2015 BMW P0306: What It Means & Is It Safe to Drive?
P0306 on the 2015 BMW: Cylinder 6 Misfire Detected. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
What this code means
Misfire on cylinder 6, found on V6 and V8 engines. On transversely-mounted V6 engines the rear bank cylinders (including cylinder 6) often have higher labor costs due to access difficulty.
Common causes on the 2015 BMW
- Worn spark plug on cylinder 6
- Failed coil-on-plug
- Fuel injector fault
- Low compression
Symptoms
- Check Engine Light, may flash under load
- Rough idle or vibration
- Hesitation and power loss
Typical fixes
- Replace spark plug and COP coil on cylinder 6
- Replace or clean injector on cylinder 6
- Compression and leak-down test if no improvement
Repair cost range
For a 2015 BMW, repairs for P0306 typically fall between $150 and $1200, depending on the root cause and labor rates in your area.
Known issues on BMW
BMW N54 P0306 on cylinder 6 (rear of engine) is frequently an injector failure. Rear injectors are more prone to heat-related failure. A contribution test via ISTA confirms injector vs. coil. Injector coding to the DME is required after replacement.
Most commonly affected models