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Service bulletins for the 2018 BMW 540i

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.

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

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Only bulletins with component: Air bags are shown. Show all

Bulletins, newest first
B7201252025-11-03. Warranty extension. AIR BAGS; ELECTRICAL SYSTEM. A situation may occur where the front passenger seat is not occupied; however, a “fasten seat belt” warning and a front passenger seat air bag deactivation message appears. 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, and the following Advanced Crash Safety Module (ACSM) fault is stored: 930A1C - Front passenger seat occupancy detection transmitting fault (moisture)
B7201252025-04-18. Warranty extension. ELECTRICAL SYSTEM; AIR BAGS. The Supplemental Restraint Systems (SRS) Front Passenger’s Seat Occupancy Capacitive Interior Sensor (CIS) Mat for defects in materials and/or workmanship that causes a false seat occupancy alert to occur has been extended to 10 years / 120,000 miles as determined from the vehicle's original in-service / first delivery date.
B6504142022-12-12. Service bulletin. LANE DEPARTURE; UNKNOWN OR OTHER; AIR BAGS; SEATS:BARRIERS; BACK OVER PREVENTION. According to the customer, the airbag warning light was on, but it may not be illuminated when the vehicle arrives in the workshop. 1. ACSM fault code "930A60 - Seat occupancy detection, front passenger; malfunction" is stored. The fault may or may not currently be present. Or 2. ACSM fault code "930A1C - Front passenger seat occupancy detection transmitting fault(moisture)" is stored. The fault may or may not currently be present.
B6302212021-04-26. Service bulletin. EXTERIOR LIGHTING; AIR BAGS. REAR LIGHT FAULTY CHECK CONTROL MESSAGE: The CID displays "Left brake light faulty.
B0112192020-06-15. Service bulletin. AIR BAGS; ELECTRICAL SYSTEM; STEERING. FRONT GRILLE UPPER/LOWER ACTIVE AIR FLAPS - LTD WTY EXT TO 15 YEARS/150000: A check engine light or check control message is present for the active air flaps behind the kidney grilles. The potential component-related causes of these faults are a: 1. Mechanical issue with the linkage of the upper or lower active air flap; and/or an 2. Internal short circuit of the adjustment motor.
B6505202020-04-20. Service bulletin. FORWARD COLLISION AVOIDANCE; LANE DEPARTURE; AIR BAGS. FAULT 930C1E IS FOUND IN THE ACSM: Vehicle comes into the workshop with the following illuminated: Check Engine Light DSC warning lamp Air bag warning lamps During diagnosis the following fault code is found stored in the ASCM (Advanced Crash Safety Module): 930C1E internal ECU error If the fault is cleared it returns immediately. The root cause is under investigation.
B6304182020-04-20. Service bulletin. AIR BAGS; EXTERIOR LIGHTING; ELECTRICAL SYSTEM. DAYTIME RUNNING LIGHT IS DIM OR DISCOLORED: This Service Information Bulletin (Revision 2) replaces SI B63 04 18 dated January 2019. One or more of the LED daytime running lights are dim or discolored. The connection between the LED module and light tube inside the headlight is damaged.
B5130162020-04-20. Service bulletin. AIR BAGS; PARKING BRAKE. TAILGATE UNINTENTIONALLY OPENS: This Service Information Bulletin (Revision 4) replaces SI B51 30 16 dated March 2018. Trunk/tailgate may open when vehicle is locked Trunk/tailgate may open while the vehicle is in motion usually after stopping such as a traffic light etc. Vehicle key trunk/tailgate button may be accidentally pressed thus opening the tailgate.
B6505202020-02-18. Service bulletin. AIR BAGS; ELECTRICAL SYSTEM:SOFTWARE. FAULT 930C1E IS FOUND IN THE ACSM: Vehicle comes into the workshop with the following illuminated: Check Engine Light DSC warning lamp Air bag warning lamps During diagnosis the following fault code is found stored in the ASCM (Advanced Crash Safety Module): 930C1E internal ECU error If the fault is cleared it returns immediately. The root cause is under investigation.

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