BeforeYouBuyAuto

Free used car buyer guide / EH32 / 2022-2025

MG 4 common problems and best years

By BYBA Research - how we score cars

Updated 2026-06-12

BYBA Buy Score

7.7/10

Buy with checks

1 walk-away risk, 7 minor faults documented for this generation, weighted by severity and repair cost. Biggest factor: rear electric-drive transmission oil leak. Score methodology.

The MG4 is the budget EV that can make sense, but only if you buy it like a warranty-managed appliance rather than a Japanese hatchback. The costly or annoying traps are early reduction-gear oil leaks, sagging rear undertray panels, aggressive lane-keep/driver-assist software, infotainment and telematics bugs that require dealer updates, charging interruptions, and XPower vibration or tyre/brake wear. The safest buy is a 2024-2025 Long Range or Trophy/Luxury with evidence of dealer software updates, no gearbox oil staining, no undertray deformation, and warranty intact through correct MG servicing. Owners should keep service records clean because MG warranty support is the difference between a cheap EV and a frustrating repair negotiation.

Faults covered

8

Highest risk

Rear electric-drive

Best years

2024-2025

Best buys

  • 2024-2025 Long Range with updated driver-assist software and clean underbody.
  • Standard Range LFP car for short commutes where low purchase cost matters more than DC charging.
  • Trophy/Luxury only if app, cameras, heat pump and software behave during the viewing.

Inspect hard

  • 2022-early 2023 cars for reduction-gear oil leakage and breather repair.
  • Rear undertray shape, clips and ground clearance.
  • Lane assist, ACC, infotainment, app and charging behavior after software updates.

Avoid

  • Cars with visible gearbox oil leak and no MG repair approval.
  • XPower with unresolved vibration or mismatched tyres.
  • Any car missing services that could jeopardise the MG warranty.

Next checks

Before you contact the seller

Check the car's history first. Then bring the right tools if it still looks worth viewing.

Primary next step

Check history, title, and recall status

The faults above matter more if the car also has accident history, finance flags, missing service records, or open safety recalls.

carVerticalPaid history report - EU/UK fitVinAuditPaid history report - US fitNHTSA recallsFree recall lookup

Viewing kit

Bring the right tools

Four cheap tools catch most of the faults on this page at a MG 4 viewing.

Bluetooth OBD2 scannerRead fault-code history before trusting a clear dashboard.Paint thickness gaugeSpots resprays and hidden accident repair in seconds.Brake fluid testerHigh moisture means neglected maintenance everywhere else too.LED inspection lightEngine bay, sills, and underbody never lie under real light.

Printable workflow

Take the inspection pack

The PDF is the ordered checklist for the viewing: documents, walk-around, test drive, and scan.

Open PDF option

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Engines and trims

Which MG 4 should you buy?

On most used cars, the engine and trim choice changes the risk more than the mileage does. Narrow this down before you start viewing cars.

51 kWh LFP Standard Range

2022-2025

BEST CHEAP COMMUTER

The LFP pack tolerates regular high state of charge better than NMC packs and suits short daily use. Range is modest, but degradation anxiety is low if the car is home-charged and serviced.

64 kWh NMC Long Range

2022-2025

BEST ALL-ROUND MG4

The 64 kWh car is the sweet spot for most buyers. It has enough range to justify the MG4 over older short-range EVs, but it avoids the extra XPower duty cycle and cost.

77 kWh NMC Extended Range

2023-2025

BUY FOR RANGE, INSPECT SOFTWARE

The big-pack car makes the MG4 more useful outside town, but it is newer and often paired with higher equipment. Verify charging, route planning and software level before paying the premium.

64 kWh XPower dual motor

2023-2025

PERFORMANCE BUY ONLY

XPower is very quick for the money but adds AWD complexity, tyre cost and vibration complaints. It is not the sensible cheap MG4; buy it only after a hard road test.

Year notes

Year-by-year buyer advice

Use this to narrow the search before you spend time travelling to view a car.

2022

European launch year. Early software, lane-assist complaints, gearbox oil leak reports and undertray concerns are most concentrated here.

Buyer: Only buy a 2022 with warranty intact, software updates documented and the underside inspected. Price it below a cleaner later car.

Owner: If you own an early car, get the oil leak and software updates written into the dealer record while warranty support is easy to claim.

2023

MG updates the oil-leak bulletin, expands trims, and XPower/Extended Range arrive in many markets.

Buyer: A 2023 can be good value if built after the worst early issues, but check XPower vibration and software version carefully.

Owner: Dealer software updates are not always OTA. Ask directly at service.

2024

Software maturity improves, lane-assist behavior is less crude on updated cars, and more owner data exists.

Buyer: This is the sensible used target. Still inspect the underside because stock age and registration date do not prove build date.

Owner: Keep the service book perfect. Warranty validity is your protection against MG's weaker dealer consistency.

2025

Late EH32 cars before/facing facelift timing in some markets; equipment and software vary by region.

