage powertrain components and the lithium-ion battery. To be eligible at all the car has to be registered as a private hire or taxi vehicle with MG by an MG dealer, and MG says failure to do that may void the warranty entirely. Anyone buying an MG4 to do rideshare or private hire needs to declare it up front rather than after a problem appears, and anyone buying used should ask whether a high-mileage example has been registered that way, because it changes what cover is left.
Oct 2021UK/EUReduced warranty for taxi and private hire use, including the HV battery; UK statement. all variants
The very first line of the official MG4 EV maintenance check sheet, before any physical job, is to check for outstanding service actions on the car. The sheet then requires the technician to connect the diagnostic equipment and read, log and clear all stored fault codes as part of the service. Together those two lines are the most useful thing an owner can quote at a service booking: MG's own procedure obliges the dealer to check whether your VIN has any campaign, bulletin or software action waiting, and to pull the codes out of the car. Ask for both in writing - what service actions were found and whether they were carried out, and what codes were logged before they were cleared. Codes are wiped as part of the job, so if you do not ask for the log you lose the record of any intermittent fault the car has quietly been storing.
2023UK/EUMandatory pre-service checks in MG's official MG4 maintenance check sheet; UK/EU document. all variants
MG's maintenance sheet puts the actual replacement items on fixed multi-year cycles rather than on every service. At two years or 48,000 km: brake fluid, the air intake pollen (cabin) filter, and the key remote handset battery - the last also whenever the instrument pack tells you. At four years or 96,000 km: the high-voltage battery system coolant and the motor/PEB coolant, plus the drive transmission fluid, with coolant strength measured and recorded after the change. That pattern explains why EV servicing looks cheap for a couple of visits and then jumps - the expensive service is the one where the coolants and the gearbox oil are done, not one where anything has worn out. Budget for the four-year visit and treat a quote that skips those items at that point as incomplete.
2023UK/EUFluid and filter replacement intervals from MG's MG4 check sheet; UK/EU document. all variants
One of the after-every-service items on the MG4 check sheet is to connect the vehicle to an HV charge point and confirm the charging system is fully functional. It is easy to miss on an invoice and it is worth insisting on, because charge-flap and charging faults are exactly the kind of intermittent problem that owners discover at a public charger at night rather than in a workshop. The same sheet also has the technician check the HV harness and connections both in the engine bay and on the lift, and inspect the HV battery ground cable. If you have had any charging oddity - a flap that will not open, a session that fails to start, a cable that will not release - say so at booking so it is tested against a live charger while the car is in.
2023UK/EUCharging system functional test is a required service item; UK/EU MG4 check sheet. all variants
Step 5 of the PDI has the technician plug the car into MG's diagnostic system, put the vehicle into normal mode, clear all stored fault codes, and then compare the software and calibration level of every control module against what MG's central manufacturer database says the car should be running. Any mismatch has to be recorded and referred to MG Technical Support to establish whether an update is essential. This is a manufacturer instruction, not a courtesy: a car handed over still on factory-shipped software with a recorded mismatch means the PDI was not completed properly. It also gives you the exact phrase to use with a dealer, because 'check the ECU matching status against the manufacturer database' is their own wording, not yours.
2022UK/EUUK PDI requirement to verify module software against MG's database before handover. all variants
Both MG4 maintenance check sheets carry the same pair of line items: connect the diagnostic system and read, log and clear all fault codes, then check and record the high-voltage battery's state of charge and state of health, with a printed percentage box on the sheet for each. The number owners chase with third-party Bluetooth dongles is therefore one that MG's own technician is instructed to capture on every visit. Ask for it, ask for it written on the invoice, and over the years you build a dated degradation record - much stronger evidence for a battery warranty claim than a range readout, and far more useful than guessing from full-charge kilometres.
2022UK/EUUK maintenance check sheet requirement to record HV battery SOC and SOH at every service.
At the bottom of both MG4 maintenance check sheets, under the heading 'at every service', is a requirement to carry out an annual corrosion and cosmetic inspection using a dedicated corrosion inspection sheet, and to update the service portfolio to confirm it was done. This is the check that underpins the anti-perforation and paint side of the warranty, and it is the easiest one to skip quietly because it generates no parts and no visible work. If you ever need to claim for corrosion or paint, an unbroken run of completed and stamped corrosion inspections is what makes the claim straightforward - so check the sheet exists in your service pack rather than assuming it does.
2022UK/EUUK service requirement for an annual corrosion/cosmetic inspection on a separate sheet. all variants
MG's UK maintenance check sheet sets out an alternating pattern: an 'A' service at the first year or 15,000 miles and then at years three, five and seven (45,000, 75,000 and 105,000 miles), and a heavier 'B' service at years two, four and six (30,000, 60,000 and 90,000 miles), whichever falls first in each case. There is a separate low-mileage sheet for cars covering under about 10,000 miles a year, which brings the visit forward to every 12 months or 10,000 miles and alternates A and B annually. The practical point is that the expensive items sit on the B visits and on fixed calendar clocks, so the cost of ownership is lumpy rather than evenly spread - and a low-mileage car is not exempt.
2022UK/EUUK/EU service interval structure - explicitly does not describe the Australian schedule. all variants
Both MG4 check sheets put brake fluid replacement on a strict two-year clock, or 30,000 miles, whichever comes first, and both flag it as a chargeable extra rather than part of the standard service content. An EV uses its friction brakes so lightly that it is easy to assume the fluid does not matter, but brake fluid absorbs moisture with time rather than with use, so a garage-queen MG4 needs it exactly as often as a hard-worked one. Expect it on the bill at every second visit, and check whether a capped-price or prepaid plan actually includes it, because MG's own paperwork treats it as an extra.
2022UK/EUUK service item and cost treatment for brake fluid; interval is calendar-driven. all variants
The MG4 has separate cooling circuits for the traction battery and for the motor and power electronics, and MG schedules a full replacement of both coolants at five years or 75,000 miles, whichever comes first, with the technician required to measure and record the coolant strength both before and after the change. Coolant strength is measured and written down at every service in between. This catches out owners who bought an EV expecting no fluids at all: it is a real, non-trivial job, it arrives on a specific visit, and it is worth budgeting for the five-year service in particular rather than being surprised by it.
2022UK/EUUK service interval for HV battery and motor/power-electronics coolant replacement. all variants
The MG4's single-speed reduction gearbox is not sealed for life. Its oil level is checked and topped up at every service, and the standard maintenance sheet calls for a full fluid replacement at four years or 60,000 miles, whichever comes first. The low-mileage sheet keeps the same 60,000-mile cap but stretches the calendar side to six years. Two reasons to care: it is another cost that lands on one particular visit, and the routine level check is the point at which a slow gearbox oil leak - a fault UK owners reported before MG produced a breather modification - ought to be picked up before it becomes a problem.
2022UK/EUUK service intervals for reduction gearbox oil; two official sheets conflict on the calendar interval. all variants
The PDI is not just a glance at the lights. The technician is required to position proper beam-setting equipment in front of the car, switch on the dipped headlamps and set the aim to 1.0 percent vertical and 0.0 percent horizontal, adjusting if it is out. Cars do come off a transporter with the aim wrong, and that is a common cause both of dazzling oncoming drivers and of an owner concluding the headlights are poor when they are simply pointed at the wrong place. If your MG4's beams look low, high or skewed, this is a documented target figure you can ask a dealer to reset to, rather than a matter of opinion. It is separate from the dashboard levelling dial, which only trims the aim for load.
2022UK/EUUK PDI headlamp alignment specification; RHD beam pattern. all variants
Bulletin SI-TB2023071101 sets an update rule that explains a lot of half-finished dealer visits. Seven modules - the gateway, the battery management system, the charging control unit, the charge port controller, the suspension/chassis control unit and the two motor power control units - are version-locked together. If a workshop updates or replaces any one of them for any reason, it must read the software level of the other six and bring anything older up to at least the listed level. MG also gives an order of operations, and a later revision of the bulletin adds a specific trap: after updating the charging control unit, the charge port controller can stop responding, and the way to wake it is to plug a charger into the socket, after which its version can be read and updated. Battery management software is specific to your battery size, with different versions for the 51, 64 and 77 kWh cars. If a module has been changed on your car, ask for written confirmation that all seven were checked.
Aug 2023UK/EUMG Motor Europe bulletin, applicable to one identified build variant of the MG4; version levels are European. all variants
MG splits cooling into two independent circuits, each with its own pump and its own expansion tank — which is why there are two coolant reservoirs with MIN and MAX marks under the bonnet, and why topping up the wrong one achieves nothing. The drive system circuit (motor, motor control module and the combined charging unit) holds 5.6 litres, and the high-voltage battery circuit (chiller, pack heater where fitted, and the pack itself) holds 4.0 litres, both OAT glycol coolant. MG states coolant should be replaced regularly to keep its properties, and warns that water quality matters because hard or ion-rich water causes scaling and corrosion in the system. Other fluids MG specifies are DOT 4 brake fluid (0.8 litres) and 0.75 litres of Shell E-Fluids E6 iX in the reduction gearbox. Useful when a service quote steps up at a fluids-heavy visit: a coolant service on this car means two systems, not one, and there is gearbox oil in the picture as well.
2023GeneralFluid grades and capacities from MG's UK/EU training material; capacities are a vehicle characteristic, service intervals are market-specific. all variants
Almost every fault tree in this section of the manual ends the same way. Once the switch, the wiring and the lamp or motor have been ruled out, the instruction is to reflash the body control module's software and re-test, and only replace the module if the fault is still there. That is a software step, not a parts step, and it sits between you and an expensive control-module replacement on faults as varied as a dead headlight, a dead window, a door that will not unlock and a charge flap that will not open. If a quote lands on your desk for a new body control module, it is fair to ask whether the reflash was carried out first and what the result was.
May 2022GeneralFinal step of nearly every lighting and door fault tree in MG's MG4 diagnosis manual; UK/EU-published.
There is no bulb-change step anywhere in MG's diagnosis for the low beam, the high beam, the front position lamp, the daytime running lamp or the front indicator. In each case the test is to take the complete headlamp assembly off the car, fit a known-good one and see whether the fault goes away, and the fix if it does is that assembly. The headlamp levelling motor is inside the same unit, so a headlight that will not adjust is treated the same way. Budget accordingly: a single dead lighting function at the front is a unit replacement, not a consumable. The only place in this whole section where MG mentions a bulb and a filament at all is the number plate lamp, which suggests that is the one old-fashioned bulb left on the car.
