What does code P0351 mean on a BMW and is it safe to drive?
P0351: Ignition Coil A Primary/Secondary Circuit Malfunction. Here's what it means on your BMW, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
What this code means
The PCM detected a fault in the primary or secondary circuit of ignition coil A (cylinder 1 coil on most coil-on-plug systems). This will cause a misfire on the affected cylinder and can damage the catalytic converter if left unresolved.
Common causes for your BMW
- Failed ignition coil
- Fouled or worn spark plug on that cylinder
- Damaged ignition coil wiring or connector
- Faulty PCM output driver (rare)
Symptoms
- Check Engine Light on, often flashing
- Rough idle and misfire
- Loss of power
- Poor fuel economy
Typical fixes
- Replace ignition coil for cylinder 1
- Replace spark plug on affected cylinder
- Inspect coil wiring and connector
Repair cost range
For a BMW, repairs for P0351 often fall between $80 and $300, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on BMW
BMW N52 and N54 P0351 is almost always a failed high-voltage ignition coil. On the N54 twin-turbo, a fuel injector failure can accompany the coil failure—check injector balance rates if a new coil does not eliminate the misfire.
Most commonly affected models