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Service bulletins for the 2018 BMW 640i

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.

279 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
B7201252026-02-23. Warranty extension. AIR BAGS; ELECTRICAL SYSTEM; SEATS. A situation may occur where the front passenger seat is not occupied; however, a “fasten seat belt” warning and a front passenger seat air bag deactivation message appears. If the situation is currently present, sit in the seat and move the seat to a slightly different position. The POL (Passenger Occupancy Light) light should now function correctly. In some cases, the Air bag Warning Light was illuminated, and the following Advanced Crash Safety Module (ACSM) fault is stored: 930A1C - Front passenger seat occupancy detection transmitting fault (moisture)
B7201252025-04-18. Warranty extension. ELECTRICAL SYSTEM; AIR BAGS. The Supplemental Restraint Systems (SRS) Front Passenger’s Seat Occupancy Capacitive Interior Sensor (CIS) Mat for defects in materials and/or workmanship that causes a false seat occupancy alert to occur has been extended to 10 years / 120,000 miles as determined from the vehicle's original in-service / first delivery date.
B5108192024-02-01. Service bulletin. VISIBILITY:POWER WINDOW DEVICES AND CONTROLS; ELECTRICAL SYSTEM. The basic conditions for initializing the power windows are not met.
B6105242024-02-01. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT; ELECTRICAL SYSTEM. The Central Information Display goes black intermittently due to resets of the Head Unit (HU-H3). FaultB7F8F9 â“ âHU-H: Resetâ will be stored in the HU-H3.
B6113052024-02-01. Service bulletin. ELECTRICAL SYSTEM. The electrical system of BMW vehicles has been subject to an ongoing development process over the last few years. This has led to increased demands being placed on the battery. This document covers important information for the dealer on how to handle “discharged battery” complaints.
B6308212023-07-24. Service bulletin. EXTERIOR LIGHTING; ELECTRICAL SYSTEM. Headlight check control (CC) message 128 "High beam headlight failure" is displayed. The following fault codes are stored during a vehicle test: 80419A - Left high-beam headlight: Short circuit and/or 8041A5 - light outputs: Number of permitted short circuit cycles exceeded
B6515232023-06-26. Service bulletin. ELECTRICAL SYSTEM. After programming the head unit (HU-H2), activating the FSC (German word Freischaltcode) Enabling Codes repeatedly fails.
B6101232023-06-26. Service bulletin. ELECTRICAL SYSTEM. Due to a software error, the vehicle sporadically does not achieve sleep mode. As a result, the 12-volt battery becomes discharged and may cause a no-start condition.
SIB6608232023-05-15. Service bulletin. ELECTRICAL SYSTEM:ADAS:HUD:CAMERA/SENSOR; ELECTRICAL SYSTEM:ADAS:DRIVER MONITORING:CAMERA/SENSOR. Issues with the various functions of the camera-based driver assistance systems (KAFAS system) can possibly lead to following customer complaints: KAFAS camera system deactivates itself, due to system restrictions that are not clear to the customer KAFAS camera system cannot be activated due to system restrictions that are not clear to the customer Road signs are sporadically not detected.
B8408222023-05-01. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. The 3G network in the US has been shut down. This means that only the 4G network will be available. In the 4G network, voice calls will be transferred via the Voice over LTE (VoLTE) function. For this purpose, the SIM card must perform an IMS registration in the mobile communication network. Due to a production error, the telematics control units were delivered without an IMS configuration. The Connected Drive voice services (Concierge Call, BMW Assistance, and emergency call voice) can no longer be used regionally in the US in vehicle with telematics control units ATM-1 and TCB-4G. Voice control of the vehicle and all other telephone (paired mobile devices) functions are not affected. Emergency call location data is unaffected.
B6101232023-05-01. Service bulletin. ELECTRICAL SYSTEM. Due to a software error, the vehicle sporadically does not achieve sleep mode. As a result, the 12-volt battery becomes discharged and may cause a no-start condition.
SIB6624192022-08-22. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. 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. Note: Opening, closing and starting via the BMW Digital Key or the Digital Key Card are not affected.
SIB6513122022-07-05. Service bulletin. ELECTRICAL SYSTEM. The Headunit High (HU-H), also called NBT, began replacing the Car Information Computer (CIC) on certain MY2013 vehicles with option 609 (as of 7/2012 production). This uses map North America NEXT. The Headunit High 2 (HU-H2), also called NBT-EVO, superseded the NBT HU and was introduced in 3/2014. This uses map North America EVO. The Headunit High 4 (HU-H4, also called MGU21) superseded the MGU starting with certain MY2021 vehicles with option code 6U3 Live Cockpit Professional. This uses map North America JOY. The ENTRY Media/Navigation (HU-B) is the low line business version of the navigation system and was introduced in 3/2014. This uses map North America ROUTE. The ENTRY NAV EVO (HU-B2) replaced Entry Media/Navigation as the low-line business version and was introduced in certain MY2018 vehicles. This uses map North America WAY.
B6107222022-05-31. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. Check Control message (CCM) displays "Vehicle key missing" after engine start.
B6201222022-02-22. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; EQUIPMENT:ELECTRICAL. Temporary black screen in the instrument cluster.
B6509192021-12-20. Service bulletin. ELECTRICAL SYSTEM. Customer states the following about their vehicle: active radio or music source is interrupted, the navigation is no longer available, a black screen is shown in the Control Display, the system works again after a short interruption.
B6408212021-12-13. Service bulletin. ELECTRICAL SYSTEM. The air conditioning cycles from cold to warm air while driving or while at a stand still. The vent outlet temperatures vary by 25 degrees Fahrenheit or more (38F to 60F +) without changing any climate control settings. In some cases the air conditioning may have stopped blowing cold air altogether.
SIB 62 03 212021-10-25. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING. When the vehicle is operated in Sport Mode, the engine speed is no longer displayed in the BMW Head-Up Display (HUD).
B6507212021-08-23. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:INFOTAINMENT:BLUETOOTH/WIFI. HU-H3 MGU RESETS DUE TO BLUETOOTH CONNECTION WITH SAMSUNG ANDROID 11 : The head unit resets when using various apps (e.g., YouTube, Spotify, etc) on the connected mobile phone. This affects Samsung mobile phones (e.g., Galaxy S20 / S21) with the Android 11 operating system.
B8402212021-08-09. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; COMMUNICATION:MANUFACTURER TELEMATICS; ELECTRICAL SYSTEM:SOFTWARE. The discontinuation of 3G cellular communication for Combox, TCB 3G and ATM 3G (Telematics ControlModule) can no longer be supported by the cellular network provider starting February 2022. The decision to phase out 3G network technology was made at the discretion of the respective cellular carriers and lies beyond the control of BMW. Due to the phase-out, BMW Assist and ConnectedDrive services will no longer be supported after this date.
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.
B6208182021-04-26. Service bulletin. ELECTRICAL SYSTEM. INSTRUMENT CLUSTER DISPLAY SHAKES-SHIFTS TO THE LEFT: The Instrument cluster intermittently flickers, shakes and has shifted to the left.
B6618202021-02-08. Service bulletin. ELECTRICAL SYSTEM. ?GESTURE CONTROL UNINTENDED OPERATION: The Gesture camera inadvertently detects movement and performs unintended operations.
B6618202021-02-01. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. ?GESTURE CONTROL UNINTENDED OPERATION: The Gesture camera inadvertently detects movement and performs unintended operations.

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