Service bulletins for the 2020 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.
48 on file from NHTSA, as of 2026-10-19.
By type
By component
Only bulletins with component: Glass, wipers and mirrors are shown. Show all
| B640422 | 2022-10-31. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. An interference noise (groaning noise) can be heard from within the heating and air-conditioning unit in the center of the instrument panel. |
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| B612315 | 2020-12-21. Service bulletin. VISIBILITY:WINDSHIELD WIPER/WASHER; EQUIPMENT. Low Washer Fluid Warning Light is illuminated when the Washer Fluid Tank is Full: Low Washer Fluid Warning Light is illuminated when the Washer Fluid Tank is Full.There are no faults stored in the system for the washer fluid level switch. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.