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Service bulletin 121814

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10149348
Published by NHTSA2018-11-26
Manufacturer's number121814
Manufacturer's date2014-10-01
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

Engine Misfire Due to Failed Ignition Coil. The Check Engine or Service Engine Soon (MIL) lamp is on with misfire fault(s) stored in the DME. Intermittent performance or rough running without a relevant DME fault stored The most likely cause is that an ignition coil has failed, which can be confirmed in many cases with basic diagnosis. During operation with high temperature fluctuations, the different materials used in the ignition coil construction can deteriorate over time, leading to a failure.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system

Vehicles listed
BMW K SERIES

Listing a model year does not mean every vehicle of it is concerned: the document says which.