BatteryCritical
Capacity differences between 60Ah, 94Ah and 120Ah cars
Major mechanical repair£800–£2,500
Inspect · Confirm the battery version and run a state-of-health check
2013–2022 BMW i3 · common fault repair costs
What the known faults on this BMW i3 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
- £800–£2,500
- Top three risks, from
- £1,450
- Worst case, everything
- £11,200
The single priciest documented job on the 2013–2022 BMW i3 is major mechanical repair at £800–£2,500. Few cars need every repair listed here · treat £2,740–£11,200 as the full exposure if one arrived with all of them.
Cost per fault
BodyHigh
Carbon body repair complexity after accident damage
Body & corrosion repair£250–£1,800
Inspect · Check the history for accident repairs and inspect panel gaps
EngineHigh
Range extender fuel system faults from lack of use
Fuel pump / fuel system£400–£1,500
Inspect · On REx cars, start the generator and check it runs cleanly
DrivetrainHigh
Rear end clunking under acceleration or regen braking due to sheared plastic motor mount brackets (primarily pre-2016 models).
Significant repair£400–£1,400
Inspect · Accelerate sharply to 15 mph and lift off abruptly to trigger heavy regen braking. Listen for a loud metallic clunk from the rear axle.
SuspensionMedium
Narrow tyre availability and rear bush wear
Suspension refresh (per axle)£250–£1,100
Inspect · Check tyre condition and source availability before pricing
Front SuspensionLow
Creaking or knocking noises when steering, caused by perished top strut mounts and split shock absorber dust boots.
Suspension refresh (per axle)£250–£1,100
Inspect · Turn the steering wheel lock-to-lock while stationary to listen for creaks. Shine a torch into the front arches to check for torn rubber damper boots.
HVAC / Battery CoolingHigh
AC compressor failure, which can send metal swarf into the high-voltage battery cooling loop, causing catastrophic battery damage.
Air-con regas or compressor£90–£900
Inspect · Set climate control to 'Lo' with max fan. Listen at the front bumper for loud mechanical whining and ensure vents blow ice-cold air within 60 seconds.
ElectricalMedium
Spurious 'Drivetrain Malfunction' errors, locked charging cables, or complete vehicle immobilisation due to a degraded 12V battery.
EGR valve / cooler replacement£300–£900
Inspect · Open the bonnet, unclip the plastic storage tub, and check the date stamp on the 12V battery. If older than four years, budget for replacement.
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 i3 this week?
Build a tickable checklist for the exact car in front of you, record faults with photos, and hand the buyer a report.