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Service bulletins for the 2009 Audi A4

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.

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

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By trouble code

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

Bulletins, newest first
A011463 2033630-2017-11-08. Service bulletin. ENGINE; ELECTRICAL SYSTEM. Supersedes Technical Service Bulletin Group 01 number 13-86 dated April 15, 2013. The MIL is on. There is a rough idle. DTCs are stored in the ECM. Engine may have reduced performance without significant loss of power or stalling. Because there are a number of different misfire faults (unrelated to ignition coil operation) that could cause the MIL to illuminate, proper Guided Fault Finding (GFF) misfire diagnosis must be followed before any ignition coils are replaced.
A901342 2035902-2017-10-31. Service bulletin. ELECTRICAL SYSTEM:IGNITION. "Ignition lock faulty" message is displayed in the driver information display with the symbol shown at right. DTCs are stored in the comfort system central control unit. The "ignition lock faulty" message can be triggered by many different DTC entries. Presence of the message does not indicate that the ignition switch is faulty; the message typically has a different root cause. Replacing the ignition switch before completing GFF test plans typically does not correct the condition.
Customer Letter2017-10-31. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Audi has determined that a faulty fuel injector may cause minor misfire conditions and, in turn, cause the Malfunction Indicator Lamp (MIL) on the instrument cluster to illuminate due to the presence of specific fault codes caused by this component. In our continuing efforts to assure proper performance of Audi vehicles, your dealer will diagnose and replace a faulty fuel injector, if necessary, at no cost to you as long as the vehicle remains within the time and mileage limits of this warranty extension. Please keep this letter with your Warranty booklet and deliver it to any new owner, along with the owner?s manual.
A911304 2013422-2017-10-31. Service bulletin. ELECTRICAL SYSTEM. Supersedes Technical Service Bulletin Group 91 number 12-49 dated July 31, 2012. The Bluetooth® telephone cannot be connected to the vehicle?s Infotainment system. Certain restrictions are present when a Bluetooth device is connected to the vehicle. The restrictions vary depending on the vehicle system present.
A691326 2023323-2017-10-31. Service bulletin. AIR BAGS; ELECTRICAL SYSTEM. Supersedes Technical Service Bulletin Group 69 number 12-25 dated April 25, 2012. After the airbag control module (J234) has been replaced, the control unit cannot be coded via SVM spec/actual. An SVM code is required to code and parameterize the new service replacement airbag control module. Each model?s SVM code is provided in a parts bulletin (GP bulletin), which should have been referenced through ETKA when the module was replaced. The control module cannot be coded until the SVM code has been executed.
A571397 2022032-2017-10-31. Service bulletin. ELECTRICAL SYSTEM. Supersedes Technical Service Bulletin Group 57 number 13-92 dated August 1, 2013. The customer inquires about the operation of the vehicle locking, and may suggest that the vehicle ?locked itself?. The lock command history is stored in the convenience system control module (J393).
A271319 2029010-2017-10-31. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Supersedes Technical Service Bulletin Group 27 number 12-13 dated March 22, 2012. The customer may report a discharged battery when trying to start the vehicle. The condition results in a no start.
A271318 2023282-2017-10-31. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Supersedes Technical Service Bulletin Group 27 number 12-10 dated February 13, 2012. Battery testing and charging for vehicles equipped with a Battery Data Manager (BDM - J367). When the InCharge 940 is used as a battery charger in auto mode, it performs a battery condition test and may prematurely fail the battery if the charging takes place at the jumper posts in the engine compartment. This is due to the added resistance in the system between the battery and jumper posts. When the InCharge 940 is used as a battery charger in manual mode, the battery condition test is not performed.
A911598 2018187-2017-10-27. Service bulletin. ELECTRICAL SYSTEM. Supersedes Technical Service Bulletin Group 91 number 14-50 dated July 10, 2014. Customer may report that cracking, grinding, rattling, humming, whining, or similar interference is coming from one or more speakers. Parts of the speakers (such as the brackets, cables, or covers) or parts of the interior fittings (such as door covers, rear shelf, facings, or covers) can vibrate at certain frequencies, causing noises. The radio tuner or other control modules may be affected by electromagnetic interference from aftermarket electronic devices.
A941560 2017806-2017-10-25. Service bulletin. EXTERIOR LIGHTING; ELECTRICAL SYSTEM. Supersedes Technical Service Bulletin Group 94 number 14-32 dated January 23, 2014. The light bulb warning light is displayed in the instrument cluster with the following message: "Vehicle lights: malfunction". DTCs are stored in the vehicle electrical system control module. Exterior lights are functioning properly.
