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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.

By type

By component

By trouble code

Bulletins, newest first
6608142018-11-26. Service bulletin. BACK OVER PREVENTION. Side View Camera Does Not Display Picture. The side view camera does not display a picture: z After engaging reverse gear z Activating the side view camera via the switch on the center console near the gear shift CAUSE z Water (moisture) entering the cable assembly, causing corrosion on the pins in the connector(s) at the camera(s) z Poor cable connection to the camera(s)
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).
3203142018-11-26. Service bulletin. STEERING. Power-Assisted Steering Failure. The power-assisted steering fails with a warning lamp in the instrument cluster or a check control message in the Central Information Display. In some cases, the Dynamic Stability Control warning lamp (DSC) in the instrument cluster may also be illuminated. Failure of the power-assisted steering may be caused by various software-related issues. The following codes may be stored in the fault memory of the Electric Power Steering (EPS): Scenario 1: 0x4823E1 Scenario 2: 0x4823CB/0x4823CC Scenario 3: 0x4823D2 and/or 0x4823EC Scenario 4: 0x48239C (DSC warning lamp lights up in the instrument cluster) Scenario 5: No communication with the EPS is possible (not accessible using diagnostics) Scenario 6: 0x4823EE and 0x4823C2
3105142018-11-26. Service bulletin. SUSPENSION. Front Suspension Ride Height Has Dropped. INFORMATION Damages due to outside influences are not covered under the terms of the BMW limited warranties.
2801142018-11-26. Service bulletin. POWER TRAIN. DCT Transmission: Oil Leakage Diagnosis. INFORMATION Incorrect diagnosis of DCT (Double-clutch Transmission) oil leaks may lead to unnecessary part replacements and repeat customer repair visits. When diagnosing complaints related to DCT fluid leaks, please use the attached diagnostic procedure. WARRANTY INFORMATION Not applicable. ATTACHMENTS View PDF attachment B280114_DCT_Oil_Leak_Diagnosis. [ Copyright (c)2014 BMW of North America, Inc. ] https://www.bmwtis.net/tiscode/cgi-bin/bulletin.aspx?sie_path=/tsb/bulletins/htm_store/16672.2.B28011... 12/24/2014
1305142018-11-26. Service bulletin. ENGINE. . INFORMATION To properly diagnose the customer's complaint, the applicable test plan for the misfire faults stored in the DME must be performed to avoid repeat repairs. If a misfire fault is not stored in the DME memory and an engine related drivability complaint is received, follow the path below to manually start the misfire test plan (AT1214_TVD4_MISFIRE_20): 1. Perform a vehicle test. 2. Select "Function Structure." 3. Select "01 Engine." 4. Select "Engine electronics MEVD." 5. Select "Misfire detection." 6. Follow the steps in the test plan and select "Basic check (start)" first. Do not select "Additional check" at this time. 7. If the result of the "Basic check" indentifies a fuel system component failure, replace the identified component. If the result of the "Basic check" test plan was inconclusive, go to step 7. After the component replacement, perform the "Basic check" portion of the test plan again to verify if the diagnosis was correct and the vehicle condition has been rectified.
1301142018-11-26. Service bulletin. ENGINE AND ENGINE COOLING. N47T and N57T Diesels with SCR Efficiency Faults Stored. A. The Service Engine Soon lamp is on (MIL) with either or both of the following SCR efficiency faults stored in the DDE: 26F500 - SCR system, efficiency: Efficiency too low 26F600 - SCR system, efficiency: Efficiency too low B. In addition, a Check Control message of "Incorrect diesel exhaust fluid" may be displayed with "no start scenario countdown" active. This would cause any of the following additional faults to be stored, depending on the SCR system status at the time. 2C4E00 - SCR system: System error and poor urea/water mixture quality detected 26FD00 - Reducing agent metering, long-term adaptation: Adaptation value too high 29FB00 - SCR system, warning and deactivation scenario: Warning level 1 29FC00 - SCR system, warning and deactivation scenario: Warning level 2 CAUSE Unfavorable DDE software
1221102018-11-26. Service bulletin. FUEL SYSTEM, GASOLINE. N51 Engine: Service Engine Soon Lamp Illuminated - Loss of Power and Various Faults Stored in the DME. The customer complains that the Service Engine Soon lamp is illuminated. The vehicle has lost power; the engine cranks but will not start; and various faults are stored in the DME for engine misfire and/or mixture adaptations. CAUSE The vehicle has lost fuel system delivery pressure due to a loose or split fuel line inside the fuel tank. The failure is related to an unfavorable stacking of tolerances between the rubber fuel hose and the plastic regulator nipple or deterioration of the rubber hose construction material.
5115112018-11-26. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS:CONCEALMENT DEVICES. Headlight Washer Nozzle Cover Sticks Out.
1209122018-11-26. Service bulletin. STEERING. Intermittently, the engine idle speed may fluctuate up and down or cut off under any of the following circumstances, without any relevant faults stored in the DME memory: * While driving off throttle (coasting) and braking at speeds below approx. 10 mph * While idling, low-speed maneuvering such as parking, or if the steering is turned to the full-lock position Unfavorable DME software