May 2022GeneralMG's own remedy step for every front lighting function on the MG4; UK/EU-published manual, but the lamp architecture is not a market variable.
Repeatedly through the interior sections, once MG has eliminated fuses, relays and wiring, the instruction is not to replace the failed component but to replace what it calls the upper level assembly - the larger unit the part is built into. That is spelled out for the seat adjustment motor and again for the seat cushion heating element, and the same wording appears for the interior reading lamps. For owners this is a cost warning: on this car a failed seat motor or a dead heating element in the cushion is not treated as a small part swap in MG's own documentation, and the quote will reflect the assembly rather than the component.
May 2022UK/EUMG4 EV Guided Fault Finding, Interior Fittings and Interior Lighting (p93-94, p108-109) - UK/EU document all variants
Across the whole lighting section - low beam, high beam, position lamps, daytime running lamps, hazards, reversing lamps, interior and boot lamps - the final two steps are always the same. Reflash the body control module, and if the light then works, the diagnosis is finished; only if it still does not work is the module replaced. MG is documenting that a light which does not come on, or one that will not switch off, can be a software problem in the body computer rather than a failed lamp or a broken wire. The same pattern appears for the wipers and washers. For an owner this is a real lever: a reflash is a dealer tool operation and much cheaper than a new module, and MG's own procedure requires it to be tried first.
May 2022UK/EUMG4 EV Guided Fault Finding, Lighting System and Exterior Fittings, final step of most procedures (p98-133) - UK/EU document all variants
Every symptom table in MG's own diagnosis manual opens with the same instruction: use this table when a fault has occurred, the control module has NOT stored a diagnostic trouble code, and the cause cannot be seen by eye. In other words, MG's own documentation assumes a large class of real MG4 faults that a scan tool will not name, and it lays out the expected causes and the order to work through them. That matters if you have ever been told your car is fine because nothing showed up on the tester. It is not fine, and MG's own material tells the technician what to do next. The tables cover complaints owners actually make - the aircon smells, the heater is weak, the car will not charge from the wall, the plug is stuck in the car, something judders when you brake - and each one names the parts MG expects to be at fault and the sequence to check them.
May 2022UK/EUApplies to how MG documents MG4 diagnosis; the copy read is a UK/EU repair-information release. all variants
Buried in MG's aircon leak-detection page is a warning worth carrying to any independent workshop: use only fluorescent dyes approved by SAIC, because not all dyes are compatible with the compressor oil - some thin the oil out or react with it chemically. MG also says not to overcharge the system with dye, because too much of it degrades the cooling performance. This matters because the glowing-dye leak test is the cheap, standard trick at any aircon shop, and the generic dye in the bottle on the shelf is not necessarily the right one for an electric car's compressor. The MG4's compressor is electrically driven and runs on a specific oil, so oil contamination is not a trivial matter. Before you agree to a dye test, it is entirely reasonable to ask what dye is going in.
May 2022GeneralMG4 air conditioning service caution; source is a UK/EU repair-information release. all variants
A pattern runs right through MG's diagnostic procedures: once a small component is identified as the failure, the instruction is not to replace that component but to replace the next assembly up. A failed seat heating element means replacing the seat cushion assembly it is built into; a failed seat adjustment motor means replacing the assembly above it; interior lamps are replaced as complete units. For an owner this explains why a quote for something that sounds trivial can come back at hundreds of dollars, and it is a fair question to ask the workshop whether the part can be supplied separately or whether MG only lists the larger assembly. It also makes independent repairers worth a call, since they are not bound to MG's parts strategy in the way a franchised dealer is.
May 2022UK/EUMG4 Electric first generation; UK/EU service documentation - Australian parts supply and dealer practice may differ all variants
For almost every electrical complaint in this section - interior reading lamps, the vanity mirror lamp, the boot lamp, the wipers, the washers - MG's final diagnostic step is the same: reflash the body control module's software, confirm whether the function now works, and only replace the module if it still does not. That is worth knowing as an owner, because it means a proportion of small electrical faults on this car are software problems in a module rather than broken parts, and the fix costs labour rather than a control unit. If you are quoted for a replacement body control module, it is entirely reasonable to ask whether the reflash step was carried out first and what the result was.
May 2022UK/EUMG4 Electric first generation; UK/EU service documentation - Australian dealer practice and tool access may differ all variants
Before anything is measured, MG's diagnostic strategy has the technician establish what normal operation of the system looks like, then compare your car against other examples of the same model in normal working order. The manual states plainly that the condition you describe may be a normal condition, and instructs the technician to explain the check results and how the system works back to you. Later, in the vibration section, MG goes further: if the symptom has been reproduced and the car matches known-good cars of the same model, year and configuration, the technician is to treat it as a potential operating characteristic of the vehicle and check the service bulletins to see whether MG has since decided otherwise. This is the documented route by which a real, repeatable complaint ends up written up as no fault found. It also tells you what actually shifts that outcome: not arguing, but a service bulletin, or a comparison against another MG4 that genuinely behaves differently.
2022UK/EUMG4 EV first-generation guided fault finding; UK/EU RMI document, process may differ at Australian dealers all variants
The manual opens the diagnostic system check with a list of conditions that must all hold before any of its procedures are valid: the 12V battery fully charged with clean, secure cabling, no blown fuses, clean and correctly positioned earth points in the area of the complaint, all connectors on the suspect circuit properly seated, and explicitly no after-sale add-on equipment affecting the system's operation. In practice that means a car with a tired 12V battery, or with a dashcam, aftermarket camera, amplifier or lighting spliced into the harness, does not meet MG's own preconditions for diagnosis. Two things follow for owners. First, sorting a weak 12V battery before the visit can be the difference between a diagnosis and a wasted day. Second, be upfront about everything that has been added to the car, because MG's process expects the technician to account for it, and hiding it is the fastest way to a bill for time spent chasing your own accessory.
2022UK/EUMG4 EV first-generation; UK/EU RMI document describing MG's workshop preconditions all variants
MG's diagnostic categories separate a fault code that is present now from one that is only in the car's history, and the manual states that where the symptom is not occurring but the history shows it has occurred, this is an intermittent fault - a real diagnostic category with its own procedure, not a dead end. The car also records freeze frame data, a snapshot of the conditions that were present at the moment a code was set, which MG expects the technician to use both to diagnose the fault and afterwards to recreate the exact conditions and prove the repair worked. That gives owners a much better question than asking whether any faults were found. Ask whether there were any stored or history fault codes, not just current ones, and whether the freeze frame data was read. A car that reports nothing wrong today may still be carrying the evidence of what went wrong last week.
2022GeneralMG4 EV first-generation; how the car's diagnostic memory works, not market specific all variants
The manual states that control modules need reprogramming only in three situations - a new module fitted during repair, a module transferred from another vehicle, or an upgraded software or calibration file having been issued for that vehicle. Separately, the technician is told to check that the module carries the correct calibration or configuration file, and to reprogram it with the latest software if the programming is found to be wrong. Read together, that is the manufacturer's own answer to why a dealer will not simply flash your car on request: unless MG has released something for your vehicle, the process does not call for it. It also gives you the right question. Rather than asking for an update, ask whether the car's module software has been checked against MG's database and whether anything has been issued for your VIN - which is a check the process supports.
2022UK/EUMG4 EV first-generation; UK/EU RMI process, Australian software releases differ all variants
There is a long passage on why electrical gremlins come and go, and almost none of it points at expensive parts. MG describes fretting: vibration and temperature swings cause movements of a fraction of a hair's width between the two halves of a connector, oxide debris builds up, and resistance rises until the circuit misbehaves. The documented remedy is to unplug the suspect connector, apply insulating grease to both sides of the terminals, reconnect and wipe off the excess. Alongside that it lists broken wires inside intact insulation, terminals crimped onto insulation rather than wire, moisture entering through pierced insulation and corroding a conductor invisibly, and deformed female terminals from repeated unplugging. It also instructs the technician to test the contact of the terminals before replacing a suspect component. If you are quoted a new module for a fault that comes and goes, this is manufacturer documentation that a connector should be eliminated first.
2022GeneralMG4 EV first-generation; general electrical fault principle, not market specific all variants
The high voltage precautions name the components that untrained staff are forbidden to dismantle, and the list is broader than owners expect: the battery pack and drive motor, the power electronics, the high voltage harness, the electric air conditioning compressor, the onboard charger, the charging port and the AC charging cable. Work requires documented high-voltage training, insulating gloves and boots to a national standard, and a multimeter check that the circuit is genuinely dead before anything is touched. After the manual service disconnect is pulled, a five minute wait is required before checking for residual voltage, and the car must stand for at least three minutes with the 12V and redundant 12V batteries disconnected beforehand. The practical consequence is that a damaged charge port or charging cable is not a general workshop job on this car, and a repair done outside that framework is both a safety question and a warranty one.
2022GeneralMG4 EV first-generation; high-voltage system scope, licensing wording is source-market specific all variants
The contents pages of this volume are effectively MG's list of complaints it expects to receive about the MG4, each with its own published procedure and page number. Among them: a charging connector that cannot be unplugged, a charging connector that will not go in, air conditioning peculiar smell, vehicle off-track, a vehicle that cannot keep straight, abnormal wear in tyres, brake judder, a front wiper that fails to return to its parked position, display error or no display, Bluetooth connection failure, rear view camera not displaying, keyless entry coverage abnormal, and no warning given for an obstacle when parking. If a dealer tells you one of these is normal or unheard of, MG's own documentation says otherwise.
2022UK/EUMG's published symptom index for the MG4 EV; use its wording when describing a fault to a dealer all variants
The manual opens its service and replacement instructions by telling technicians that only components MG recommends may be used, and then says plainly that using anything else makes the warranty invalid. The same short paragraph warns that non-recommended parts can compromise both vehicle safety and the car's anti-corrosion protection, and adds that MG dealers are only supposed to supply MG-recommended components in the first place. This sits awkwardly beside the reassurance owners are usually given that an MG can be serviced anywhere: where the work is done and what goes into the car are two separate questions, and this sentence is what a dealer will point at if a claim is later declined. It is worth knowing before you accept a cheap non-genuine part on anything structural, braking, suspension or corrosion-related, and worth keeping the receipt and specification for anything aftermarket that does go on.