Buyer: Buy on exact car condition rather than assuming all 2025s are facelift-quality. Confirm software and warranty.

Owner: Document every update and repair. It will help resale because buyers know early MG4 stories.

Common problems

Faults to check before buying

What fails, what it looks like, what it costs, and the quick checks you can do at the viewing - ranked by how badly each one can hurt you.

Fault 1

Rear electric-drive transmission oil leak

WALK AWAY / $$

Affects

Mostly 2022 and early 2023 MG4 single-motor cars, but inspect all.

Symptoms

Oil staining around rear drive unit, oily undertray, burning smell after drive, later gear whine.

Typical repair cost

Warranty if covered; EUR 1,500-4,000+ if reduction gear is damaged outside warranty.

Codes / scan clues

Usually none; physical leak/noise.

Root cause: Early electric drive transmission breather/sealing issue lets oil escape and collect on the rear undertray.

Quick check

  • Inspect rear drive unit and inside undertray with a torch.
  • Ask for SI-TB2022110901 or dealer oil-leak repair paperwork.
  • Road-test for rear whine on throttle and lift-off.
  • Recheck after the drive for fresh oil.

Buyer note

A dry repaired car is fine. A wet drive unit with no MG approval is a walk-away.

Owner note

Photograph oil before the dealer visit and recheck after repair. Cleaning alone is not a fix.

Fault 2

Rear undertray sagging or deformation

LOW / $

Affects

Early MG4 cars; still worth checking on all.

Symptoms

Bulged rear undertray, low-hanging plastic, scraped tray, missing clips.

Typical repair cost

EUR 50-300 for clips/tray work if not goodwill.

Codes / scan clues

None.

Root cause: Large rear aero tray can deform or lose clip support, sometimes made worse by oil contamination or heat.

Quick check

  • View the car from behind at low angle.
  • Check tray clips and scrape marks.
  • Look for oil residue trapped above the tray.
  • Compare ride height and tray clearance side to side.

Buyer note

A sagging tray is not catastrophic, but it is evidence to inspect the drive-unit leak at the same time.

Owner note

Replace broken clips early. A loose tray gets worse at motorway speed.

Fault 3

Over-aggressive lane keep assist and driver-assist software

LOW / $

Affects

Early 2022-2023 software most; updated later cars usually better.

Symptoms

Steering tug, lane assist re-enables, intrusive warnings, driver monitoring false alerts.

Typical repair cost

Dealer software update usually free under warranty.

Codes / scan clues

Usually none; calibration faults possible in camera module.

Root cause: Early calibration of lane support and driver-assist logic was too intrusive for real roads, with updates rolled out unevenly by dealers.

Quick check

  • Drive on a well-marked road and test lane assist behavior.
  • Check software version and dealer update history.
  • Confirm whether settings reset after restart.
  • Inspect windscreen camera area.

Buyer note

Do not buy one without driving it yourself. Some owners tolerate the system; others hate it immediately.

Owner note

Ask the dealer for the latest driver-assist update, not a generic service.

Fault 4

Infotainment, app and telematics glitches

LOW / $

Affects

All years, worse on early software.

Symptoms

Screen freezing, Bluetooth dropouts, app not connecting, traffic/weather unavailable, USB errors.

Typical repair cost

Software free/low cost; module replacement warranty dependent.

Codes / scan clues

Telematics/head-unit communication codes.

Root cause: MG4 software updates are dealer-dependent in many markets, and early cars shipped with immature infotainment and connected-service logic.

Quick check

  • Pair phone, use CarPlay/Android Auto and test Bluetooth call.
  • Open app functions if seller has access.
  • Check navigation traffic and update screen.
  • Ask MG dealer for latest software status by VIN.

Buyer note

A cheap MG4 with bad software may still be fine, but only if the dealer will update it under warranty.

Owner note

Book software updates as a specific job. Do not assume they happen during routine service.

Fault 5

Charging interruption or public fast-charge handshake faults

LOW / $$

Affects

All years; more often reported as software/charger compatibility than battery failure.

Symptoms

Failed public DC sessions, AC charge stops, car status not updating after charge attempt.

Typical repair cost

Software/update free; charge-port or module diagnosis EUR 200-1,000+.

Codes / scan clues

OBC, charge-port lock, pilot/proximity and BMS communication codes.

Root cause: Charge control software, port locking and charger compatibility need to agree. Early MG software is less polished than Hyundai/Kia or Tesla.

Quick check

  • Test AC charging before purchase.
  • If possible, test DC charging at a public charger.
  • Inspect charge pins and port lock.
  • Ask whether any failed sessions were fixed by software.

Buyer note

A car used only at home may hide public charging frustration. Test the charging you will actually use.

Owner note

Keep photos and charger receipts from failed sessions; dealers need evidence.

Fault 6

XPower vibration, tyre and brake load

LOW / $$

Affects

2023-2025 MG4 XPower.

