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Ignition coils play a vital role in the performance, efficiency, and health of your BMW S54 engine. Each cylinder gets its own ignition coil for optimum efficiency (no more spark plug wires) and it fires at precisely the right time to ensure a complete burn of the fuel/air mixture. A bad coil will result in misfires, rough running, stumbling, poor fuel economy, and other engine issues. Also, unburnt fuel will also damage catalytic converters and O2 sensors. Diagnosis of misfires and rough running almost always starts with the ignition coils. You can usually isolate faulty coils by moving them to different cylinder banks. However, we always recommend replacing coils in complete sets to eliminate the damage to computers, control modules, and other electrical systems from a voltage spike.
Price listed is per coil. This part number includes the rubber connector boot. This coil is produced by Bosch, the original supplier to BMW for this ignition coil and many other ignition and others parts for your car. It has a two year warranty. This ignition coil has been revised by BMW several times and is sometimes referenced by multiple different part numbers. This coil is the latest version from and may be used to replace an of the following ignition coil part numbers: 12131712219, 12130148594, 12130390064, 12137594938, 12137551049, 12137562744, 12137571643, 12138647689.
S54 E46 M3, MZ3, Z4M note: BMW has changed their preference on S54 ignition coils, now recommending a Delphi brand over this Bosch 12137594937 part number (as of August, 2018). We have used both and feel that one is not any better than the other. If buying a full set you should buy the latest BMW recommendation, Delphi (see link below).
BMW Fitments:
3 Series E46 (01-06) > M3 Z Series E36/7 E36/8 (01-02) > MZ3 Z Series E85 / E86 (06-08) > Z4M
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$26.99
Ignition Coil, OEM Bosch - E46 M3, MZ3 S54, Z4M
Replace your old and failing coils to optimize the health and performance of your engine
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