Service bulletins for the 2021 BMW 840i
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.
125 on file from NHTSA, as of 2026-10-19.
By type
By component
Only bulletins with component: Sunroof are shown. Show all
| B540521 | 2023-09-25. Service bulletin. STRUCTURE:BODY:ROOF AND PILLARS; VISIBILITY:SUN/MOON ROOF ASSEMBLY. ?The sunroof will not operate in either direction. |
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| B540122 | 2022-05-16. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. When locking the vehicle using the remote, the rear roof sunblind closes. It will re-open when unlocking the vehicle. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.