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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
B6509152018-11-13. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL. HU-H: Headunit Resets Intermittently or Permanently. The HU-H (Headunit-High) resets intermittently or permanently. ? The display is inoperative and there is no audio output ? Automatic system start-up after a couple of seconds CAUSE Software error in the HU-H
B6406132018-11-13. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT:APPLIANCE:AIR CONDITIONER. A/C Cooling: Intermittent Reduction of Air Flow. Customer may complain of reduced air flow when the air conditioning system is operated for an extended time, usually longer than 30 minutes. INFORMATION Possibility of reproducing this situation is improved by the following conditions ? High outside ambient temperature ? High humidity Note: It is very difficult to duplicate this issue. The fault may be reproduced under the following conditions: ? Air-conditioning system switched on ? Driving Experience switch NOT set to Eco Pro ? Slower fan speeds ? Temperature setting below 68°F (20°C) ? Trip duration at least 30 minutes ? Outside temperature above 68°F (20°C) NOTE: After parking the vehicle or switching off the air-conditioning system for at least 20 minutes, the symptom disappears (ice melts off evaporator and puddles under the car from the A/C drains.). Evaporator starts to freeze up due to the position of the evaporator temperature sensor.
B6203122018-11-13. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. """Efficient Dynamics"" in the Instrument Cluster Partially Displayed During CC Message. After switching from terminal 15 to terminal R, the ""Efficient Dynamics"" wording in the instrument cluster, below the tachometer, is partially displayed while a CCM (Check Control Message) is shown. Only the word ""Efficient"" is displayed. Software error in the instrument cluster multi-information display"
B1240152018-11-13. Service bulletin. ELECTRICAL SYSTEM; ENGINE. "Due to a DME software status error, the on-board diagnostics (OBD) for the catalytic convertor and downstream oxygen sensor may not function properly. This could result that the OBD readiness for ""Oxygen sensor"" will not set as completed, but it would not have any effect on the actual tailpipe emissions."
B6517152018-11-13. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL; EQUIPMENT. "Active Sound Design ASD inoperative after programming. After programming with ISTA/P V3.56.1 Active Sound Design (ASD) no longer provides simulated engine sounds A fault is stored in the ASD module. Fault Code 8053A5 ""ASD; invalid coding data for equalizing"" Invalid ASD coding data"
B6516152018-11-13. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM); ELECTRICAL SYSTEM. Navigation CIC vehicle positioning temporarily incorrect. The Navigation system may temporarily display the vehicle in the wrong location. This mainly occurs on short sections of road and the vehicle position may take 2 or more minutes to be shown correctly. Invalid calculation in the CIC head unit.
B6126142018-11-13. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:HORN. "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)."
1204152018-11-13. Service bulletin. ELECTRICAL SYSTEM; ENGINE. SUBJECT DME Internal and Valvetronic Faults Set at Cold Ambient Temperatures. The Service Engine Soon light (MIL) can be illuminated with the erroneous internal and Valvetronic faults stored in the DME. The MIL will only come on if the fault has been detected on two (or more) consecutive drive cycles. The following fault codes may be stored in the DME: E Seriesz 36AE - DME, internal fault, Valvetronic: Current implausible One or more of the following secondary faults may also be stored: z 2DE2 - Valvetronic, actuation, voltage phase: Line disconnection z 2DE3 - Valvetronic, actuation, volt phase: Line disconnection z 2DE4 - Valvetronic, actuation, volt phase: Line disconnection F Seriesz 1F0905 - DME, internal fault, Valvetronic: Current implausible One or more of the following secondary faults may also be stored: z 135B10 - Valvetronic, actuation, voltage phase: Line disconnection z 135B11 - Valvetronic, actuation, volt phase: Line disconnection z 135B12 - Valvetronic, actuation, volt phase: Line disconnection Engine performance and driving characteristics are not affected. DME software diagnostic sensitivity.
