IsItAGoodCar
Reliability Guide

Common Problems with the
2015–2020 BMW M3

We've identified 2 known issues that can affect the 2015–2020 BMW M3. 1 of these are serious faults that could be expensive to repair.

2
Known Issues
1
Serious
1
Moderate
0
Minor

All Known Issues

Crank Hub Slip / Timing Risk

SeriousEngine

Highly publicised on tuned S55 cars, crank-hub slip can throw engine timing out and destroy the valvetrain. Stock cars are less vulnerable, but mapped examples deserve extra caution.

Est. Repair Cost: £2,000–£8,000

Coolant Loss / Charge Cooling Leaks

ModerateCooling System

Turbo M3s can develop small coolant leaks around expansion tanks, auxiliary coolers, or charge-cooling hardware. They are often minor at first, but repeated top-ups are not normal.

Est. Repair Cost: £150–£900

Buying Tips for 2015–2020 BMW M3

  • ✓On E46 and E90/E92 models, demand proof that the rod bearings have been replaced; failure to do so will result in a destroyed engine.
  • ✓On the F80 generation (S55 engine), check if the crank hub has been upgraded or pinned, especially if the car has an aftermarket tune.
  • ✓Inspect the boot floor on E46 models for the notorious subframe mounting cracks; this is a guaranteed failure point requiring structural welding.
  • ✓Check the electronic damper control (EDC) suspension for leaks; replacement M-specific shock absorbers are eye-wateringly expensive.
  • ✓Verify the 1,200-mile running-in service was completed precisely on time, as BMW can deny warranty or goodwill claims if it was missed.
  • ✓Examine the carbon fibre roof (if fitted) for peeling clear coat or stone chips, as repairs require specialist carbon fiber work.
20142021
Check a 2015–2020 BMW M3 by Registration