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Service bulletin B121320

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 id10187474
Published by NHTSA2021-02-22
Manufacturer's numberB121320
Manufacturer's date2021-01-01
NHTSA componentELECTRICAL SYSTEM:IGNITION:COIL; ELECTRICAL SYSTEM; ENGINE

NHTSA's summary

REPLACE ALL THE IGNITION COILS: The ignition coils may not have been produced to specifications which could lead to irregular running of the engine.

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, Engine, Ignition

Vehicles listed
BMW 750I2018, 2019
BMW 750LI2016 to 2019
BMW B7 ALPINA2018 to 2021
BMW M550I2017
BMW M550I2018, 2019, 2020, 2021
BMW M850I2020, 2021
BMW X52019, 2020, 2021
BMW X62021
BMW X6 M2020
BMW X72019, 2020, 2021

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

Other bulletins for the same vehicles and component
B6107222022-05-31. Service bulletin. Check Control message (CCM) displays "Vehicle key missing" after engine start.
B1221192019-07-22. Service bulletin. HIGH ENGINE SPEED IMMEDIATELY AFTER STARTING. In rare circumstances after the engine is started with the Start-Stop button the engine speed may immediately increase to a high constant RPM (approximately 3000 rpm).