What does code P0302 mean on a BMW and is it safe to drive?
P0302: Cylinder 2 Misfire Detected. Here's what it means on your BMW, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
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What this code means
The PCM has detected a misfire on cylinder 2. Same logic as P0301, but for a different cylinder.
Common causes for your BMW
- Worn or fouled spark plug on cylinder 2
- Failing ignition coil
- Leaking or clogged fuel injector
- Low compression on cylinder 2
Symptoms
- Check Engine Light
- Noticeable shaking, especially at idle
- Loss of power or hesitation
Typical fixes
- Replace spark plug/coil on cylinder 2
- Clean or replace injector
- Address internal engine problems if compression is low
Repair cost range
For a BMW, repairs for P0302 often fall between $150 and $900, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on BMW
BMW N54 P0302 frequently indicates an injector issue on cylinder 2 rather than a coil failure. The N54's high-pressure piezo injectors can develop a spray pattern fault or internal leak. Test with BMW's contribution cylinder balance test via ISTA before replacing.
Most commonly affected models
335i N54 2007–2013128i N52 2008–2013X5 N52 2007–2010