What MG's warranty covers, what Australian law gives you on top of it, and what to do when a repair is refused.
Two different things protect you and they are easy to confuse. MG's warranty is a promise from the manufacturer. The consumer guarantees in the Australian Consumer Law are rights you have by statute, and a warranty cannot take them away.
Scope. Australian consumer law applies to cars bought in Australia.
Where a car dispute goes depends on where you bought it. Three of the eight send you to a court, not a tribunal, so do not assume your state has a tribunal for this. Most of these bodies can only hear a claim against a business, so a car bought from a private seller is usually outside them.
| State | Body that hears it | Regulator to go through first | Worth knowing |
|---|---|---|---|
| NSW | NCAT | NSW Fair Trading | Has a dedicated motor vehicles case type. The claim must be against a business, not a private seller. |
| VIC | VCAT | Consumer Affairs Vic | No motor vehicle list: a faulty car is heard in the Civil Claims List as a goods and services dispute. |
| QLD | QCAT | Office of Fair Trading | Has a motor vehicle dispute jurisdiction. It cannot hear private sales; the purchase must be from a licensed dealer. |
| ACT | ACAT | Access Canberra | Heard as an ordinary civil dispute. ACAT's civil limit is $25,000, which a new MG4 exceeds. Access Canberra needs proof you have written to the business before it will help. |
| WA | Magistrates Court WA | Consumer Protection WA | Not the State Administrative Tribunal. Consumer Protection sends car claims to the Magistrates Court. |
| SA | Magistrates Court SA | CBS SA | Not SACAT, which lists no consumer goods or motor vehicle matters. CBS can call a conciliation conference the trader must attend. |
| TAS | Magistrates Court Tas (Civil) | CBOS Tas | Not TASCAT, despite its stream named Civil and Consumer: that stream cannot receive a consumer dispute. |
| NT | NTCAT | NT Consumer Affairs | Hears small claims up to $25,000. From $25,001 to $250,000 the claim goes to the Local Court, which is where a refund on a new car usually lands. |
Names, limits and processes change. Check it before you file anything.
This is general information, not legal advice. None of the bodies above gives legal advice either, and their own pages say so.
109 reports · 28 safety-related
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
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
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
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
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
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 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 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
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
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
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
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
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 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
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
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
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
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 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
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
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
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
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
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
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
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
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
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
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)
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
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
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
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
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
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
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
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
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
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
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
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
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 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
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
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 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
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
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
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
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
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
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
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
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 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
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
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
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
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
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
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
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
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
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
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
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)
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
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
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
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 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
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
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
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
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
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
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
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
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
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
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
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 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
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
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
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
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
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
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
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
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
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
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 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
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
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)
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
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
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
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
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
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