Jul 2023UK/EUMG's stated warranty position on non-genuine parts; UK/EU manual wording all variants
The corrosion inspection that has to be recorded to keep the anti-perforation warranty alive turns out to be a modest thing. MG's instruction is a two-stage look: raise the car and inspect the underbody sealer, sills, wheel arches and the areas around suspension mounting points with a lamp, then lower it and look over the visible paintwork, with particular attention to the leading edge of the bonnet, the flanges in the front compartment and the lower body and doors. The manual states this is a visual check only and that the technician is not required to remove trim panels or sound-deadening material. It also says the car must be washed first if it is dirty. Two things follow for an owner: turning up with a filthy car undermines the inspection you are paying for, and corrosion hidden behind trim, glass surrounds or seats will not be found at this stage - MG notes those cases need the parts removed and replaced to repair properly.
Jul 2023UK/EUDealer inspection procedure as written in a UK/EU manual all variants
Fitting a new airbag control module to an MG4 is not the end of the job. MG documents three distinct operations - loading the software, configuring it to your particular car, and then a separate 'activation' that turns on airbag deployment and the event data recorder. In other words, a freshly fitted module sits there inert until someone deliberately activates it, so a car that has had crash repairs done cheaply or hurriedly could in principle drive around with airbags that will not fire. It is also the clearest confirmation in MG's own documentation that the MG4 carries an EDR that logs what the car was doing in a collision, and that this recording function is tied to the airbag module rather than being a separate black box.
Jul 2023GeneralApplies to any MG4 that has had its airbag control module (SDM) replaced, typically after a collision
The front camera behind the windscreen and the radars all relearn their aim by being driven, not by being pointed at a target board. MG specifies a sustained run on a long straight road, held between 40 and 60 km/h, and the two systems want different roads: the camera needs clearly visible lane lines down both sides, while the radars need evenly spaced roadside objects such as power poles to lock onto. How long it takes depends on the road and how much there is to see. This explains a lot about why a windscreen replacement, a wheel alignment or a bumper repair can take longer than expected, why a workshop in a dense urban area may struggle to complete it at all, and why a car can come back from a repair with the driver assistance systems behaving oddly - the parts were fitted, but the drive was never done properly.
Jul 2023GeneralFront camera and radar calibration after windscreen, radar, bumper or alignment work all variants
On the MG4 the heater fan and the little resistor pack that sets its speeds both live inside the air inlet box in the front compartment, and MG's own removal sequence for that box starts by draining the coolant and recovering the refrigerant before anything is unbolted. On most cars a noisy blower or a fan that only works on full speed is a cheap job reached from under the dashboard. Here it is a front-end strip with a regas at the end of it, so expect a quote several times what you would pay on a conventional hatchback. The good news buried in the same pages is that the speed-regulating resistor is a separate, individually replaceable part rather than being built into the fan, so a fan that runs only on the highest setting does not need a whole new blower.
Jul 2023GeneralMG4 EV, July 2023 workshop manual, A/C air inlet box and blower (manual p264-p268) all variants
The MG4's compressor is driven electrically off the traction battery, not by a belt, and MG's procedure for removing it begins with pulling the manual service disconnect that isolates the high-voltage pack and includes unplugging a high-voltage harness connector from the compressor itself. That puts a failed compressor firmly in high-voltage-qualified territory: the independent air-conditioning specialist who would happily regas the car cannot legally or safely do the compressor unless they hold electric-vehicle qualifications and the right isolation equipment. Routine work that only involves the refrigerant circuit away from the compressor is a different matter, but anyone quoting to change the compressor should be able to tell you how they isolate the pack.
Jul 2023GeneralMG4 EV, July 2023 workshop manual, A/C compressor assembly (manual p237) all variants
Buried in the airbag chapter is a warning most owners never see: once the windscreen has been replaced, the car should not be driven for a full 24 hours. The reason is that the passenger airbag inflates upward and braces against the inside of the glass, so the bonding adhesive has to be fully cured before the screen can do that job. A mobile fitter who replaces your screen in a supermarket car park and hands the keys straight back is not following the manufacturer's own instruction. Combine this with the separate requirement to recalibrate the forward-facing camera afterwards and a windscreen job on an MG4 is a two-step, next-day affair rather than a one-hour visit.
Jul 2023GeneralAll MG4 variants with a front passenger airbag; UK/EU workshop manual wording, but the physical constraint applies anywhere
The service manual's air conditioning specification page gives the refrigerant as R-1234yf with a charge of 580 grams give or take 20, and the compressor oil as 150 grams of POE/HS1. That matters to owners for two reasons. R-1234yf is several times the price of the older R134a gas and needs different recovery equipment, so a re-gas is dearer and not every small workshop can do it - check before you book. And if a component such as the condenser, evaporator or a pipe is replaced, MG specifies a set amount of oil to be added back with it, so a repair that only puts gas back in has been done short.
Jul 2023UK/EUMG4 EV, first-generation; from the UK/EU July 2023 service repair manual, so the refrigerant type may be market-specific all variants
Three of the MG4's most expensive charging-side parts are explicitly not plug-and-play. The manual ends the battery pack refit by requiring the battery management system to be programmed and coded, and says the pack is only fitted to the car after that succeeds. The combined charging unit (the box that handles AC charging and also feeds the 12V system) and the electric vehicle communication controller each get the same instruction. There is also a step before the pack's own electronics module comes out: the diagnostic tool is connected first to back up the parameters held in the battery management system. The practical consequence for an owner is that a second-hand or salvage part cannot simply be bolted in - it needs MG's tool and the right file - and that if charging misbehaves after a big repair, an omitted coding step is a fair thing to ask about.
Jul 2023GeneralMG4 EV, first-generation; applies to HV battery pack, combined charging unit and EV communication controller replacement all variants
The manual sets out what a facility must have before the pack can even be opened: a controlled indoor area of about one car in size, protected from rain and snow, kept dry and ventilated, screened off from metal dust, powder and oil, with warning signs and restricted access. The pack's upper cover is held on by 80 bolts and four suspension nuts. An insulation test at 500 volts must be done before and after any work, reading at least 550 megohms, and the pack then has to pass a sealed dry-chamber pressure test and a separate coolant-circuit pressure test before it goes back under the car. That is why pack-internal repair is a specialist job with a small number of approved sites rather than something your usual garage takes on, and it is also a reasonable list of results to ask for if your car's pack has ever been opened.
Jul 2023GeneralMG4 EV, first-generation, HV battery pack internal repair all variants
MG's own workshop manual treats the restraint system as time-expiring hardware rather than fit-and-forget. It states that the propellant inside airbag modules and seat belt pre-tensioners deteriorates with age, and that the airbag modules, the seat belt pre-tensioners and the rotary coupler (the clockspring behind the steering wheel) are to be replaced every ten years. Nothing in MG's published service schedule prices this in and no dealer is likely to raise it, but it is worth knowing if you plan to keep an early MG4 into the 2030s, and worth asking about on any car approaching that age.
Jul 2023UK/EUFirst-generation MG4; stated in MG's UK/EU service repair manual all variants
There is no engine to circulate coolant in this car, so both loops are sealed circuits moved by electric pumps. MG's refill procedure therefore ends with the technician plugging in the scan tool, running a dedicated bleed routine for whichever circuit was opened, and keeping the coolant flowing for twenty to thirty minutes while topping up until the level in the expansion tank stops falling. The practical consequence for an owner is that the scheduled coolant replacement needs a workshop with MG's diagnostic software; a garage that simply tips coolant into the tank and screws the cap back on will leave air in the system.
Jul 2023GeneralFirst-generation MG4; applies to both the drive-system and battery coolant circuits all variants
Useful facts to hand an independent workshop. The brakes take DOT-4 fluid and hold 0.8 litres. The coolant is an organic-acid (OAT) ethylene glycol type, and MG warns against topping up with a different formulation or adding aftermarket corrosion inhibitors, because the wrong chemistry can damage the drive system and the high-voltage battery pack. The reduction gearbox takes one specified oil and MG states bluntly that using anything else can seriously damage the transmission. In a genuine emergency a small amount of clean water may be added to the coolant tank, accepting weakened frost and corrosion protection until it is put right. The washer bottle holds only 2.5 litres, which is why it empties faster than owners expect.
Jul 2023GeneralFirst-generation MG4, all variants
Tucked into the drain-and-refill procedure for the larger rear drive unit is a single caution: replace the electric drive unit fluid when the vehicle has been soaked in water. It is easy to miss and it matters. The reduction gearbox breathes through a vent plug and is sealed only well enough for normal road use, so a car that has been driven through deep floodwater, or has stood in it, can take water past the vent or the shaft seals into the oil. Water in a splash-lubricated gearbox attacks the bearings and gear faces over time rather than immediately, which is exactly why it gets skipped. For anyone buying used this is a concrete question to ask: if the car has any flood history at all, was the drive unit oil changed, and is it on the service record. For an owner who has driven through water deeper than they meant to, it is a cheap piece of insurance against a much larger bill later.
Jul 2023GeneralDrive unit lubrication after water immersion; applies to any MG4 with flood or deep-water exposure. all variants
This section quietly answers a question owners of leaking cars have been asking. MG publishes a full internal rebuild of the reduction gearbox: differential oil seals replaced on their own, input, intermediate and differential bearings pressed out and back in, circlips and adjustment shims measured and selected to hundredths of a millimetre, sealant applied to the housing joint, and a pressure test of both the dry cavity and the coolant circuit before the unit goes back in. So on paper a gearbox that is weeping oil is a seal-and-gasket repair, not automatically a new drive unit - useful leverage if you are quoted a complete assembly. The motor is the opposite case. MG states plainly that the rotor is strongly magnetic and that nothing beyond the high- and low-voltage cover plates may be dismantled, so the motor is a sealed item that gets replaced rather than repaired. That split is worth knowing before you accept any quote: the geared half of the drive unit is serviceable, the electrical half is not.
Jul 2023GeneralDrive unit repairability; relevant to the known MG4 reduction gearbox oil leak. all variants
MG specifies a single lubricant for the reduction gearbox across the range - a Shell electric-driveline fluid - so if a workshop is putting in something generic, that is a fair thing to query. The quantity is not a single number, though. The rear unit in the 51 and 64 kWh cars takes about 0.7 litres on a routine drain and refill and 0.8 litres from dry. The larger rear unit used in the 77 kWh car and the four-wheel-drive car takes about 0.75 litres routine and 0.9 from dry. The front unit fitted to the all-wheel-drive car is the thirstiest at roughly 1.05 litres routine and 1.1 from dry, and of course an all-wheel-drive car has two boxes to fill. MG also distinguishes the two fills deliberately: a box that has simply been drained keeps some oil behind on its internals, so it takes less than one that has been stripped and rebuilt. If you are being quoted for a gearbox oil change, that is why the same job costs differently on different MG4s.