B6113162018-11-13. Service bulletin. ELECTRICAL SYSTEM. "KLE CHARGING FAULT 21E6E9. During the ISTA short test diagnosis, fault code 21E6E9 - ""Charging interruption"" is found stored in the KLE (Convenience Charging Electronics) module. There is no customer complaint related to charging system, or a warning check control message display. CAUSE An Erroneous fault 21E6E9 stored in the KLE after completion of AC charging session."
B1221142018-11-05. Service bulletin. FUEL SYSTEM, OTHER:STORAGE:FUEL GAUGE SYSTEM; ELECTRICAL SYSTEM:SOFTWARE; FUEL SYSTEM, GASOLINE. Engine Malfunction Warning Illuminated with FC 193208: Fuel Level Plausibility Stored in DME. The customer states that the engine malfunction warning lamp is illuminated, and while filling the fuel tank, the fuel gauge did not show the proper fill level. After the vehicle is driven a short distance, the fuel gauge will update to full. When diagnosed, the following fault is stored in the DME: ? FC 193208 Fuel level, plausibility: deviation between consumption and level change Please proceed to the Procedure section. Vehicles with option 610 (Head-Up Display) are not affected. Please follow the ISTA/D test plan for the applicable faults stored in the DME, including the one listed in this bulletin. CAUSE A software error in the instrument cluster causes the fuel gauge to incorrectly update while refilling. The error occurs when the vehicle is powered up after refilling.
B6103142018-11-05. Service bulletin. ELECTRICAL SYSTEM. Check Control Messages Related to Battery Charge During Cold Ambient Temperatures. On cold days with an outside ambient temperature of less than 15°F, customers may notice a check control message related to the battery that is displayed on the instrument cluster and the control information display. Under these conditions, the vehicle starts. Various power management faults can occur. The check control message (ID 229) is caused by a heavily discharged battery. ? The check control message is triggered when the current state of charge (SoC) of the battery approaches the minimum SoC that is required to start the vehicle (start capability limit). ? In low outside ambient temperatures, the start capability limit of the vehicle is higher. Therefore it takes more energy from the battery to start a cold engine. ? Without the early warning of the check control message, the current state of charge would drop below the start capability limit and the vehicle would not start. ? The vehicle's intelligent power management system actively takes measures to increase the charge of the battery, such as increasing idle speed and reducing or shutting down certain electrical consumers.
B2702152018-11-05. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Rattling Noise from Transmission Tunnel. A rattling or knocking noise is heard in the area of the gear selector switch (GWS) during engine load reversal. CAUSE The vent tube for the transfer case is making contact with the transmission tunnel.
B1221142018-11-05. Service bulletin. ELECTRICAL SYSTEM. ?SI B12 21 14May 2015 Engine Electrical SystemsTechnical Service This Service Information bulletin supersedes SI B12 21 14 dated April 2015. designates changes to this revision SUBJECT Engine Malfunction Warning Illuminated with FC 193208: Fuel Level Plausibility Stored in DME. The customer states that the engine malfunction warning lamp is illuminated, and while filling the fuel tank, the fuel gauge did not show the proper fill level. After the vehicle is driven a short distance, the fuel gauge will update to full. When diagnosed, the following fault is stored in the DME: ? FC 193208 Fuel level, plausibility: deviation between consumption and level change Please proceed to the Procedure section. Vehicles with option 610 (Head-Up Display) are not affected. Please follow the ISTA/D test plan for the applicable faults stored in the DME, including the one listed in this bulletin. CAUSE A software error in the instrument cluster causes the fuel gauge to incorrectly update while refilling. The error occurs when the vehicle is powered up after refilling.
B0703142018-11-05. Service bulletin. ELECTRICAL SYSTEM. Diagnosing Stored Fault Codes to Help Avoid Repeat Repair Visits. Analysis of FASTA data and repeat repair visit reports indicates that there are many fault codes that are stored in the above vehicles, but they are not diagnosed to identify their root cause. Fault codes that are not diagnosed to find their root cause can lead to a repeat repair visit to the workshop by the customer. Where diagnosis (vehicle or short test) with ISTA has already started, it is important to diagnose the fault code(s) listed below (when they are stored in the vehicle) during the current workshop visit. This will help lead to a reduction in workshop repeat repair visits and higher customer satisfaction.
