BatteryHigh
State of health variation on rapid charged cars
HV battery module work£1,200–£8,000
Inspect · Check the vehicle battery health readout and charging history
2021–2025 BMW i4 · common fault repair costs
What the known faults on this BMW i4 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
- £1,570
- Worst case, everything
- £14,450
The single priciest documented job on the 2021–2025 BMW i4 is hv battery module work at £1,200–£8,000. Few cars need every repair listed here · treat £2,460–£14,450 as the full exposure if one arrived with all of them.
Cost per fault
SoftwareLow
Infotainment and over the air update faults
Infotainment repair or software fix£120–£1,200
Inspect · Confirm software is current and screens respond
SuspensionMedium
Bush and damper wear from kerb weight
Suspension refresh (per axle)£250–£1,100
Inspect · Listen for knocks and check for damper weeping
Exterior BodyMedium
Charge port flap fails to open or lock shut due to a faulty locking actuator.
Suspension refresh (per axle)£250–£1,100
Inspect · Lock and unlock the vehicle using the key fob, then press the charge flap to ensure it springs open smoothly and latches securely when pushed closed.
HVAC SystemHigh
Lack of cabin heating or cooling due to heat pump changeover valve failure.
Air-con regas or compressor£90–£900
Inspect · Set the climate control to maximum heat, then maximum cold. Verify a rapid and distinct temperature change at the centre vents within 60 seconds.
BrakesMedium
Corroded discs from regen braking use
Brakes (discs, pads, caliper)£200–£800
Inspect · Inspect disc faces for pitting and scale
Cooling SystemHigh
High-voltage system coolant leaks at the heat exchanger or Combined Charging Unit (CCU).
Cooling component replacement£220–£750
Inspect · Open the bonnet, remove the plastic acoustic cover, and visually inspect the two coolant expansion tanks for correct fluid levels and any dried white crusting around the hoses.
Doors and WindowsMedium
Frameless window glass fails to drop slightly when pulling the door handle, snagging the roof trim.
Door / window mechanism£130–£600
Inspect · Open and close all four doors rapidly. Watch the top edge of the glass to ensure it drops 5mm instantly upon pulling the handle and raises fully when shut.
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 BMW i4 this week?
Build a tickable checklist for the exact car in front of you, record faults with photos, and hand the buyer a report.