Service bulletins for the 2021 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.
72 on file from NHTSA, as of 2026-10-19.
By type
By component
Only bulletins with component: Power windows are shown. Show all
| B510923 | 2023-06-26. Service bulletin. VISIBILITY:POWER WINDOW DEVICES AND CONTROLS. Sudden failure of the power window(s). |
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| B510621 | 2021-04-26. Service bulletin. VISIBILITY:POWER WINDOW DEVICES AND CONTROLS. STREAKS ON FRONT SIDE WINDOWS: Streak marks are visible, most commonly on the upper rear corner of the front side window. The marks can be present anywhere on the rearmost edge of either front window. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.