EngineHigh
Timing chain and turbo actuator faults on diesels
Timing chain, tensioner & guides£900–£2,400
Inspect · Cold start and check for boost hesitation on the road
2018–2025 BMW X4 · common fault repair costs
What the known faults on this BMW X4 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
- £900–£2,400
- Top three risks, from
- £1,270
- Worst case, everything
- £5,100
The single priciest documented job on the 2018–2025 BMW X4 is timing chain, tensioner & guides at £900–£2,400. Few cars need every repair listed here · treat £1,450–£5,100 as the full exposure if one arrived with all of them.
Cost per fault
SuspensionMedium
Front control arm bush knock over broken surfaces
Suspension refresh (per axle)£250–£1,100
Inspect · Drive a rough road and listen for a knock at low speed
ElectricalMedium
iDrive and driver assistance camera calibration faults
Electrical diagnosis & module repair£120–£900
Inspect · Test lane assist, cameras and parking sensors
TyresMedium
Uneven wear from run flats and wide rear rubber
Tyres & alignment£180–£700
Inspect · Measure tread inner and outer on all four corners
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 X4 this week?
Build a tickable checklist for the exact car in front of you, record faults with photos, and hand the buyer a report.