BatteryHigh
State of health variation on rapid charged cars
HV battery module work£1,200–£8,000
Inspect · Get a battery health readout before purchase
2022–2025 MG MG4 · common fault repair costs
What the known faults on this MG MG4 typically cost to put right at a UK independent garage · use the figures to price risk before you bid, and to justify a reduction when something shows up on inspection.
Cost at a glance
- Most expensive fault
- £1,200–£8,000
- Top three risks, from
- £2,050
- Worst case, everything
- £17,150
The single priciest documented job on the 2022–2025 MG MG4 is hv battery module work at £1,200–£8,000. Few cars need every repair listed here · treat £3,010–£17,150 as the full exposure if one arrived with all of them.
Cost per fault
ElectricalHigh
Charging port locking pin actuator failure, preventing charge initiation or trapping the charging cable.
Charging / power electronics repair£600–£2,600
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.
BodyworkLow
Tailgate misalignment causing the lower edge to rub against the rear bumper, leading to paint damage.
Body & corrosion repair£250–£1,800
Inspect · Open and close the tailgate, checking the panel gaps along the lower edge and inspecting the top of the rear bumper for paint rub marks.
SteeringMedium
Clunking or knocking noise from the steering column or rack when manoeuvring at low speeds.
Steering rack / column repair£400–£1,500
Inspect · With the vehicle stationary and powered on, rock the steering wheel left and right rapidly to listen for a distinct mechanical knock from the column.
SoftwareMedium
Infotainment and driver assist software faults
Infotainment repair or software fix£120–£1,200
Inspect · Confirm software updates have been applied
BrakesMedium
Disc corrosion from regen braking
Brakes (discs, pads, caliper)£200–£800
Inspect · Inspect disc faces for pitting
DrivetrainMedium
Oil misting or dripping from the rear motor reduction gear casing due to breather or seal issues.
Water-ingress trace & seal£150–£800
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.
InteriorLow
Trim rattles and seat wear
Interior trim repair£90–£450
Inspect · Drive a rough road and inspect the seats
Ranges are indicative parts-and-labour costs at a UK independent garage, inclusive of VAT. Franchised dealers typically sit 40–80% higher, and prestige or electrified variants sit at the top of each band. Always get a written quote before committing.
Inspecting a MG MG4 this week?
Build a tickable checklist for the exact car in front of you, record faults with photos, and hand the buyer a report.