Service bulletins for the 2021 BMW M850i
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.
128 on file from NHTSA, as of 2026-10-19.
By type
By component
| B330120 | 2020-10-19. Service bulletin. SUSPENSION. REAR AXLE SHUDDER AT SLOW SPEEDS: There is a shudder or jerking feeling coming from the rear of the vehicle at low speeds and low engine loads while turning Incorrect actuating pressure in the M-differential clutch plates. |
|---|---|
| B320420 | 2020-10-19. Service bulletin. STEERING. GROANING NOISE DURING HEIGHT ADJUSTMENT OF THE ELECTRIC STEERING COLUMN: A groaning type noise is heard during the height adjustment. |
| B320320 | 2020-10-19. Service bulletin. STEERING. FAILURE OF THE ELECTRIC STEERING COLUMN ADJUSTMENT AT HIGHER CABIN TEMPERATURE: Electric steering column adjustment fails when interior cabin temperatures rise above 122 degrees F (e.g., parked outdoors on hot day). Faulty self-diagnosis of the steering column control unit. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.