WenmarOpen by Wenmar Pro

Service bulletins for the 2021 BMW M4

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.

72 on file from NHTSA, as of 2026-10-19.

By type

By component

Only bulletins with component: Driver assistance are shown. Show all

Bulletins, newest first
B8414222023-05-01. Service bulletin. LANE DEPARTURE:LANE KEEP:NAVIGATION SYSTEM/SOFTWARE; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). Customer is shown an incorrect GPS location in the vehicle (i.e., Nav Map, coordinates).
B6520222022-12-19. Service bulletin. LANE DEPARTURE; AIR BAGS; ELECTRICAL SYSTEM. A check control message for the restraint system appears. In the instrument cluster, the red air bag warning light lights up permanently. One of the following fault codes is stored in the ACSM (air bag control unit): 930949 - Knee airbag, driver: short circuit to negative terminal 93094F - Knee airbag, front passenger: short circuit to negative terminal 93094C - Knee airbag driver's side: Resistance too great 930952 - Knee airbag, front passenger: Resistance too great.
B0903212022-06-21. Service bulletin. BACK OVER PREVENTION:SOFTWARE. In some rare cases a customer vehicle might be excluded from one or more Remote Software Upgrade(RSU) campaigns. This SIB gives an overview how to identify these vehicles and how to proceed in case of a customer complaint.
B5110212021-07-19. Service bulletin. BACK OVER PREVENTION; STRUCTURE:BODY:TRUNK LID. SERVICE ACTION: CHECK BADGE ON TAILGATE, REPLACE IF NECESSARY . The "BMW" trunklid emblem (arrow) which contains the rear-view camera may not have been correctly fastened during vehicle production. It is possible that the emblem & camera may become detached from the vehicle, such as when going through an automated car wash.
B5110212021-07-06. Service bulletin. BACK OVER PREVENTION. SERVICE ACTION: CHECK BADGE ON TAILGATE, REPLACE IF NECESSARY . The "BMW" trunklid emblem (arrow) which contains the rear-view camera may not have been correctly fastened during vehicle production. It is possible that the emblem & camera may become detached from the vehicle, such as when going through an automated car wash.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.