Jul 2023GeneralReduction gearbox lubrication across all three MG4 drive unit types.
MG's headlamp removal procedure begins by removing the front bumper, and only then do the five retaining bolts come out - they are spread across the front-end module, the wing, the bumper side bracket and the bumper beam. That is why a headlamp quote is never just the price of the lamp. Because every function in the unit is an LED and MG replaces the assembly rather than the individual lamp, one failed function is a whole-headlamp job. The one exception in the front lighting is the direction indicator: the bumper-mounted front indicator lamp is a separate four-screw part, and MG also documents a twist-out bulb holder for a front indicator bulb inside the headlamp, even though its own description elsewhere calls that indicator an LED.
Jul 2023GeneralFront lighting, first-generation MG4; two headlamp configurations exist. all variants
MG's own fault-code list runs to 1,171 codes across 23 modules, and 222 of the entries are some version of 'lost communication with' another module, plus another 42 for the network dropping out entirely. Those codes do not mean the module that reported them is broken. They mean it could not hear something it expects to hear. One flat 12V battery, one disturbed connector, or one genuinely dead module will light up ten or twenty of them at once right across the car. If a workshop reads the car, hands you a list of fifteen faults and quotes accordingly, the right question is which one of them is the cause and which fourteen are just the rest of the car noticing. MG's own manual is organised the same way, with a whole separate procedure for checking the integrity of each network before chasing any individual code.
Aug 2023GeneralAll first-generation MG4. Counted from MG's own fault-code index for the 23 modules it documents.
MG4 codes come with a two-character suffix that MG calls the failure type byte, and a scanner may show it as something like C0031-13. The main code says which part of the car; the suffix says what kind of failure. MG publishes a dictionary of 102 of them, and 87 are actually used on this car. Take C0031, the left front wheel speed sensor. With suffix 13 it is 'circuit open' - a wiring or connector fault. With suffix 49 it is 'internal electronic failure' - the sensor itself. Same code on the screen, completely different repair and completely different bill. Suffixes in the 11 to 1F range are electrical faults, 30 to 3F are signal faults, 70 to 7F are mechanical, and so on. If a quote is based on the code alone without the suffix, it is a guess.
Aug 2023GeneralAll first-generation MG4.
Every fault code in MG's list carries a severity from I to IV, where I means stop the vehicle immediately. The catch is that MG does not define the middle of that scale consistently. Level III - the most common rating by a wide margin, covering 901 of the 2,163 listed faults - means 'repair as soon as possible' when it comes from the brakes, the body control module, the steering or the airbag system, but only 'inspection during maintenance' when it comes from the battery pack, the charging unit, the air conditioning or the rear motor. Those are not the same instruction. Several modules also split level II into IIA, drive slowly to the nearest place that can look at it, and IIB, go when it is convenient. So a bare severity number from a scan tool is not meaningful on its own; it only means something alongside which module raised it.
Aug 2023GeneralAll first-generation MG4.
Of the 1,171 fault codes MG documents for the MG4, only 179 sit in the standard ranges that a generic code reader is designed to recognise. The other 992 are manufacturer-defined - the ones beginning P1, P3, B1, B2, C1, U1 and U2. A basic OBD dongle will usually display those as a bare number, sometimes with a description borrowed from a completely different manufacturer's list, which is worse than no description at all. This is not a lock-out: the codes are all published by MG, and any workshop with the right software reads them properly. But it does explain the common experience of plugging in a cheap reader, getting a code, searching it online and finding an answer that has nothing to do with an MG.
Aug 2023GeneralAll first-generation MG4.
For 2,106 of the 2,163 fault entries in its list - just over 97 per cent - MG publishes a full diagnosis section: the conditions that set the code, what the module does once it is set, the possible causes, and a numbered sequence of tests to work through. It is the same information the dealer works from. That matters for anyone deciding between a dealer and an independent workshop, because the question is not whether the information exists but whether the workshop has bought access to it. It is reasonable to ask an independent whether they can pull up MG's own procedure for the specific code on your car, and reasonable to be wary of a diagnosis that skips it.
Aug 2023GeneralAll first-generation MG4.
Assume a 2023-delivered MG4 stays on the earlier seven-year battery terms: MG Australia's lift to 10 years / 250,000 km covers new MG models purchased from 1 August 2024 and was not presented as retrospective.
Aug 2024AUAustralian MG4 delivered before 1 August 2024 (i.e. all 2023 cars)
As at the 2023 Australian launch the MG4 had no over-the-air updating and fixes were dealer-applied, so check the OTA status on the actual car rather than assuming it.
Aug 2023AU2023 Australian-delivered MG4, all variants
MG4 windscreen replacement has repeatedly turned into a multi-week job — early glass had to come from China, and MG dealers have insisted on doing the forward ADAS camera calibration themselves rather than letting the glass company do it, so owners waited weeks between the new screen going in and the camera being set up. Calibration is dynamic: roughly ten minutes driving at 30-50 mph on roads with clear white lane markings, and one owner had four attempts at a dealer that never reached 100%. Book the calibration slot at the same time as the glass, not afterwards.
Sep 2023GeneralAny MG4 with the forward camera behind the screen; UK and NZ owners both reported long waits all variants
In a 2023 UK thread the glass itself took about three weeks through a glass company, but the ADAS camera calibration was the real bottleneck: one owner was given an eight-week dealer appointment because MG had not supplied the calibration laptop software to the glass firms, so only the dealer could do it. Insurance excesses quoted were £25 for a chip repair against £125 for a full replacement, so getting a chip repaired early is far cheaper as well as far faster. Ask up front who will do the camera calibration and book that slot at the same time as the glass.
date not establishedUK/EUAny MG4 with the ADAS camera; worst where the local dealer lacks calibration equipment. all variants
Trophy owners describe the dipped beam set too low, leaving a dark patch between dip and main, with main beam projecting up into the trees. One owner found the in-cabin levelling dial made no difference to the beams at all. Two owners report the aim was corrected on the mechanical adjusters behind each headlight under the bonnet — one did it himself by comparing against another car, the other had the dealer do it while the car was in for unrelated work. A third owner cautioned that turning those adjusters moved his dipped beam only about 1 cm on the garage wall, so don't expect a large range of adjustment.
date not establishedGeneralReported on Trophy-spec cars; the adjusters are behind the headlights on any MG4.
One owner's MG4 sat at a dealer for over 60 days waiting on a replacement infotainment screen at just 400 miles old, with the dealer only able to say weekly that there was no news on the part. At least two other owners described the same fault and month-plus waits while still paying finance and insurance. The practical remedies owners converged on were a courtesy car for the whole period (one covered 2,000 miles in his) and keeping a written record, because consumer law can still support rejection if repairs drag on unreasonably.
date not establishedUK/EUAny MG4 needing a major electronic part; the infotainment head unit is the repeat offender. all variants
Australian MG4 servicing is every 24 months or 40,000 km, but the two visits are not the same price: owners quote them alternating between about $296 and about $907, averaging roughly $300 a year. If you have only been told the $296 figure, you have been quoted the cheap half of the cycle. Ask the dealer for the full schedule of prices, not just the next one.
date not establishedAUAll Australian MG4s on the standard 24 month / 40,000 km schedule
An Australian reviewer records that his dealership's service department claim his faults are 'characteristics of the MG4' and therefore not reparable — covering the cabin heater, regen braking, speed sign recognition, infotainment and emergency braking. Separate reviewers describe MG Australia not returning promised callbacks: one made five attempts and was told each time someone would contact him within 48 hours — 'Not one call, not one email.' The escalation routes actually documented are a formal letter of demand (one dated 25 August 2025) and a written Australian Consumer Law claim that the car 'is not fit for purpose' and constitutes 'a major failure (dangerous, unprompted, unpredictable braking systems)'. A Fair Trading complaint also appears on the listing, but that one was lodged over dealership pricing conduct rather than a mechanical fault. Get any refusal in writing at the counter — that is the document an escalation runs on.
Aug 2025AUAustralian owners with recurring software, braking or infotainment faults across multiple service visits all variants
Owners who had the January 2023 software recall applied found it cleared all the car's settings and left the head unit's connected features dead: weather saying it could not get the data or to activate the head unit, in-car iSMART login failing with 'Device ID does not exist', the emergency rescue-call button doing nothing from the touchscreen, and MG Touchpoint placing the car in Germany instead of Wales. A second owner reported the same login and weather faults three weeks later, and the same class of fault was still being reported after R59 updates in July 2024, by which point a forum member had posted head-unit reactivation steps. Check those features before you leave the dealer. Note the thread itself never names the recall by number.
Jan 2023UK/EUMG4s that had RC008 / R/2022/355 applied; the same symptoms recurred on later R59 updates all variants
A forum moderator confirms the dealer's diagnostic laptop pulls module firmware from MG servers in China rather than the UK. What actually makes the job slow, per an experienced poster, is not the server but 'the slow connection between PC and Car over OBD Interface when updating all the modules' — the camera and small driver-display modules take longest because their files are the biggest. Reported times in this thread run from 45 minutes to nearly four hours, so budget most of a morning rather than a quick appointment, and note the MG4 was advertised as OTA-ready but never had it enabled.
date not establishedGeneralAll dealer module (SIPS/OBD) updates, as distinct from a USB infotainment flash
An April 2026 thread in the MG4 Urban forum covers service campaign SC098, a full software update across what one owner counts as the car's 23 different controller modules. The package is large enough that one dealer could not fit it on their laptop and was wiping a machine to make room. Owners in the thread are unsure whether it reaches the earlier 2022-2025 MG4 as well as the Urban — one says he can only speak for the MG4 but is fairly sure it is the same for the Urban — so ask your dealer by campaign number rather than assuming either way.
Apr 2026UK/EUSC098MG4 Urban (2025-on) only; explicitly not the 2022-2025 MG4 range all variants
Owners comparing Australian service schedules report the MG4 on a 24 month or 40,000 km interval, with a service plan extending to 14 years or 280,000 km. That is much longer than the annual or 15,000 km rhythm drivers coming from petrol cars usually assume, and it reflects how little routine maintenance an electric drivetrain needs. Costs reported for individual services varied a lot between the early and later visits, so ask for the whole schedule rather than just the next one.
