Use to test for Spark.
Use to test for Spark.
Misfires and rough running often come down to worn coils and plugs.
10X Entries Into Our F80 M3 Sweepstakes
This product was last offered at the strikethrough price on
10-28-2026
Plug-and-play kit adapts B58 coils onto N55 for stronger spark.
The Mishimoto BMW 550i Ignition Coil is a high-quality replacement designed to restore the factory performance and fuel efficiency of your 4.4L V8 engine.
Designed to restore factory-level performance and fuel efficiency to a wide range of BMW models.
Regain power loss & fuel economy from worn or failed ignition coils!
Regain power loss & fuel economy from worn or failed ignition coils!
Regain power loss & fuel economy from worn or failed ignition coils!
Regain power loss & fuel economy from worn or failed ignition coils!
Restore smooth engine operation with new ignition coils
Everything you need to upgrade your N55 with B58 high-performance ignition coils!
Modified core windings offer increased spark for a faster and more efficient burn.
5X Entries Into Our F80 M3 Sweepstakes
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