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Service bulletins for the 2021 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.

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

By type

By component

Only bulletins with component: Seats are shown. Show all

Bulletins, newest first
B5201212023-09-25. Service bulletin. SEATS. ?The front seat will not calibrate/initialize, and the stored faults cannot be deleted.
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.
B5206212021-08-09. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; SEATS. The driver's seat and/or passenger seat rattles ("cracking" noise) during load reversal. There is a slight movement in the seat that is most noticeable when moving forwards and backwards.
B5201212021-08-09. Service bulletin. SEATS; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. Front seat will not calibrate/initialize, and the stored faults cannot be deleted
B1103212021-07-06. Service bulletin. SEATS. B58 ENGINE: ENGINE OIL FILTER REMOVAL PROCEDURE AND TOOLS . A. For the B58 engines, a BMW Oil Catch special tool for use in conjunction with removing the engine oilfilter insert is now available.
B5201212021-03-15. Service bulletin. SEATS. SEAT FAILS TO INITIALIZE DUE TO MISSING END STOP: Front seat will not calibrate/initialize.

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