Nov 2023AUAustralian service schedule as reported by owners; variant not identified as a factor all variants
MG Australia confirmed that no MG model sold in Australia offered over-the-air updates, and that MG4 software is applied at a dealer. The awkward part is notification. Owners learn about updates either through MG marketing emails if they opted in, or when a dealer mentions it at a scheduled service. Some dealers contact customers proactively and some do not. Updates done alongside scheduled servicing during warranty are complimentary, but an update requested outside a scheduled service can be charged at the dealer's discretion.
Nov 2023AUAustralian market, MG Australia spokesperson statement; applies across the Australian MG4 range all variants
The Australian MG4 is sold with a seven year, unlimited-kilometre warranty, which is among the longest offered on any car in the market and unusual in not capping distance. For a high-kilometre driver that combination is worth real money against rivals whose warranties expire on distance well before they expire on time. It is one of the strongest parts of the ownership case for the car.
Apr 2024AUAustralian market; applies across the MG4 range all variants
Australian fixed-price servicing for the MG4 was reported spanning roughly $296 to $962 per visit. That is a wide spread, and it is why owners are caught out: the early visits are cheap because there is almost nothing to do, and the expensive ones come later when items like brake fluid and coolant fall due. Budget from the full schedule rather than from your first invoice, and ask which visits carry the large numbers.
Apr 2024AUAustralian capped-price servicing across the MG4 range all variants
Australian owners report a shift in dealer behaviour around software. Where updates were once applied during a service as a matter of routine, owners now describe dealers restricting them to addressing specific reported warranty issues. The practical consequence is that turning up and asking for whatever is available may get you nothing. Owners who want an update describe the symptom it fixes when booking, so it is recorded as a fault being investigated rather than a general request.
2026AUAustralian dealer network; applies across the range all variants
Australian owners report that cars first registered after August 2024 qualify for a ten year warranty, not the seven year term printed on earlier material, and that this goes by registration date rather than build year. One owner with a 2024 Excite carrying a seven year sticker established that the car qualified for ten. If you bought a car that had been sitting in stock, this is worth checking, because the sticker on the car and the entitlement may not agree.
Apr 2025AUAustralian cars first registered after August 2024; applies across the range all variants
Australian owners comparing quotes found the Excite 51 coming in around $759 to $870 comprehensive with one major insurer, against $883 for the Camry it replaced, and as low as around $670 through another. The assumption that an electric car is automatically expensive to insure did not hold for these owners. Quotes varied widely between insurers for the same car and driver, with one heavily advertised insurer consistently among the most expensive, so it pays to get several.
Dec 2024AUAustralian owners insuring an Excite 51 in 2024; other variants will differ
Australian owners comparing comprehensive quotes in late 2024 reported an XPOWER at around $750 with one insurer, an Excite 51 at about $755 on agreed value with another, an Excite 64 at $990 rising to $1,100 with a novated lease clause, and an Essence 64 at $1,100 with a P-plate driver on the policy. Owners consistently noted that comparable Tesla and Polestar policies ran at roughly double these figures. The spread between insurers for the same car is large enough to be worth several quotes.
Oct 2024AUAustralian insurance quotes across several variants in 2024 all variants
MG Australia extended cover from seven years unlimited kilometres to ten years or 250,000 km across all MG4 variants in August 2024, with the traction battery explicitly included rather than covered under separate terms. The detail that matters most is that owners report it holding even if the car is serviced outside the MG dealer network, which is unusual and removes the usual lock-in. Note the trade: the new term adds three years but introduces a distance cap that the old one did not have, so a very high-kilometre driver may have been better off under the old terms.
Aug 2024AUAustralian market from August 2024; applies across all MG4 variants
A useful corrective to the assumption that newer software is always better. An Australian owner reports traffic jam assist lane centering that used to hold the lane perfectly becoming erratic at highway speed on well-marked roads, deteriorating with successive updates. Separately, an update that fixed Android Auto problems broke the tyre pressure monitoring display, which then needed a further update to fix. Neither is a reason to refuse updates, but it is a reason to note what worked before one and to report regressions rather than assuming you imagined it.
2024AUReported on Australian cars; applies across the range all variants
Concrete Australian capped-price figures from owners: roughly $296 for the year two service and about $907 for the year four one. The reason for the jump is what falls due at the later visit, which includes transmission fluid, brake fluid, battery coolant and cabin filters rather than anything wearing out. Averaged across the life of the car owners calculate around $250 to $300 a year, but the invoices arrive very unevenly and the year four bill surprises people who budgeted from the year two one.
Aug 2023AUAustralian capped-price servicing; applies across the range all variants
Several owners report that a scheduled service left the infotainment software untouched, in one case even after the owner specifically asked for it to be updated and the car stayed on an old version. If you are chasing a fix that comes with a software update, do not assume the service will apply it. Ask for the infotainment and control-module software to be updated by name, get it written on the job sheet, and check the version afterwards rather than trusting that a service brings everything current.
2025GeneralOwner reports of 2025 service visits; applies across the range all variants
MG's programming and configuration manual shows that the front infotainment control module is updated from a dedicated USB flash drive rather than through the dealer diagnostic system. The diagnostic system is used for configuring the module and for the replacement procedure, but the software upgrade itself is a USB operation performed at the car. The manual specifies a USB 2.0 or better drive, the upgrade package unzipped into the root directory of the drive with no other files present, the drive ejected safely rather than pulled out, and the drive inserted in the front USB port. The same USB route is documented for updating the telematics module.
Jul 2023GeneralDocumented for the MG4 generally; the manual describes more than one head unit type, so the on-screen steps differ by trim
Several owners found the dealer sealant repair did not permanently cure the leak, with the pool returning after the next heavy rain; one owner made four visits to two dealers over roughly a year and still had recurrences, and an earlier owner rejected the car after a replacement seal failed. A big reason the repair is hit-and-miss is that the ingress usually happens while driving, in sustained heavy rain, or when parked nose-up on a slope, so bench hose, watering-can and jet-wash tests often come back completely dry. Owners advise handing the car over with the standing water still in the boot so the dealer can actually see it.
2024GeneralRecurrence and non-reproducibility of the water leak at dealers all variants
Owners discovered that MG's warranty carves rubber components, including door/boot seals and vent gaskets, out of the headline seven-year cover and limits them to 36 months or 45,000 miles. So a water leak first found after three years, even a seal or vent-gasket fault, can be refused as out of warranty, and the dealer may charge a diagnostic/investigation fee (quoted around 160 pounds plus) simply to look at it. One dealer also had no courtesy cars available for months and needed the car for two days to investigate, which pushed at least one owner toward fixing it himself.
Mar 2026UK/EUUK warranty rubber-component sub-limit and out-of-warranty diagnostic fee for leaks all variants
When a dealer proved an owner's tyres were flat-spotted, MG's importer declined to cover them, citing a tyre warranty of zero miles and zero time, on the basis the tyres are worn from the moment the car is driven off the ship. The dealer instead secured a goodwill contribution (around 400 pounds) toward a replacement set of CrossClimate 2 all-seasons, with the owner paying only the price difference and no fitting or balancing charge. Others pointed out that a genuinely defective tyre is separately covered by consumer-rights law and by the tyre manufacturer, regardless of what the vehicle warranty excludes.
Nov 2022UK/EUUK/EU; factory tyres excluded from vehicle warranty, cost recovered via goodwill or consumer rights all variants
New MG4s sold in the UK include MG Assistance, an AA-provided roadside breakdown package, at no extra cost, and there's usually a wallet-sized card in the glovebox with the number on it. It's tied to the car rather than the driver, covers breakdowns within the UK only, and owners report it turning out for punctures, flat 12V batteries and lock-outs, often within the hour. The twist several owners flagged is that having the car serviced at an MG dealer renews the cover for another year, so keeping to dealer servicing keeps the breakdown cover alive. If you already hold personal AA or RAC membership you may be double-covered; some owners asked their own provider to suspend that policy while the manufacturer cover runs.
Sep 2023UK/EUUK new-car MG Assistance (AA) breakdown cover, free, renews on MG dealer service all variants
The same model in different countries gets completely different treatment. One owner outside the UK was telephoned and invited in for an update a fortnight before his first service without ever asking for it, while UK and Australian owners on the same thread are told nothing exists unless a fault is recorded first, because the workshop is not paid for the work otherwise. Access also lags at dealer level: one European member's dealer only obtained a release seven months after it appeared elsewhere. So a dealer saying there is nothing available for your car may be describing their own access rather than the state of the software.
Feb 2026GeneralDealer update policy and file access, compared across national MG distributors all variants
MG sells time-limited access to its official repair and service systems, and with a compatible diagnostic interface owners on this thread have used it to bring every module on their car up to date themselves. One member paid for a single hour and had the car substantially updated inside an afternoon, reporting a noticeably quicker screen and a far more reliable connected-car link afterwards. Through 2026, though, several owners paid and never received working sign-in details, or found the details rejected even when the same ones worked on MG's service portal, and had to reclaim the money through PayPal; emails to MG went unanswered. Treat this as something that sometimes works, not a dependable alternative to a dealer.
Jul 2026UK/EUOwner self-service access to MG's official update system, mostly European experience all variants
An owner who disliked what a dealer update had taken away installed the older file himself; the car then reported the older version, but the interface stayed exactly as the new one, so none of the features he wanted back came back. Another owner reverting an Australian car to its factory version did get a genuine rollback and recovered a broken reversing camera. So a downgrade is worth trying if an update has cost you something, but do not count on it: sometimes only the version label goes back.
Jun 2026GeneralReverting a head-unit software update all variants
MG specifies Shell E-Fluids E6 iX for the single-speed two-stage reducer, with a dry fill of just 0.75 litres, and says the internals are lubricated by splash - the gears fling the oil about, there is no pump. The casing carries an oil filler plug, a drain plug, both sealed with aluminium washers, and a vent plug assembly with a sealing tube at the top. That tiny oil volume is why the oil leaks owners reported were worth taking seriously: there is very little to lose before the gears are running dry. It is also the context for the breather modification that cured them - if the gearbox cannot vent as it warms up, internal pressure pushes oil past the shaft seals. If you find oil under the rear of the car, this is the assembly to name at the dealer.
