What this usually means
BMW 1/2-Series misfires are usually coils, plugs, injector, PCV or intake leak before engine failure. Ask for ISTA cylinder misfire data and swap-test proof.
What to ask the workshop before approving repair
- • Show the diagnostic fault codes.
- • Show photo/video proof of the failed part.
- • Give an itemised quote for parts and labour.
- • Explain why cheaper common fixes were ruled out.
- • Use/confirm: ISTA
- • Use/confirm: Smoke tester
This is not a final diagnosis. It is a money-saving checklist before you go workshop.