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Service bulletins for the 2018 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.

135 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
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.
B5133162021-08-09. Service bulletin. STRUCTURE:BODY; STRUCTURE:FRAME AND MEMBERS; SEATS. Water sloshing noises coming from the rear passenger compartment (left or right) while driving Water ingress in the luggage compartment, or in the rear passenger compartment- rear seat bench rear passenger compartment foot well rear passenger compartment side panel Failure of various control units installed in the area of the water removal channel
B5133162019-08-19. Service bulletin. SEATS:MID/REAR ASSEMBLY; STRUCTURE:BODY. LOSHING NOISES/WATER IN REAR PASSENGER COMPARTMENT: This Service Information bulletin replaces SI B51 33 16 dated August 2016.
B5209192019-07-22. Service bulletin. SEATS. CRACKING NOISE FROM SEAT BACKREST. Groaning/Cracking noises are heard from the front seat backrest when the vehicle is cornering.
B5203182018-10-09. Service bulletin. SEATS. MEMORY SEAT ADJUSTMENT IS LIMITED: After programming the vehicle with ISTA 4.10.2x, the adjustment range of the memory seat may restricted.

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