A971548 2013504-2017-10-21. Service bulletin. ELECTRICAL SYSTEM. Supersedes Technical Service Bulletin Group 97 number 10-15 dated October 20, 2010. Sporadic fault memory entries are stored in various control modules. Contacts may be widened (over 0.63 mm) if incorrect pins or incorrect methods for current flow tests are used. Either action may cause intermittent electrical connections, which can cause sporadic DTCs to be stored in various control modules.
A941564 2017806-2017-10-21. Service bulletin. ELECTRICAL SYSTEM. Supersedes Technical Service Bulletin Group 94 number 15-60 dated February 12, 2015. The light bulb warning light is displayed in the instrument cluster with the following message: "Vehicle lights: malfunction". DTCs are stored in the vehicle electrical system control module. Exterior lights are functioning properly.
A911579 2038824-2017-10-21. Service bulletin. ELECTRICAL SYSTEM. Supersedes Technical Service Bulletin Group 91 number 14-69 dated November 4, 2014. The following message appears on the MMI display: "Device or cable type not supported". The AMI cable being used is a genuine Audi-branded cable with an Audi part number (see Required Parts and Tools for a list of valid part numbers). The "Device or cable type not supported" message may be displayed when an incorrect AMI cable type is connected to the MMI system. Only cables with an Audi part number (i.e., 4F0.XXX.XXX) are supported by the MMI system. Volkswagen-branded cables look similar, but are not guaranteed to work with Audi MMI systems. The label on the end of an Audi-branded cable has an Audi logo and Audi part number. Audi-branded cables have unique firmware inside the hardware that can determine which MMI system and iOS device are connected to the cable. Volkswagen cables do not have this firmware. The firmware is required to allow the system to function normally due to the different technology available in the different MMI systems and in the different iPhones and iPod Touch devices. In addition, the AMI system was designed to play the music stored locally on the connected device only. Music streaming (from Spotify or Pandora, for example) is not supported, and music stored in the cloud (on Google Play, Amazon Prime, or iTunes Match/iCloud, for example) may drop out, pause, and skip when played.
A441660 2034445-2017-10-04. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Customer reports seeing the messages "TPMS" and "Tire pressure: System malfunction!" in the instrument cluster. This occurs after the engine is started, the message "TPMS" appears briefly and then turns off. There are no DTCs stored.
2033412/22016-05-23. Service bulletin. ELECTRICAL SYSTEM. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
2033630/22016-05-19. Service bulletin. ELECTRICAL SYSTEM. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
SB-2028053/22016-05-09. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ELECTRICAL SYSTEM:SOFTWARE. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
TSB-94-12-792012-08-14. Service bulletin. INTERIOR LIGHTING; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. AUDI: INSTRUMENT CLUSTER DISPLAY ILLUMINATES WITH VEHICLE LIGHTS MALFUNCTION WHEN LIGHT BULB IS OUT. MODELS A4, AUDI Q5 (2009-12), A5 (2008-12) AND A5 CABRIOLET (2010-12). *PE
TSB-37-12-382012-04-11. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:COLUMN SHIFT; POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:FLOOR SHIFT; ELECTRICAL SYSTEM:IGNITION. AUDI: VEHICLE HAVE ISSUES WITH IGNITION KEY CAN NOT BE REMOVED FROM IGNITION; VEHICLE IN PARK POSITION BUT UNABLE TO MOVE SHIFTER; ENGINE SWITCHED OFF BUT REMOTE CONTROL CAN NOT LOCK WITH ADVANCED KEY; PARK IS NOT RECOGNIZED ELECTRICALLY. *PE
TSB-01-12-392012-04-09. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE; ELECTRICAL SYSTEM. AUDI: ENGINE HAS REDUCED ENGINE PERFORMANCE WITHOUT LOSS OF POWER OR STALLING; CIRCUIT GROUNDS; FUEL QUALITY POOR; MIL IS CONSTANTLY ILLUMINATED OR FLASHING; ROUGH IDLE; IGNITION COILS INCORRECTLY INSTALLED; ELECTRICAL CONNECTIONS LOOSE OR DAMAGED. *PE
TSB-24-11-932011-12-07. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING:ENGINE. AUDI: UPDATE OF SERVICE SOFTWARE. THERE IS A LOW/UNEVEN ENGINE PERFORMANCE AND A LOSS OF ENGINE POWER. MODELS A4, A5, A5 CABRIOLET AND AUDI Q5
TSB-00-10-022011-02-14. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. AUDI: SOFTWARE VERSION MANAGEMENT (SVM) OPERATING INSTRUCTIONS. DETAILING THE GENERAL PROCESS FOR CARRYING OUT A SOFTWARE VERSION MANAGEMENT (SVM) SOFTWARE UPDATE FOR ANY TSB OR REQUIRED VEHICLE UPDATE (RVU). TROUBLESHOOTING INFORMATION IS INCLUDED. *PE
TSB-15-09-042011-02-08. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE; ELECTRICAL SYSTEM:STARTER ASSEMBLY:SOLENOID. AUDI: ONE OF THE FOLLOWING DTCS WILL BE STORED: CRANKSHAFT POSITION-CAMSHAFT POSITION CORRELATION BANK 1 SENSOR A & B; CRANKSHAFT POSITION-CAMSHAFT CORRELATION BANK 2 SENSOR A & B; A SLIGHT POWER REDUCTION MAY BE ASSOCIATED WITH THIS CONDITION. THIS CONDITION DOES NOT CAUSE STALLING. *PE
TSB-96-09-142010-07-26. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. AUDI: FALSE WARNING BY LANE CHANGE ASSISTANT (AUDI SIDE ASSIST). SOFTWARE FAULT. OPTIMIZED SOFTWARE. REPLACEMENT OF THE CONTROL UNIT IS NOT NECESSARY. WARRANTY CLAIMS FOR CONTROL UNIT REPLACEMENTS WITHOUT USE AND APPLICATION OF THIS TSB WILL BE DEBITED. *PE
TSB-96-09-122010-07-26. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. AUDI: FALSE WARNING BY LANE CHANGE ASSISTANT (AUDI SIDE ASSIST). SOFTWARE FAULT. OPTIMIZED SOFTWARE. REPLACEMENT OF THE CONTROL UNIT IS NOT NECESSARY. WARRANTY CLAIMS FOR CONTROL UNIT REPLACEMENTS WITHOUT USE AND APPLICATION OF THIS TSB WILL BE DEBITED. *PE

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