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Service bulletins for the 2012 BMW 335i

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.

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

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

Bulletins, newest first
B8406162018-12-03. Service bulletin. ELECTRICAL SYSTEM. ?BMW ONLINE NON-FUNCTIONAL: CHECK ICC-ID IN ACCOUNT. BMW Online/BMW ConnectedDrive not functional. Vehicle and service cockpit have different ICC-ID's (Integrated Circuit Card Identifier).
B8402142018-12-03. Service bulletin. ELECTRICAL SYSTEM. ?CONNECTEDDRIVE/BMW ASSIST SYSTEM DIAGNOSIS INFORMATION. ConnectedDrive/BMW Assist features are partially or completely inoperative. This Service Information bulletin is being published because vehicles are down for an extended period of time when researching system failures with ConnectedDrive or BMW Assist. This Service Information bulletin will assist you both in identifying the issue and providing technical support. CAUSE Not enough information is available for BMW NA engineers to assist the technician in diagnosing the root cause.
6107132018-12-03. Service bulletin. ELECTRICAL SYSTEM. Service Action: Repair Corrosion Protection on the Trunk B+ Connector. The corrosion protection on the outside of the trunk (back of rear right-hand wheel arch) around the battery positive connector is insufficient, and leads to corrosion on the body.
8405132018-11-26. Service bulletin. ELECTRICAL SYSTEM. TCB: Emergency Call Is Erroneously Triggered. An emergency call is erroneously made with no input from the driver. The following fault codes are stored in the TCB: * 0xB7F325 - Emergency call loud speaker: break in circuit * 0xB7F319 - Emergency call button: short circuit * 0xB7F326 - Emergency call loud speaker: short circuit to earth * 0xB7F33E - Automatic emergency call triggered frequently CAUSE TCB control unit error
6604122018-11-26. Service bulletin. ELECTRICAL SYSTEM. The PDC system falsely detects obstacles on all front and rear sensors when no obstacles are present around the vehicle. Software error in the REM (Rear Electronic Module)
6205132018-11-26. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). Head-up Display: Navigation Information Is Not Displayed. The navigation system information (turn advice - arrow view) is no longer displayed on the Head-up Display (HUD). Turning the ignition on and off doesn't resolve the issue. Application error between the instrument cluster and the Head-up Display
6132122018-11-26. Service bulletin. ELECTRICAL SYSTEM. "REM: Various Electrical Faults in Rear of a Vehicle. Various electrical faults associated with the rear of the vehicle occur, including one or more of the following: * The REM (Rear Electronic Module) does not respond to diagnosis. * The one-touch function of the rear power windows is inoperative. * The rear power windows cannot be initialized. * The trunk lid cannot be opened. * The brake lights are not working (check control message ""Left/right brake light failed"" is displayed). * The rear turn indicator lights are not working (check control message ""Rear left/right turn indicator failed"" is displayed). One or more of the following faults are stored in the REM: * ""804805 Internal software control unit fault"" * ""804876 Turn indicator, rear left, faulty"" * ""804877 Turn indicator, rear right, faulty"" * ""804872 Brake light, left, faulty"" * ""804874 Brake light, right, faulty"" * ""30195 Window regulator, passenger's side door, rear: invalid characteristic curve, no normalization present"" * ""30115 Power window, rear door on driver's side: invalid characteristic curve, no normalization present"" * ""301A0 Window regulator on passenger's side door, rear: system is not normalized"" * ""30120 Power window, rear door on driver's side: system is not standardized"" CAUSE Rear power window drive(s) faulty"
B1227162018-11-26. Service bulletin. ELECTRICAL SYSTEM. DIAGNOSING NON FUNCTIONING eDRIVE. * Vehicle will not go into "eDrive" * No pertinent electric drivetrain fault codes to assist with diagnosis * "eDrive" may be greyed-out in the Central Information Display (CID) and is not selectable * MSA deactivation * 12 volt battery failure * Intelligent Battery Sensor (IBS) failure.
B1209182018-11-26. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. NOISE FROM ENGINE WHEN STARTING. Noise when starting the engine. Engine making a rattling/grinding noise near the 12 volt starter motor. The following fault has been stored in the DME fault memory: * 21A511 - Start system, pinion starter motor: Timeout The following faults are also possible: * 21A504 - EGS, separation clutch: jammed open * 21A50A - Start system, pinion starter: Timeout successively occurred multiple times * 21A510 - Start system, EME: Timeout Consequential damage to flywheel (Torsional vibration damper) and automatic transmission may have also occurred. The starter motor is broken. It may be indicated by:
B0116182018-11-26. Service bulletin. ELECTRICAL SYSTEM; AIR BAGS. For the above-referenced vehicles with driver?s side airbag modules, BMW of North America, LLC (?BMW NA?) will provide a Customer Support Program as outlined in the Takata Settlement Customer Support Program Overview attachment. This ?component-specific? customer support program applies only if there is a defect in materials or workmanship of the Takata driver?s side airbag module in a listed vehicle.
B6411182018-11-26. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. STATIONARY CLIMATE CONTROL NOT WORKING AFTER HIGH VOLTAGE CHARGING. After the high voltage (HV) charging procedure, the stationary climate control (aka preconditioning) does not work. This is part of the normal design. There is no fault or defect.
B6130172018-11-26. Service bulletin. ELECTRICAL SYSTEM. RAIN/LIGHT SENSOR (RLS): OIL LEAKAGE FROM GEL PAD. ??Oil leaking from the Rain/Light Sensor (RLS). Note: This oil serves as a separation medium between the RLS mounting gel pad and the windscreen. The oil ensures damage free disassembly in case of repair. CAUSE The oil that serves as the separation medium of the Rain/Light Sensor (RLS) gel pad and the windscreen leaks out. Expose the Rain/Light Sensor (RLS) and properly clean the area of all oily residue. Note: The separating oil usually leaks only once from the pad at the RLS. Due to the small oil quantity in the gel pad, additional oil leakage is not plausible. Leaking oil does not impair the function of the RLS.