Symptoms

Vibration around 50-70 mph, steering shake, uneven tyre wear, brake judder.

Typical repair cost

EUR 700-1,200 tyres; brake/alignment work varies; warranty if driveline fault confirmed.

Codes / scan clues

Usually none unless AWD/ESC faults present.

Root cause: The XPower adds high torque and AWD to a budget platform. Wheel/tyre balance, alignment and driveline tolerances become much more noticeable.

Quick check

  • Drive at 80-115 km/h on smooth road.
  • Check tyres match by brand, size and load rating.
  • Brake firmly and feel for judder.
  • Ask about wheel balancing attempts.

Buyer note

Do not buy an XPower with unresolved vibration. It may be simple balance, but you need proof before paying.

Owner note

Use quality tyres and document vibration early under warranty.

Fault 7

Door lock, window and minor body electronics faults

LOW / $

Affects

Early cars and cars with weak software/update history.

Symptoms

Door locking oddities, window faults, alarm/lock messages, occasional reports of occupants needing boot exit.

Typical repair cost

Software/update free to EUR 300; modules more if out of warranty.

Codes / scan clues

Body control, door module and window module codes.

Root cause: Body control software and low-cost actuators show early-production weakness; updates fixed some complaints.

Quick check

  • Lock/unlock from key, app and interior switch.
  • Cycle every window.
  • Open every door from inside and outside.
  • Scan body modules.

Buyer note

Minor body glitches are acceptable only when warranty and dealer support are intact.

Owner note

Report lock issues immediately. Intermittent body faults are easier to fix with a recorded pattern.

Fault 8

Warranty risk from missed servicing

LOW / $

Affects

All years, especially privately sold cheap cars.

Symptoms

No stamped MG service, late inspection, seller says EVs need no service, unclear software history.

Typical repair cost

Administrative risk; can turn warranty repairs into EUR 1,000+ owner bills.

Codes / scan clues

None.

Root cause: MG's long warranty is valuable but depends on service compliance and dealer records. Missing services weaken your leverage on known faults.

Quick check

  • Check service dates against MG schedule.
  • Ask MG dealer to confirm warranty status by VIN.
  • Compare mileage and software-update history.
  • Reject vague screenshots as service proof.

Buyer note

On an MG4, warranty history is part of the car's value. Do not treat it as paperwork trivia.

Owner note

Service on time even if the car feels maintenance-free. The stamp protects the expensive bits.

Inspection pack

Printable checklist for the viewing

The free page helps you decide whether the car is worth seeing. The paid guide is the ordered, printable checklist you use at the car.

Documents

  • MG dealer service history with dates, mileage and software updates.
  • Warranty status by VIN.
  • Oil-leak bulletin or drive-unit repair paperwork if early car.
  • Charging, lock, infotainment or ADAS complaint invoices.

Walk around

  • Inspect rear drive unit and undertray for oil.
  • Check rear undertray shape and clips.
  • Inspect tyres, wheels and brake discs.
  • Check charge port pins and lock.

In the car

  • Pair phone, test app/infotainment and camera views.
  • Cycle every door, lock and window.
  • Check driver-assist settings and warnings.

Test drive

  • Test lane assist on a marked road.
  • Drive at motorway speed for vibration.
  • Listen for rear drive-unit whine.

Scan tool

  • Scan BMS, OBC, body, ADAS and drive modules.
  • Save software version if accessible.
  • Check for repeated communication or charge faults.

Bottom line

Buy: Buy a later Long Range or clean Standard Range with warranty intact, dealer software updates done and a dry rear drive unit.

Avoid: Avoid unresolved oil leaks, bad undertray deformation, XPower vibration, and any MG4 whose service gaps could let MG reject warranty support.

Quick answers

MG 4 buyer questions

The short versions of what this page answers in full.

What are the most common MG 4 2022-2025 problems?

The highest-impact documented faults are: Rear electric-drive transmission oil leak; Rear undertray sagging or deformation; Over-aggressive lane keep assist and driver-assist software. This guide covers 8 faults in total, each with symptoms, typical repair costs, and checks you can do at a viewing.

Which MG 4 years are the best to buy?

2024-2025 stand out in this generation. Buy a later Long Range or clean Standard Range with warranty intact, dealer software updates done and a dry rear drive unit.

Which MG 4 should I avoid?

Avoid unresolved oil leaks, bad undertray deformation, XPower vibration, and any MG4 whose service gaps could let MG reject warranty support.

Is the MG 4 2022-2025 a reliable used buy?

BYBA scores it 7.7/10 (buy with checks). 1 walk-away risk, 7 minor faults documented for this generation, weighted by severity and repair cost. Biggest factor: rear electric-drive transmission oil leak.

Get updates when this guide changes

Recalls get added, repair costs shift, and new fault patterns show up in the data. Leave an email and we'll tell you when the MG 4 guide gets a meaningful revision. Nothing else, no selling your address.

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