Service bulletins for the 2021 BMW 230i
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.
40 on file from NHTSA, as of 2026-10-19.
By type
By component
Only bulletins with component: Brakes are shown. Show all
| B510921 | 2021-07-06. Service bulletin. ELECTRICAL SYSTEM; BACK OVER PREVENTION; VISIBILITY; SERVICE BRAKES, HYDRAULIC. GROANING FROM THE SIDE WINDOWS: There is a groaning noise present from the area where the side windows meet the convertible top while driving. Insufficient seal pressure against the side windows. |
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| B360121 | 2021-05-24. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; SERVICE BRAKES, AIR:DISC. Diagnosis of Compound Brake System Complaints in M Vehicles: 1. Visible cracks are caused by high thermal stresses during rapid heating and cooling of the brake discs. Braking from high speed with cold brake components (less than 212 degrees F) increases the likelihood of cracks to form. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.