1201132018-11-26. Service bulletin. POWER TRAIN. "Transmission Intermittently Goes into ""P"" or ""N"" after MSA Engine Start. The transmission can intermittently go into the Park (P) or Neutral (N) position after an MSA engine start without any customer influence. This problem is very sporadic, difficult to reproduce, and no relevant faults are stored. Unfavorable DME/EGS software"
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.
6517122018-11-26. Service bulletin. SEAT BELTS; SEAT BELTS:FRONT:WARNING LIGHT/DEVICES; EQUIPMENT; AIR BAGS. Check Control Message "Restraint System Faulty" Is Displayed. Intermittently the check control message "Front Passenger Restraint System Faulty" is displayed in the Central Information Display. The following information is read from the vehicle: 1. Key Reader Vehicle Defects Details shows DTC: 930AB3. 2. ISTA fault code "930AB3-POL: indicator lamp for passenger airbag deactivation: short-circuit to plus" The fault condition is not present. 3. ISTA check control message ID 109 CAUSE FZD (Operating Unit for Roof) software error causes the POL (Passenger Airbag Off Lamp) to intermittently malfunction.
6510122018-11-26. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT:ELECTRICAL; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING 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.
6503132018-11-26. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT. Headunit-Basic: All CD Tracks Are Displayed as "track 0" After Restart. INFORMATION Do not replace parts and do not perform a repair attempt! Note: The issue is rectified after a different CD is inserted into the in-dash CD drive. Explain to the customer that this only happens when the vehicle is turned off with CD mode active. This Service Information will be updated as soon as a solution is available. Software solution is expected to be available with ISTA/P 2.50.1 in July 2013. New integration level: F020-13-07-501 or higher WARRANTY INFORMATION Not applicable.
6502132018-11-26. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Headunit-Basic Does Not Start Up and "BMW" Is Permanently Displayed. The Headunit-Basic (HU-B), also called Radio Professional or the ENTRY head unit, does not start up and "BMW" is permanently displayed on the CID (Central Information Display). No fault code is stored in the head unit. Hardware issue in the HU-B
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
5110112018-11-26. Service bulletin. EQUIPMENT; STRUCTURE:EMERGENCY:ESCAPE/EGRESS/EXIT. Anti-trap Is Activated when Raising the Front Side Windows. When closing the front side windows using the convertible top switch or the central power window switch, one or both front side windows come to a stop at the top third travel area, and then reverse direction slightly. When the switch is actuated again, the windows will close normally. CAUSE The front side windows contact the rear side windows, causing the anti-trap feature of the front side windows to trigger.
3201122018-11-26. Service bulletin. STEERING. Teile Clearing for Steering Systems.
1224122018-11-26. Service bulletin. ENGINE. N20 and N26 Engine: DME FC CDA904 FA CAN Message State Trailer 0x2E4 Is Missing.
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
1110122018-11-26. Service bulletin. ENGINE. ?N20 Engine: Repeated Juddering or Surging While Accelerating. The vehicle judders or surges repeatedly while accelerating in hot ambient temperatures between 3,000 RPM and 5,000 RPM. The Service Engine Soon lamp is not illuminated, and no fault codes are stored in the vehicle memory related to this complaint. CAUSE The EPDW (electropneumatic pressure convertor) for the turbocharger wastegate valve is binding internally.
1214122018-11-26. Service bulletin. ENGINE. SI B12 14 12 October 2014 Engine Electrical Systems Technical Service This Service Information bulletin supersedes SI B12 14 12 dated February 2014. designates changes to this revision SUBJECT N51, N52K, N52T and N55 Engine: Various Faults Stored in DME Related to VANOS and Camshaft Position. A rattling noise can be heard from the engine compartment; the engine loses power; and the Service Engine Soon lamp is illuminated. One or more of the following faults may be stored: E70, E71, E82, E88, E90, E91, E92 and E93: 2A7C - VANOS, inlet, cold start 2A82 - VANOS, intake, variable cam control test 2A7A - VANOS, exhaust, cold start 2A87 - VANOS, intake: control fault, camshaft sticking 2D5A - VANOS, intake: control fault, camshaft sticking 2D5B - VANOS, intake: control fault, position not reached 2D54 - VANOS, exhaust, cold start: not controllable 2D55 - VANOS, intake, cold start: not controllable 2D60 - VANOS, exhaust: control fault, camshaft sticking 2D61 - VANOS, exhaust: control fault, position not reached 2D9F - Camshaft input sensor: signal implausible 2DA1 - Camshaft exhaust sensor: signal implausible 300C - Camshaft input sensor: signal high 300D - Camshaft input sensor: signal low 300E - Camshaft exhaust sensor: signal high 300F - Camshaft exhaust sensor: signal low F07, F10, F12, F13 and F25: 130104 - VANOS, intake: control fault, camshaft sticking 130108 - VANOS, intake: control fault, position not reached 130304 - VANOS, exhaust: control fault, camshaft sticking 130308 - VANOS, exhaust: control fault, position not reached 130E11 - Camshaft input sensor: signal implausible 130F11 - Camshaft exhaust sensor: signal implausible 164020 - Camshaft input sensor: signal high 164021 - Camshaft input sensor: signal low 164030 - Camshaft exhaust sensor: signal high 164031 - Camshaft exhaust sensor: signal low CAUSE One or both (intake and/or exhaust) of the VANOS gear assemblies may have faulty assembly bolts. One or more of the four assembly bolts have loosened or broke

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