2023GeneralFirst-generation MG4 electric drive unit reducer; UK/EU document. all variants
Reading MG's symptom tables end to end, the same part keeps appearing as a possible cause: the body control module. It is listed for a headlight that will not light and one that will not switch off, for indicators, brake lights, reversing lights and the rear fog lamp, for a single dead window, for a door that will not release from the outside, and for a charge flap that will not open. The practical consequence is that a car showing two or three unrelated-looking electrical oddities at once is not necessarily two or three faults. It is worth putting all the symptoms in front of the workshop together rather than reporting them on separate visits, because MG's own documentation points them all at one module.
May 2022GeneralInferred from the common cause listed across MG's lighting, window, door-lock and charge-flap symptom tables. all variants
As of November 2023 the MG4 received no over-the-air updates in Australia, so every firmware fix meant booking the car in to a dealer.
Nov 2023AUall 2023 MG4, Australian market
As of MG's November 2023 statement, no MG sold in Australia offered over-the-air updates, so MG4 software is dealer-installed and a single visit can run to hours.
Nov 2023AUAustralian MG4, all 2023 variants
One UK owner had three updates applied in one March 2025 visit — lane keep assist, charger pin and immobilisation — and the immobilisation one failed on the first attempt. After it was reapplied the car showed power being delivered but would not move and could not be shifted to neutral for towing; the dealer found the rear wheels locked and needing a special key from MG to release. A week later the car was still in, with no courtesy car and no communication, and the thread records no resolution. Experienced owners note a scrambled module usually has to be programmed as a replacement, not re-updated.
Mar 2025UK/EUAny MG4 having several module updates flashed in a single visit all variants
MG's Australian service sheet carries "check for any outstanding campaigns" and "software updates as required" as standard line items, so a routine service is the appointment at which pending updates go on. You do not need to book a separate visit to ask for them.
August 2026AUAustralian dealers. Observed on a 15,000km first service on a 2025 MG ZS, not an MG4 - the same MG service sheet is used across the Australian range but the campaigns themselves are per-model all variants
An Australian owner's main complaint about the car was the cost of scheduled servicing, singling out the 80,000 km service as the expensive one. Early services are inexpensive because there is very little to do on an electric drivetrain, which makes the later ones a surprise if you have budgeted from the first invoice. Ask the dealer for the full capped-price schedule across the whole plan when you buy, not just the price of the next visit.
May 2024AUAustralian capped-price servicing; reported by an Excite 51 owner but the schedule applies across the range all variants
Because Australian MG4s have no over-the-air updating, whatever software is on the car when you collect it is what you live with until your next dealer visit. The advice from an Australian buyer is to request in writing, before delivery, that all available software updates are installed, explicitly including satellite navigation map updates. Putting it in writing matters because it becomes part of the pre-delivery expectation rather than a favour you are asking for afterwards.
Sep 2024AUAustralian delivery process; applies across the range all variants
One Australian owner's practice, and a good one: request written confirmation of the updates performed at each service. Because the MG4 has no over-the-air updating and no owner-visible update log beyond a version string, there is otherwise no record of what was done. That matters when a fault recurs, when you are trying to establish whether a known fix has been applied, and when you sell the car. It costs nothing to ask at booking and is much harder to obtain afterwards.
2026AUAustralian owner practice; applies across the range all variants
An Australian owner who collected a car in October 2023 was told by the dealer it had the latest software, and later established it had never been updated, because one-pedal driving was absent and that had been added by a campaign. This is the practical risk created by there being no over-the-air updating and no owner-visible update history. Do not take a verbal assurance at handover; check the version string yourself and ask for written confirmation of what was applied.
May 2025AUAustralian delivery in 2023; applies across the range all variants
An Australian owner working out the whole-of-life cost from the published capped-price schedule arrived at roughly $300 a year averaged over twelve years. That smooths out the very cheap early visits and the expensive later ones, and it is a fairer basis for comparing against a petrol car than either individual figure. The items that make the later services cost money are periodic replacements such as brake fluid and coolant. Brake pads, by contrast, last far longer than on a petrol car because regenerative braking does most of the work.
Oct 2024AUAustralian capped-price servicing; applies across the range all variants
A logistics quirk with real consequences for Western Australian buyers. Electric vehicles cannot travel on the coastal shipping route used for other cars, so they go by road or rail across the country, and owners report waits of up to three months for stock to arrive in WA. If you are buying in Western Australia, treat any delivery estimate from a dealer with scepticism and get the expected date in the contract rather than in conversation.
Oct 2024AUWestern Australian deliveries; applies to electric vehicles generally rather than the MG4 specifically
Australian pricing moved a long way in 2024, with the Excite 51 promoted at $30,990 driveaway before rising by $2,000 in November, and factory bonuses of several thousand dollars appearing and disappearing. Owners who had bought earlier at higher prices reported MG making goodwill offers, including free servicing years and a home charging outlet. If you bought shortly before a large public price cut, it is worth asking rather than assuming nothing is available.
Oct 2024AUAustralian buyers in 2024; the offers reported related to Excite and Essence variants and the Long Range 77
Australian owners note poor resale on the XPOWER, to the point where dealer demonstrators were listed below privately advertised used examples. Combined with insurance running higher than the single-motor cars, at over $1,200 a year for an older driver with a clean history, the XPOWER's ownership costs sit well above the rest of the range. If you want one, that weak resale works in your favour buying rather than against you, provided you are not planning to sell soon.
2024AUAustralian XPOWER market in 2024
Australian owners flag genuine confusion caused by MG products reaching the market through more than one importer and network arrangement over time. The practical consequence is that warranty handling, servicing entitlements and who you escalate to can differ depending on where and when the car was bought. If you get inconsistent answers from different dealers about the same question, this is often why. Ask who actually holds the warranty obligation for your car rather than assuming every MG dealer is equivalent.
Jul 2023AUAustralian market arrangements; applies across the range all variants
An Australian owner who needed recovery reported MG's roadside assistance providing a tow but described the handover process as slow, with the truck taking 60 to 90 minutes to arrive. That is not unusual for roadside recovery generally, but it is worth calibrating expectations, particularly if the reason you are stranded is a flat 12V and you are somewhere exposed. Knowing that a jump pack in the cabin would have saved the wait is the practical takeaway.
2026AUOne Australian owner's experience; applies across the range all variants
Because the MG4's first scheduled service is a long way off at 24 months or 40,000 km, there is a long gap in which nothing gets professionally looked at. An Australian buyer's advice is to negotiate a complimentary 1,000 km checkup as part of the deal. It is a cheap thing for a dealer to concede while they are trying to close a sale, and it catches the early settling issues, loose trim, and delivery pressures that would otherwise go unnoticed until year two.
Sep 2024AUAustralian purchases; applies across the range all variants
An Australian owner had a lane keep assist software update applied in August 2024, and was offered and accepted more than ten further updates at the same visit, with the work taking around four hours. That is a useful marker for anyone wondering whether their car is current: if it has not been to a dealer since mid-2024, there is a substantial backlog of software it has not received. It also shows the scale of a catch-up visit, so book the car in for the day rather than expecting to wait for it.
Aug 2024AUAustralian dealer update in August 2024; applies across the range all variants
Concrete Australian figures from an owner who reached his first scheduled service at 43,000 km, having had a check at 1,000 km two years earlier. The bill was $467 including an optional air conditioning service, and he judged it good value. Brakes were reported as fine, which is consistent with regenerative braking doing most of the work, but the tyres all needed replacing and a wheel alignment was recommended. On this car the consumables that cost you are tyres, not brakes.
Jan 2025AUAustralian Essence 64 at 43,000 km
An Australian owner valuing his two-year-old Essence 64 at around 43,000 km found $23,000 to $25,000, and noted his previous MG had held value better. The reason is not the car: MG cut the new price by roughly $10,000 over that period, and used values follow new prices down. Anyone buying used benefits from this; anyone who bought early and is selling does not. It is worth understanding as a market effect rather than a judgement on the MG4's durability.
Jan 2025AUAustralian Essence 64 valued at two years and 43,000 km
UK owners reported being charged around £120 upfront for diagnostics on vehicles still in warranty, alongside slow parts supply and poor communication during repairs. The charge is normally refunded if the fault turns out to be a warranty item, but that is not always made clear at booking. Ask before you hand the car over whether the diagnostic fee is refundable if a warranty fault is found, and get the answer in writing.
Jun 2023UK/EUUK dealer practice in 2023; applies across the range all variants
An owner whose rear discs were badly corroded from long pre-sale storage had both the discs and pads replaced by the dealer at no charge, alongside a replacement passenger door handle and driver's footrest. Other members were surprised, since brake discs and pads are normally treated as wear-and-tear consumables that a dealer would at most clean up and re-grease rather than replace for free. It shows storage-related corrosion can be argued as a supply/condition fault rather than owner wear, but the outcome depended on the dealer's goodwill.
Feb 2023UK/EUUK dealer replaced storage-corroded rear discs and pads free, though normally wear items
The undertray under the battery bulges and sags, and MG's remedy is a support bracket — part number 11769392, quoted on the forum by a moderator, with at least one UK dealer showing it in stock. Ask by bulletin number, because owners repeatedly hit dealers who denied all knowledge of both the bulge and the bracket; one owner was told MG no longer supplies it and it is out of stock, yet others had it ordered in about a week and fitted in roughly half an hour at a service. What the thread does not establish is a price, the bolt count, or trays being lost in standing water.
Nov 2025AU+UKAS-TEC-02112023-01Any 2022-2025 MG4 whose front undertray edge hangs below the sill line; worst if you drive through standing water at speed all variants
MG has issued a technical bulletin covering the water-in-boot problem, with a dedicated sealant parts kit the dealer must order in. The documented repair means removing the rear bumper, applying the specified sealant to a gap in the bodywork sealing behind the bumper, and leaving it to cure, so it is typically a two-day job rather than a quick reseal. Owners have seen the printed bulletin, with strip-down photos, in their service paperwork, though dealers generally do not hand a copy over. Note that owners disagree over what the bulletin targets: at least one dealer stated it seals a gap in the bodywork behind the bumper and not the vent flaps themselves.
Aug 2024GeneralDealer-applied sealant bulletin, bumper-off, ~2-day cure all variants
The very first numbered item in MG's UK Pre-Delivery Inspection manual for the MG4 tells the technician to check the register of service actions, recalls and technical bulletins and to carry out anything outstanding before touching the rest of the car. The later revision of the manual widened the wording from just 'service action bulletins' to explicitly include recalls and technical bulletins, and the same line heads both PDI tick sheets and both maintenance check sheets. That matters because owners are routinely told a fix is not available for their car: if a campaign existed when your car was prepared, applying it was not optional, and the signed PDI sheet filed with your customer record is the dealer's certificate that it was done. Ask to see that sheet, and ask again at every service, because the maintenance sheets repeat the same requirement.
