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Service bulletins for the 2021 BMW 840i

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.

125 on file from NHTSA, as of 2026-10-19.

By type

By component

Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
B6511212021-08-09. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT ADAPTIVE/MOBILITY. SiriusXM satellite radio is not working and does not display a channel list.
B6104212021-08-09. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT; ENGINE. The customer may complain of a check control message stating "Safe share detected" (CCM-ID 953). Check control message can be verified by checking key reader information or performing the Check control message history service function.
B6618202021-02-08. Service bulletin. ELECTRICAL SYSTEM. ?GESTURE CONTROL UNINTENDED OPERATION: The Gesture camera inadvertently detects movement and performs unintended operations.
B6624192021-02-01. Service bulletin. ENGINE; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. REMOTE CONTROL IS NOT DETECTED: Vehicle cannot be opened or closed using comfort access, engine start is not possible, and the vehicle may not start when placing the key against the steering column.
B6618202021-02-01. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. ?GESTURE CONTROL UNINTENDED OPERATION: The Gesture camera inadvertently detects movement and performs unintended operations.
B6520202021-02-01. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE. ?PROGRAM HEAD UNIT: Satellite radio content is not available over IP, this does not affect channels received over satellite.
B6203202021-02-01. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. MALFUNCTION INDICATOR LAMP (MIL) IS ILLUMINATED WITH FAULT MEMORY CDC152: The malfunction indicator lamp (MIL) is illuminated in the instrument cluster. The vehicles has no operating failures; only the MIL is illuminated.
B6111202021-02-01. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; STRUCTURE:BODY:DOOR; EQUIPMENT ADAPTIVE/MOBILITY. WHEN LOCKING VEHICLE, DOORS ARE LOCKED BUT VEHICLE IS NOT SECURED: The customer complains that when locking the vehicle from the outside using the remote control: The doors lock The alarm system is not activated The side mirrors (when the function is activated) do not fold in.
B1213202021-02-01. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. REPLACE ALL THE IGNITION COILS: The ignition coils may not have been produced to specifications which could lead to irregular running of the engine. A manufacturing defect affecting the ignition coil insulation.
B0901202021-02-01. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. BMW REMOTE SOFTWARE UPGRADE IS NOT OFFERED FOR INSTALLATION: The customer complaints that the BMW Remote Software Upgrade (RSU) is not possible in their vehicle, though the Remote Software Upgrade menu is available in the vehicle and a download was performed by the vehicle or the BMW Connected App.
B6113192020-12-21. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. CHECKING THE DUAL STORAGE SYSTEM AND REPLACE IF NECESSARY: In the event of an accident, the two-battery Dual Storage System (DSS) is disconnected from the electrical system via an internal relay. In some cases, the relay is stuck closed and a fault is set.
B6111202020-12-21. Service bulletin. LATCHES/LOCKS/LINKAGES; ELECTRICAL SYSTEM. WHEN LOCKING VEHICLE, DOORS ARE LOCKED BUT VEHICLE IS NOT SECURED: The customer complains that when locking the vehicle from the outside using the remote control: The doors lock. The alarm system is not activated. The side mirrors (when the function is activated) do not fold in.
B6607202020-11-23. Service bulletin. ELECTRICAL SYSTEM. SERVICE ACTION - REPLACE LEFT REAR SHORT RANGE RADAR SENSOR (SRR): The functionality of the left rear SRR sensor could be reduced which would display the Driving Assistance Check Control Message.
B6607202020-11-16. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. SERVICE ACTION - REPLACE LEFT REAR SHORT RANGE RADAR SENSOR (SRR): The functionality of the left rear SRR sensor could be reduced which would display the Driving Assistance Check Control Message.
B5208202020-11-16. Service bulletin. ELECTRICAL SYSTEM; SEATS:FRONT ASSEMBLY:HEAD RESTRAINT. CC MESSAGE "FAILURE OF HEAD RESTRAINT ADJUSTMENT ON PASSENGER'S SIDE": Customer states he/she has received a sporadic Check Control message (CCM) "Failure of head restraint adjustment on passenger's side". This is CCM ID-2184. This message appears when the customer folds down the front passenger seat and drives off. The front passenger seat is unoccupied. The CCM (ID-2184)- Appears after 60 seconds States that the head restraint is faulty and that the customer could injure themselves Recommends visiting a workshop Software in the seat module.
B3204202020-11-16. Service bulletin. ELECTRICAL SYSTEM; STEERING. GROANING NOISE DURING HEIGHT ADJUSTMENT OF THE ELECTRIC STEERING COLUMN: A groaning type noise is heard during the height adjustment.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.