6602132018-11-26. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL. Rear-view Camera Does Not Turn On Automatically. When the reverse gear is selected, the rear-view camera does not turn on automatically. The driver must activate the rear-view camera using the iDrive controller or the camera button. CAUSE Software error in the Front Electronics Module (FEM)
6510122018-11-26. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM. "Headunit-Basic: CID is blank and ""NO SIGNAL"" is Displayed. Intermittently the Central Information Display (CID) is blank and ""NO SIGNAL"" is displayed on the CID. ??Fault Code B7F8C3 ""no response from CID (HW error: loss of CID communication)"" is stored in the HU-B Error in the Headunit-Basic (HU-B), also called Radio Professional or ENTRY head unit."
6102112018-11-26. Service bulletin. ELECTRICAL SYSTEM. Advanced Onboard Battery Diagnostics. Starting with the introduction of the F10 (5 Series), an advanced intelligent battery sensor has been used. This now makes it possible for the vehicle to monitor the condition of the battery in order to determine if the battery needs to be recharged or replaced, along with the remaining capacity of the battery. The analysis and testing of the battery's SoC (Stateof Charge) and SoH (State of Health) is now performed using ISTA (Integrated Service Technical Application) diagnosis. A separate test using a battery tester is no longer needed.
84030142018-11-26. Service bulletin. ELECTRICAL SYSTEM. iPhone: Connection Failures with iOS 7. There are various connectivity failures with the iPhone using iOS 7. Some examples are listed below: z Call disconnection z Contact List incomplete z General connection failures Apple software iOS 7 and its variants
6204142018-11-26. Service bulletin. ELECTRICAL SYSTEM. Service Action: Replace Instrument Cluster. The display in the instrument cluster is inoperative.
6126142018-11-26. Service bulletin. ELECTRICAL SYSTEM. Horn(s) Fail to Work. While trying to activate the horn, one or both horns fail to work. One or more of the following fault codes can be stored in the FEM: "8044A3 - Wiring, horn short circuit to earth" "8044A4 - Wiring, horn short circuit to positive" "8044A5 - Wiring, horn relay is defective or short circuit to positive" Water has entered the horn and caused it to fail internally (shorted out).
6520122018-11-26. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. RAD2plus: Radio Causes Battery Drain. The vehicle's battery state of charge is very low after the vehicle was parked for a longer period of time (e.g., overnight). The RAD2+ radio doesn't allow the vehicle to enter full sleep mode, and causes a current draw from the battery with ignition off.
6203132018-11-26. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Basic Instrument Cluster: Display Is Intermittently Inoperative. The display in the basic instrument cluster is intermittently inoperative. The following fault codes are stored in the instrument cluster: * B7F6B4 "Instrument cluster: Error in the display unit when switching off (NO SIGNAL)" and/or * B7F6AA "Display switch-off error when starting up" Software error in the instrument cluster
6201132018-11-26. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. All Gauges and Displays in Instrument Cluster Inoperative. All gauges and displays in the instrument cluster are inoperative, including the following: * Speedometer * Revolution counter * Fuel gauge * Engine oil temperature * No check control messages displayed ??No board computer information displayed Note: A power cycle does NOT rectify the issue. Software error in the instrument cluster
1222122018-11-26. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE; POWER TRAIN. Service Action: Program Control Units. When coming to a stop, there is the possibility of an unfavorable judder. This is due to the software parameters for downshifting and transmission clutch control. CAUSE Unfavorable vehicle software
B6126172018-11-26. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Charging of the high voltage battery is interrupted and will not complete. A change in the job structure in ISTA causes the BDC to open the 30B relay unexpectedly.
B6125172018-11-26. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. SME - HV BATTERY CELL MODULE VOLTAGE FAULTS. When diagnosing with ISTA or ISTA Next, a fault code (detailed below), regarding the cell voltage measurement, is entered in the battery management electronics (SME). ? 21F0C2 - High-voltage battery, cell supervision circuit 1: Voltage measurement (battery cell), line disconnection ? 21F0C3 - High-voltage battery, cell supervision circuit 2: Voltage measurement (battery cell), line disconnection ? 21F0C4 - High-voltage battery, cell supervision circuit 3: Voltage measurement (battery cell), line disconnection ? 21F0C5 - High-voltage battery, cell supervision circuit 4: Voltage measurement (battery cell), line disconnection ? 21F0C6 - High-voltage battery, cell supervision circuit 5: Voltage measurement (battery cell), line disconnection The customer might not have reported the situation as the fault code could have no effect on the vehicle operation. Erroneous fault in the fault memory of the SME, possible fault in a cell supervision circuit (CSC) or a cell module.
B6124172018-11-26. Service bulletin. STEERING: STEERING WHEEL/HANDLE BAR; ELECTRICAL SYSTEM. "?STEERING WHEEL BUTTONS DO NOT FUNCTION RELIABLY. ? Sporadic or continuous malfunction of multifunction steering wheel buttons ? CC Message ""Cruise control without function"" displayed ? Sporadic or continuous malfunction of shift paddles Frictional corrosion on connector line (wiring harness) between switch cluster and steering wheel"

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