2023UK/EUUK PDI and service process; the obligation to clear outstanding campaigns before handover and at every service.
The German-market version of the same breather bulletin adds detail the English one leaves out. When the gearbox oil is checked as part of the repair, roughly 0.7 litres (plus or minus 0.05) has to be put back in, and MG tells workshops the drained oil may be caught and reused. Critically, it also says that if the oil contains metal particles or is otherwise in poor condition, the dealer must stop and contact MG technical support rather than simply refitting it - that is the point at which the problem is no longer a leaking breather. MG Germany supplied the repair kits to dealers free of charge and told them not to claim the parts back on warranty. If your car has this repair done, it is worth asking what the drained oil looked like and whether it was replaced or reused.
Mar 2023UK/EUGerman-language MG Motor Deutschland bulletin; free repair kits and parts claiming are German dealer process only. all variants
MG ran a service campaign in December 2022 - SC42, bulletin SI-SC2022122201 - because the driver monitoring system was not adapting well to how customers actually drive. The fix is not a mechanical one: the configuration in three modules (the instrument pack, the infotainment head unit and the front camera module) is reloaded to a newer level, and MG told dealers to reload all three even if the files already looked current. The genuinely useful part for an owner is the verification step MG gives its own technicians: after the campaign the function is renamed in the car's menus from 'Driver Drowsiness Detection' to 'Driver attention warning system'. If your car still shows the old wording, the campaign has not been applied. Cars sitting in stock were supposed to be done before delivery, and eligibility was by VIN list, so a car that changed hands early could have been missed.
Dec 2022UK/EUEuropean VIN-list campaign from Dec 2022, so it covers launch-period cars only; Australian equivalence not stated.
Technical Information TI-20231228, issued by SAIC Motor CEE, describes what owners call the drooping undertray: after a long period of driving, the gap between the rear subframe lower guard and the high-voltage battery can open up. The remedy is an aftersales aluminium alloy bracket (part 11769392) mounted externally on the guard to control the gap, held by two longer bolts (90006778) replacing the originals, all torqued to 4-6 Nm, with the middle mounting point keeping its original bolt. It is quoted at 0.2 hours and claimed under fault code 62 (IMPROPER CLEARANCE). The line that matters most to an owner is in capitals in the document: no proactive action is needed and no marketing activity was run, and the work is to be done only where a customer raises the concern. So a dealer saying there is 'nothing outstanding on your car' is not the same as saying nothing exists - you have to report it.
Dec 2023UK/EUSAIC Motor CEE technical information, Central and Eastern Europe; explicitly complaint-driven, not a campaign. all variants
If the airbag warning lamp comes on and the stored fault is B0021-1A - left curtain airbag resistance too low - MG's documented first action is not to replace the airbag. Bulletin SI-TB2023072101 tells the dealer to remove the connector at the airbag control module (shown as BY068 on the wiring diagram), separate the green locking lever from the cover hinges and fit a new lever, then refit and re-diagnose. The new lever is identified by a spot of white paint because it is otherwise indistinguishable from the old one. The whole job is 0.6 hours plus a small connector part, and only if the fault survives the repair is it escalated to MG for further support. If you are quoted for a curtain airbag replacement on this fault code, this is the document to raise first.
Jul 2023UK/EUMG Motor Europe bulletin; applies to the specific fault code B0021-1A, not to airbag lights generally.
Australian owners found the front plastic undertray sagging on new cars, and MG Australia's fix is a metal bracket done under warranty at no cost. Owners who spotted the dip at handover made the dealer do it before they accepted the car; one dealer quoted a couple of hours, another forum member said it is about a ten-minute job. Look under the front of the car at delivery and quote the bulletin number.
date not establishedAUAS-TEC-02112023-012023 and 2024 Australian-delivered cars with a visible dip in the front underbody cover all variants
MG Australia released a software update for all MG4 variants to improve autonomous emergency braking, under bulletin AS-TEC-07022024-01 dated 7 February 2024, described as the MG4 AEB Software Update. It targets the forward collision warning system and specifically the behaviour when cars are turning across traffic, which is one of the situations owners described as triggering unexpected braking. Every Australian MG4 has forward collision warning as part of MG Pilot, so it applies across the range.
Feb 2024AUAS-TEC-07022024-01All Australian MG4 variants, since forward collision warning is part of MG Pilot on every one
Useful for working out whether the phantom braking software update is relevant to your car. Australian owners understand the emergency braking update to apply to vehicles built up to and including February 2024, with cars built after that expected to leave the factory with it already installed. If your car is older than that and has not been back to a dealer, it is a strong candidate for the update. If it is newer, the update is probably not what is causing your problem.
Dec 2024AUAustralian cars built to February 2024; applies across the range all variants
The Australian undertray bulletin turns out to be a small job. Owners report the remedy is a metal bracket fitted under warranty to stop the undertray sagging, and that the dealer work takes around ten minutes. Several owners had it done proactively on 2023 cars without having complained, while others had to ask for it and were then accommodated. Given how cheap it is to do and that a sagging undertray is one of the suspected causes of highway vibration, it is worth asking about at your next service whether or not you have a symptom.
Oct 2024AUAS-TEC-02112023-01Australian bulletin; build range not stated by owners, so all variants are listed
The undertray problem has a history worth knowing. UK owners reported the protective undertray sagging and buckling as early as 2023, with reports of dealers declining to repair it or simply removing the tray altogether. Australia later got a formal bulletin with a bracket fix. If a dealer proposes removing your undertray rather than fixing it, that is not the remedy: the tray is there for aerodynamics and to protect the underside, and a bracket fix exists.
Mar 2023AU+UKReported on UK cars in 2023; the bracket remedy is documented for Australia all variants
The early gearbox oil leak that worried a lot of prospective buyers has a resolution. UK owners reporting it in April 2023 had it addressed by May via a breather pipe modification, which is a small job rather than a gearbox replacement. If you are looking at an early car and find oil leak reports in its history, the question to ask is whether the breather modification was carried out, not whether the gearbox was replaced.
Apr - May 2023UK/EUEarly UK cars from 2023; the Long Range 77 and XPOWER arrived later
If your radio randomly freezes, loses sound, changes station on its own or needs a reboot to come back, you are not imagining it and it is not something you are doing wrong. Cars from roughly 2022 to 2024 were built with a separate external DAB radio module that runs hot and has buffering faults, a part substituted in during the chip shortage. Later cars moved that hardware onto the main infotainment board, which is why newer cars behave differently. The real fix is having the module replaced under warranty, not another software reflash, so ask the dealer specifically about the DAB module rather than accepting 'no fault found'.
2024 - 2026GeneralCars built roughly 2022-2024 with the external DAB module; later builds moved it onto the main board all variants
MG's programming and configuration manual documents a battery management system parameter backup and write procedure. Before a battery management module is replaced, the dealer diagnostic system reads the battery data, mileage, date and other information from the old module, and after fitting writes that information into the new one. The manual gives a separate procedure for the case where the old module can no longer communicate, in which case the backup step is not possible. The execution conditions include that nobody sits in the driver's seat during the operation and that the 12 volt battery is on an external charger.
Jul 2023GeneralDocumented for the MG4 generally, so all variants are listed
In February 2025 an MGEVs.com member posted the output of an MG4-specific GPT he was training. It cites a Technical Information bulletin, TI-20240321-EH32, and says the XPOWER's high-speed vibration occurs specifically around 110 km/h, is felt in both the steering wheel and the seat, and is primarily caused by the driving shaft acting as an excitation source. Another XPOWER owner replied that this matched what he had observed since October 2023. The reference number is worth quoting to a dealer, but note what the source actually is: an AI summary posted by an owner, not the document itself — nobody in the thread posted the bulletin, and no title for it is given.
Dec 2024GeneralTI-20240321-EH32MG4 XPOWER at steady cruise around 100-120 km/h; vibration felt through steering wheel and seat
MG's technical bulletins are not published, but one long-standing forum member lists three by number: AS-22-TB053, which updated the charge control unit, gateway and instrument cluster (CCU, GW, IPK); AS-22-TB059 for the forward camera module (FVCM); and AS-22-TB061 for the body control module (BCM). The same thread names SC47 and SCUK001 as service campaigns. Only one poster gives these codes, so treat them as a lead to hand the service desk rather than confirmed MG documentation. The CCU work here was software; a hardware CCU replacement is a separate, much more expensive job.
Nov 2023UK/EUAS-22-TB053AS-22-TB059AS-22-TB061SCUK0012022-2023 MG4s at UK dealers; CCU/gateway/cluster, forward camera and BCM modules all variants
An Australian round-up of software work in development listed several items: a refinement of lane keep assist being adapted from the UK version, which reportedly softened the aggressive steering corrections; wireless CarPlay and Android Auto possibly enabled through an add-on device; a new voice command; a toggle for the built-in navigation's suburb alerts; customer-installable map updates via USB under investigation; and the possibility of custom drive mode settings persisting between trips. The article noted these were aimed mostly at Essence and above, with the Excite receiving fewer changes because it has fewer infotainment features to change.
Feb 2025AUAustralian variants; the article notes Excite receives fewer updates than Essence and above all variants
MG Australia issued a technical bulletin covering an undertray fix, reference AS-TEC-02112023-01, and Australian buyers were advised to confirm it had been carried out before taking delivery. This is worth knowing beyond delivery day: owners chasing a rumble or vibration at highway speed have repeatedly suspected an undertray that is not properly secured, where it can flap and transmit into the body. If your car has an unexplained vibration, asking whether this bulletin has been applied is a cheap first question.
Sep 2024AUAS-TEC-02112023-01Australian bulletin; the build range it covers is not stated in the source, so all variants are listed
Some UK-market 2022-build MG4s could superlock while still in running mode when coming to a stop, leaving the doors unopenable from inside or out, and were fixed free of charge under UK recall R/2022/355.
Jan 2023AU+UKUK-market MG4 2022 build (1,960 vehicles); not found as an Australian recall
If your MG4 is a UK or European car, ask your dealer about the free service campaign SC077, which updates the steering and front radar modules and makes lane-keep assist markedly less aggressive.
Jan 2025UK/EUSC077AS-25-006EU MG4, all variants 2022-2025; NOT confirmed for Australia
A pool or stain of oil on the driveway, escaping from around the reduction gearbox breather, is the MG4's headline mechanical fault and was never an isolated case.
