2008 BMW P0302: What It Means & Is It Safe to Drive?
P0302 on the 2008 BMW: Cylinder 2 Misfire Detected. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe 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 on the 2008 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 2008 BMW, repairs for P0302 typically fall between $150 and $900, depending on the root cause and labor rates in your area.
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