BatteryHigh
State of health variation on rapid charged cars
- Typically appears
- 30,000+ miles
- What to inspect
- Get a battery health readout before purchase
- Typical repair
- HV battery module work · £1,200–£8,000
Is the 2022–2025 MG MG4 reliable?
Scored from 8 documented faults · reviewed by the VehicleFaults Research Team
Quick answer
5.2/ 10
MixedOn our documented-fault scoring the MG MG4 rates 5.2 out of 10 · mixed. We hold 8 known faults for it and 2 are rated high severity, so the risk is real but contained. The weak points cluster around battery, software and brakes. A well-serviced example with evidence for the big-ticket items is usually a safe buy; the score describes the model, not the specific car in front of you.
Verdict · Negotiate · budget for the known faults
What the score is built from
- Critical
- 0
- High
- 2
- Medium
- 4
- Low
- 2
Weak points cluster around battery, software, brakes, interior.
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Build the inspection planThe faults that decide it
ElectricalHigh
Charging port locking pin actuator failure, preventing charge initiation or trapping the charging cable.
- Typically appears
- 12-24 months
- What to inspect
- Plug in a dummy Type 2 cable, lock the car to engage the pin, and gently tug the cable to ensure the actuator holds and releases correctly.
- Typical repair
- Charging / power electronics repair · £600–£2,600
SoftwareMedium
Infotainment and driver assist software faults
- Typically appears
- Age-related
- What to inspect
- Confirm software updates have been applied
- Typical repair
- Infotainment repair or software fix · £120–£1,200
BrakesMedium
Disc corrosion from regen braking
- Typically appears
- 20,000+ miles
- What to inspect
- Inspect disc faces for pitting
- Typical repair
- Brakes (discs, pads, caliper) · £200–£800
DrivetrainMedium
Oil misting or dripping from the rear motor reduction gear casing due to breather or seal issues.
- Typically appears
- 10,000-30,000 miles
- What to inspect
- Look under the rear of the vehicle with a torch at the reduction gear casing for signs of oil weeping or fresh drips on the undertray.
- Typical repair
- Water-ingress trace & seal · £150–£800
Costs are indicative UK independent-garage bands for budgeting and negotiation · never a quote.
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