Oct 2022 onwardsUK/EUmultiple trims incl. SR and Trophy (UK naming); early build cars worst affected all variants
Australia's national vehicle recall register lists five SAIC Motor Australia recalls — MG3 (Nov 2025), MG HS PHEV and HS +EV (May 2023), MG3 (Jun 2021), ZS (Nov 2018) and MG6 (Aug 2018) — and no MG4 of any variant. Searching the register for the supplier rather than the model returns the same five, so this is not a model-name spelling problem. Don't read it as "nothing was ever fixed": a recall is a safety defect notified to the regulator, and the MG4 work owners talk about — the XPOWER vibration measures, the undertray bracket, the module updates — is service-campaign and technical-bulletin territory, which never appears on this register.
Aug 2026AUAustralian-delivered MG4, all variants; register state as at 12 August 2026
The ACCC's consumer product recall search at productsafety.gov.au is a different database from the national vehicle register at vehiclerecalls.gov.au. Searching the ACCC site for MG4 returns nothing at all, and searching it for MG Motor returns five items that are a 2014 MG6, a 2017 MG6 Plus rear seat and three unrelated vehicle-accessory recalls. If you want to know whether your car has an outstanding recall, use vehiclerecalls.gov.au and search by supplier or model — a blank result on the ACCC site tells you nothing either way.
Aug 2026AUAustralian owners checking for outstanding recalls; both registers as at 12 August 2026
The UK vehicle recall register lists a single MG4 recall, reference R/2022/355, launched on 07-01-2023 and covering roughly 1,960 vehicles. The defect was that the car could superlock while still in running mode when it came to a stop. In that state the doors could not be opened from the inside or outside handles, the remote key was disabled, and the windows would not operate. The remedy was a software update.
Jan 2023UK/EUUK-registered 2022 model year MG4; the mapping onto Australian variant names is not established, so all variants are listed
The Australian Government vehicle recall register was searched directly on 5 September 2026 by two independent methods: a free-text search for MG4, and the register's own manufacturer filter for the make MG. The make filter returns seven MG recalls covering the MG3 (2021, and 2024-2025), the MG HS PHEV and HS +EV (2021-2022), the ZS (2016-2018), the MG6, the MG TF and the MGF. The importer filter for SAIC Motor Australia returns five recalls, being the MG3 twice, the HS plug-in hybrid, the ZS and the SAIC MG6. The MG4 does not appear in any of them. A control search for MG3 returned the two known MG3 recalls, which confirms the search itself was working rather than silently failing.
Sep 2026AUSearched for the MG4 across all model years on the Australian register; no variant appeared, so all variants are listed
The book contains dedicated 'Vehicle Safety Recalls' and 'Vehicle Service Actions' pages, and MG's own text says that if a recall campaign affects your car you will be contacted and invited to have it inspected free of charge, with the work recorded on that page. It also tells you what to do if you think you have been missed: contact an MG Authorised Repairer or a suitable service centre and ask. Two practical uses - recall rectification never costs you anything, and when you are looking at a used MG4 those two pages are the quickest way to see which campaigns and service actions the car has actually had done rather than which ones it was eligible for.
2023UK/EURecall handling and record-keeping as described in the UK/EU service book.
Service campaign SC47 (bulletin SI-SC2023031001, dated 10 March 2023) had dealers reprogram the charging control unit to a newer version in order to improve charging performance. Eligibility was by VIN list rather than by symptom, cars sitting in stock had to be updated before they were handed over, and the job was quoted at 0.4 hours with the diagnostic report attached to the claim as a condition of payment. Because it is a VIN-based campaign rather than a recall, nobody necessarily contacts you about it, and a car that changed hands or was imported can slip through. If you have an early MG4 and charging has never been quite right, it is reasonable to ask the dealer to check your VIN against SC47 specifically.
Mar 2023UK/EUEuropean VIN-list service campaign from March 2023; covers launch-period cars, Australian equivalence not stated.
MG Motor Australia issued technical bulletin AS-TEC-07022024-01, dated 7 February 2024, to address false AEB and forward-collision activations, so quote that number when booking the car in.
Feb 2024AUAS-TEC-07022024-01all Australian MG4 variants (FCW is part of MG Pilot on every AU trim)
A service campaign dated 1 September 2023 added one-pedal driving to the Australian 51 kWh LFP Excite after launch, so a used 2023 example may not have it unless the campaign was carried out.
May 2024AUExcite 51 (LFP) only, Australian market
On any used 2023 MG4, check both that the modified higher gearbox breather is fitted and that there is no fresh oil under the motor, since a few 2023-build cars still leaked after the change.
Aug 2023AU+UKAustralian-delivered MG4; fix also rolled out in UK/Europe all variants
The GOV.UK check-vehicle-recalls service returns 'This vehicle has no recalls' for MG MOTOR MG4 model year 2023. The superlock recall sits under model year 2022 instead: R/2022/355, launched 07-01-2023, 1,960 vehicles, for MG4s superlocking while still in running mode — doors unopenable from inside or out, key disabled, windows dead — remedied by a software update. A clean result on a 2023 car therefore proves nothing; check the 2022 listing as well, and note that service campaigns are not what this service is for, so ask the dealer separately by SC number.
Jan 2023UK/EU2023 model-year MG4s checked on the UK DVSA recall service
On this thread UK XPOWER owners discuss whether a recall is coming for the high-speed steering vibration. One rang his dealer's service department in March 2024 and reported back "No recall or comment from MG". Another points at the Australian steering-damper story, dated 17 November 2023, and adds "I'm pretty sure that's an old story from Australia and that the steering damper does not fix it anyway" — an opinion rather than the experience of someone who had one fitted. Some owners weighed up wheels or suspension changes instead, but held off over warranty. If you want the prevalence figures or the Australian damper campaign details, cite the poll thread and the Australian coverage directly — they are not in this discussion.
Nov 2023AU+UKMG4 XPOWER at sustained highway speed; Australia got the parts campaign, the UK did not
The Australian recall register's search only responds to the field named on its own browse page. Constructing a web address with a search term in it, which is a common way to link straight to a result, is silently ignored: the page loads normally and shows the full unfiltered list of every recent recall for every manufacturer, with no error and no indication that the search term was dropped. Several older, plausible-looking addresses for the site also redirect to a page-not-found notice at the top of the site rather than to a search.
Sep 2026AUA property of the register website, not of any particular MG4 variant, so all variants are listed
Australian XPOWER buyers reported a vibration between roughly 80 and 110 km/h (worst near 100), and shortly after delivery the AWD XPOWER was put on a sales stop and recalled for a steering-arm damper / anti-vibration upgrade. One Sydney owner had the new part fitted and said it made no difference, leaving the car back with the dealer. Owners suspect the XPOWER's vibration is a different phenomenon to the tyre flat-spot issue on the two-wheel-drive cars, possibly linked to the dual-motor drivetrain, though tyres and balancing were still in the mix.
Dec 2023AUAustralian XPOWER; sales stop and steering-arm anti-vibration part, effectiveness disputed
MG Motor Australia paused MG4 XPOWER customer deliveries in November 2023, adding a revised steering damper to the pre-delivery inspection in both Australia and New Zealand after customer feedback about how the car felt at higher speeds. The upgrade was offered free of charge to existing and future MY23 and MY24 XPOWER customers; only about 15 cars had already been delivered and those owners were contacted. If you bought an early Australian XPOWER, check your service history actually shows the damper was fitted.
Nov 2023AUMY23 and MY24 MG4 XPOWER delivered in Australia and New Zealand
A forum regular sets out MG's convention: "If it's a recall then it'll have an RCxxx number. If it's an SCxxx number then it's a service campaign item, but dealers are lazy and just call them all recalls." RC008 is the MG4's 'getting locked in' superlock fix, and a genuine recall brings a DVSA letter — one owner had his done a year earlier off the back of one. Because dealers use the words interchangeably, ask for outstanding work by bulletin number rather than asking whether there are 'any recalls'. This thread does not establish that RC008 is the only MG4 recall, and does not mention SC077, SC047 or SCUK001.
Jan 2024GeneralSC077SC047SCUK001All 2022-2025 MG4 variants; the naming is MG's own dealer convention, used in both AU and UK
An owner's October 2023 dealer booking confirmation reads "carry out MG campaign SCUK001 Software updates to be completed (EVCC, FDR, BCM, FICM)" — the EV charge controller, front detection radar, body control module and forward camera module, all in one visit. The same owner hoped it would cure lane-keep and AEB behaviour, AC charger compatibility, head-unit black screens, Android Auto and Bluetooth dropouts, but that is what he was hoping for, not a documented scope, and the confirmation lists no symptoms. A moderator corrected owners calling it a recall: "That's a Service Campaign item (the bulletin will be SCxxxx) not a recall (which would be RCxxx, like the locking in one was RC008)." Ask your dealer whether SCUK001 specifically has been applied, by number.
Nov 2023UK/EUSCUK001UK MG4s delivered 2022-2023, applied at dealer service all variants
Checked in September 2026, the UK government recall register returns no recalls for the MG4 in either the 2023 or the 2024 model year, stating plainly that the vehicle has no recalls. The only MG4 entry on that register remains the 2022 model year superlocking recall. This is worth knowing because forum discussion of software updates can read like recall activity when it is not.
Checked September 2026UK/EUUK register only, checked September 2026; says nothing about Australian recall activity
When an Australian owner could not get his concern taken seriously through the dealer, he lodged it with the federal infrastructure department's vehicle safety issue channel as well as with MG Australia through the app. That route exists independently of the manufacturer and does not require the dealer to agree there is a problem. If you believe you have a genuine safety issue and are being told it is normal operation, this is the escalation path, and reports feed the data that recall decisions are eventually made from.
Aug 2024AUAustralian reporting channel; applies to any vehicle, not only the MG4 all variants
Owners have been called in by their dealer for a service campaign that updates the lane keep assist, and in at least one case the same campaign was applied a second time with further refinement. Owners who had it done report fewer false lane-keep interventions and better lane centring afterwards. If your lane keep assist feels twitchy or intervenes when it should not, it is worth asking the dealer whether there is an outstanding lane keep or driver-assist campaign for your car rather than assuming the behaviour is final. Updates like this are applied at the dealer, not over the air.
2026GeneralSC077Dealer-applied lane keep / driver-assist campaign; market and coverage to be confirmed by VIN all variants