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Service bulletins for the 2021 BMW M440i

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.

124 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

Bulletins, newest first
B6404222024-03-02. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. An interference noise (groaning noise) can be heard from within the heating and air-conditioning unit in thecenter of the instrument panel. The groaning noise always occurs when either a ventilation flap, air stratification flap or the recirculated airflap moves to a different position. Due to the complex design of the heating and air-conditioning unit, the kinematics causing it (top or bottom,left or right) may not be able to be precisely located. Depending on the vehicle model, the number of servomotors (and the associated kinematics unit) varies.Various models use either 2 or 3 servomotors.
B5109232023-06-26. Service bulletin. VISIBILITY:POWER WINDOW DEVICES AND CONTROLS. Sudden failure of the power window(s).
B5404222023-01-03. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. It is possible that the guide stem (aka rotational axis) on the wind deflector can break upon removal and/or during installation.
B6112222022-12-12. Service bulletin. VISIBILITY. After opening the vehicle with the radio remote control and changing the profile, the exterior mirror settings are lost.
B6404222022-10-31. 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.
B6106152021-05-24. Service bulletin. VISIBILITY:WINDSHIELD WIPER/WASHER; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. Washer Fluid Reservoir Rattles While Driving on Rough Roads: Rattling noises heard from vicinity of glove box.
B5106212021-04-26. 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.