Service bulletins for the 2021 BMW M550i
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.
165 on file from NHTSA, as of 2026-10-19.
By type
By component
Only bulletins with component: Heating and air conditioning are shown. Show all
| B640821 | 2023-07-24. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. The air conditioning cycles from cold to warm air while driving or while at a stand still. The vent outlet temperatures vary by 25 degrees Fahrenheit or more (38 F to 60 F +) without changing any climate control settings. |
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| SIB640821 | 2022-08-22. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. The air conditioning cycles from cold to warm air while driving or while at a stand still. The vent outlet temperatures vary by 25 degrees Fahrenheit or more (38 F to 60 F +) without changing any climate control settings. In some cases the air conditioning may have stopped blowing cold air altogether. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.