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Service bulletin B720417

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 id10230738
Published by NHTSA2023-01-30
Manufacturer's numberB720417
Manufacturer's date2022-12-01
NHTSA componentSEATS

NHTSA's summary

Acoustic and visual warnings indicate that the front passenger seat is occupied, and the safety belt is not fastened when the seat is actually unoccupied. If the situation is currently present, sit in the seat and move the seat to a slightly different position. The POL (Passenger Occupancy Light) light should now function correctly. In some cases, the air bag Warning Light was illuminated. Advanced Crash Safety Module (ACSM) fault "930A1C - Front passenger seat occupancy detection transmitting fault (moisture)" is stored.

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

Seats

Vehicles listed
BMW M52018, 2019, 2020, 2021, 2022

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
B5201212023-09-25. Service bulletin. ?The front seat will not calibrate/initialize, and the stored faults cannot be deleted.
B5201212021-08-09. Service bulletin. Front seat will not calibrate/initialize, and the stored faults cannot be deleted
B5201212021-03-15. Service bulletin. SEAT FAILS TO INITIALIZE DUE TO MISSING END STOP: Front seat will not calibrate/initialize.
B6521202021-02-01. Service bulletin. ?NO PREVIEW IMAGES DISPLAYED IN THE REAR SEAT ENTERTAINMENT: The rear seat entertainment screens do not display any preview images at times.
B5205182018-10-09. Service bulletin. SEAT MEMORY SWITCH SPORADICALLY NOT FUNCTIONING: Selecting one of the saved seat positions (via the memory seat position switch on the door panel), fails to work.