6103142018-11-05. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Check Control Messages Related to Battery Charge During Cold Ambient Temperatures. On cold days with an outside ambient temperature of less than 15°F, customers may notice a check control message related to the battery that is displayed on the instrument cluster and the control information display. Under these conditions, the vehicle starts. Various power management faults can be stored. When the outside temperatures drop below 46°F, the charging system is switch to full charge. CAUSE ? The check control message (ID 229) is caused by a heavily discharged battery. ? The check control message is triggered when the current state of charge (SoC) of the battery approaches the minimum SoC that is required to start the vehicle (start capability limit). ? In low outside ambient temperatures, the start capability limit of the vehicle is higher. Therefore it takes more energy from the battery to start a cold engine. ? Without the early warning of the check control message, the current state of charge would drop below the start capability limit and the vehicle would not start. ? The vehicle's intelligent power management system actively takes measures to increase the charge of the battery, such as increasing idle speed and reducing or shutting down certain electrical consumers.
1221142018-11-05. Service bulletin. ENGINE; ELECTRICAL SYSTEM. SI B12 21 14February 2015 Engine Electrical SystemsTechnical Service This Service Information bulletin supersedes SI B12 21 14 dated December 2014. designates changes to this revision SUBJECT Engine Malfunction Warning Illuminated with FC 193208: Fuel Level Plausibility Stored in DME. The customer states that the engine malfunction warning lamp is illuminated, and while filling the fuel tank, the fuel gauge did not show the proper fill level. After the vehicle is driven a short distance, the fuel gauge will update to full. When diagnosed, the following fault is stored in the DME: z FC 193208 Fuel level, plausibility: deviation between consumption and level change Please proceed to the Procedure section. Vehicles with option 610 (Head-Up Display) are not affected. Please follow the ISTA/D test plan for the applicable faults stored in the DME, including the one listed in this bulletin. CAUSE A software error in the instrument cluster causes the fuel gauge to incorrectly update while refilling. The error occurs when the vehicle is powered up after refilling.
0703142018-11-05. Service bulletin. ELECTRICAL SYSTEM. This Service Information bulletin supersedes SI B07 03 14 dated February 2015. designates changes to this revision SUBJECT Diagnosing Stored Fault Codes to Help Avoid Repeat Repair Visits. Analysis of FASTA data and repeat repair visit reports indicates that there are many fault codes that are stored in the above vehicles, but they are not diagnosed to identify their root cause. Fault codes that are not diagnosed to find their root cause can lead to a repeat repair visit to the workshop by the customer. Where diagnosis (vehicle or short test) with ISTA has already started, it is important to diagnose the fault code(s) listed below (when they are stored in the vehicle) during the current workshop visit. This will help lead to a reduction in workshop repeat repair visits and higher customer satisfaction.
B6618162018-11-05. Service bulletin. ELECTRICAL SYSTEM. INFORMATION ON THE OPERATION OF THE SMART OPENER. INFORMATION ON THE OPERATION OF THE SMART OPENER MODEL F07 (5 Series Gran Turismo) F10 (5 Series) F12 (6 Series Convertible) F13 (6 Series Coupe) F15 (X5) F16 (X6) F22 (2 Series Coupe) F23 ( 2 Series Convertible) F25 (X3) F26 (X4) F30 (3 Series Sedan) F31 (3 Series Wagon) F32 (4 Series Coupe) F33 (4 Series Convertible) F34 (3 Series Gran Turismo) F36 (4 Series Gran Coupe) F48 (X1) F80 (M3 Sedan) F82 (M4 Coupe) F83 (M4 Convertible) F85 (X5 M) F86 (X6 M) G12 (7 Series) I01 (i3 Series) Vehicles with option code SA-0322 (Comfort Access) without M-Sport trim INFORMATION The smart opener (Contactless tailgate) operates as described below: Ignition key must be within 3 feet behind the vehicle, clear from any interference like a smartphone The customer must be at least an arms-length behind the vehicle Kick your foot forwards & backwards under the vehicle in one quick movement The taillights flash confirming that the trunk will open The trunk then successfully opens For more information an instructional video can be viewed which demonstrates the operation. Thanks to BMW of Tenafly for providing the video. tinyurl.com/Autotrunk1 https://www.bmwtis.net/tiscode/cgi-bin/bulletin.aspx?sie_path=/tsb/bulletins/htm_store/358...9/3/2016 Page 2 of 2 WARRANTY INFORMATION Not applicable. [ Copyright (c)2016 BMW of North America, Inc. ] https://www.bmwtis.net/tiscode/cgi-bin/bulletin.aspx?sie_path=/tsb/bulletins/htm_store/358...9/3/2016
B0120162018-11-05. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. FOOTWELL MODULE: LIMITED WARRANTY EXTENSION TO 8 YEARS/125,000 MILES. When performing ISTA/D diagnosis and/or a programming procedure (software update) on an affected vehicle, the Footwell Module (FRM) could fail. There is a compatibility issue with certain combinations of vehicle software (Plant Integration ILevel) and the Footwell Module hardware installed in the vehicle.
B6526162018-11-05. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. "USB DEVICE IS NOT DETECTED BY CHAMP2 HEAD UNIT. Media connected to the USB connector is not recognized by the audio system. Playback of files from the media is not possible. Message displayed on the audio system display: ""Title cannot be reproduced"" ""Is being read"" (but never plays back any audio) CAUSE Media with data files stored in more than 32 directories or 32 subdirectories within a directory. Media with a large number of files. Media exceeds total storage capacity of 32 GB."
B0905152018-11-05. Service bulletin. EXTERIOR LIGHTING; ELECTRICAL SYSTEM. Front Parking Lights Inoperative. After programming the vehicle with ISTA/P 3.56.1, both front parking lights (integrated in the headlights) have been deactivated and no Check Control message is displayed. CAUSE FEM software error in ISTA/P 3.56.1
B6525162018-11-05. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. USB CABLE: BATTERY DISCHARGE/AUDIO FAILURE/RADIO RECEPTION. No sound from the radio, telephone, gong signal and or PDC. Poor radio reception and failure of the telematics systems. Possible Check Control system message: o Battery discharge when engine off. o Caution, no acoustic warning signals. Non BMW approved (third-party supplier) USB cable plugged into the USB port.
B6523162018-11-05. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. ?AUDIO VOLUME NOT RESTORED AFTER MSA STOP, ENTRY HEAD UNIT. Volume of audio system (when set to near maximum) is reduced when Auto Start-Stop (MSA) stop occurs and is not restored upon automatic engine restart. This is normal system behavior - serves to protect the head unit, battery drain and avoidance of incremental leaps in the loudness. The loudness is reduced to 2/3 of maximum and is not restored. Note: Air conditioning output is also reduced upon MSA stop and is not restored for similar reasons.
B8404162018-11-05. Service bulletin. ELECTRICAL SYSTEM. SOS MALFUNCTION DISPLAYED. An SOS malfunction is seen in the Kombi. When pressing the E-Call/SOS button in the overhead console, nothing happens. Fault code B7F33C (internal ECU error) is stored in the Telematics control unit (ATM/TCB2). There are 2 known causes for this failure. They are as follows: Software file missing from the ATM/TCB2 control module Water leak at shark-fin leading to corrosion in the ATM/TCB2 control module
B6308162018-11-05. Service bulletin. EXTERIOR LIGHTING:TURN SIGNAL; ELECTRICAL SYSTEM. TURN SIGNAL - INTERMITTENTLY FLASHES AT FASTER RATE. Turn signal, intermittently, flashes at faster rate or not at all. Software error in FEM (Front Electronics Module)

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