2021 Audi A4 Technical Service Bulletins

1,057 technical service bulletins (TSBs) are on record for the 2021 Audi A4. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11034651Jun 4, 2026Body and structure. This bulletin provides informaoitn when the rear parking sensor sometimes does not work, is loose, or there is a rear parking sensor fault message.
• 11034642Jun 4, 2026Other or unknown. This Reporting Obligation requires technicains to contact the Technical Assistance Center (TAC) in cases where the airbag/seatbelt is deployed/not deployed; general accident information; and fire and overheat damage.
• 11034658Jun 1, 2026Other or unknown. This bulletin provides a deployment overview for customer service packages MLB and MQB for MIB3/connectivity box/OCU3/LSR.
• 11034644Jun 1, 2026Electrical system. This bulletin provides information when the Emergency call SOS light has a fault, LED red; DTC B200000.
• 11033474May 28, 2026Transmission and drivetrain. This bulletin provides information when there are noises after selecting a ear while idling and the vehicle is stationary, or while driving.
• 11033465May 27, 2026Transmission and drivetrain. This bulletin provides informatin when there is binding or vibrations in tight turns with quattro Ultra.
• 11033457May 26, 2026Other or unknown. This is a notice for software changes with the ODIS diagnostic program to correct the communication during vehicle programming function: A software fix is needed to correct the issue: The ODIS Audi Brand update 2.41.1 is setting a ODS5003E error code when you perform the 90TV SVM flash.
• 11033492May 22, 2026Electrical system. This bulletin provides informaiotn when the starter battery is discharged or defective.
• 11033466May 20, 2026Electrical system. This bulletin provides informaiton when traffic jam assist is unavailable/active lane assist fault is reported in the instrument cluster.
• 11033469May 15, 2026Visibility (wipers, defrost, mirrors). This bulletin provides informaiton when the windscreen/rear window washer pump is not working (B126101, B126113).
• 11033483May 8, 2026Electrical system. This bulletin provides information when the convenience openeing does not work.
• 11033475May 6, 2026Transmission and drivetrain. The high-voltage batteries in electric vehicles are subject to various ageing effects which could lead to the energy content (energy density) being reduced. This reduction in the energy content, which is due to factors. Revised header. Added Model years
• 11033473May 5, 2026Body and structure. This bulletin provides information when there is noise from the backrest of the front seat.
• 11032165Apr 30, 2026Electrical system. This bulletin provides informaiotn when the starter battery is discharged or defective.
• 11032131Apr 30, 2026Other or unknown. This bulletin provides diagnostic information for the vehicle locking system.
• 11032194Apr 22, 2026Other or unknown. This bulletin is informational and contains information on the various warning lamps that may appear.
• 11032137Apr 22, 2026Other or unknown. This bulletin provides information about professional noise analysis with the VAS 611 015 PICO-NVH tool
• 11031064Mar 27, 2026Other or unknown. This Reporting obligation requests that technicians contact the Technical Assistance Center (TAC) when the diagnostic tester refers to this reportin gobligation or to TPI 2033392.
• 11031053Mar 26, 2026Electrical system. This bulletin provides informaiton regarding the Universal Traffic Recorder.
• 11030994Mar 25, 2026Body and structure. This bulleitn provides informaiotn when there are cracking/craking noises during load changes, or sever vehicle body torsion.
• 11030983Mar 24, 2026Suspension. This bulletin provides informaiotn regarding squeaking noises when steering or maneuvering.
• 11031051Mar 20, 2026Electrical system. This bulletin provides informaiotn about various infortainment system complaints.
• 11031048Mar 20, 2026Body and structure. This TSB provides information when there is moisture in footwell, damp smell in passenger compartment.
• 11031003Mar 20, 2026Transmission and drivetrain. This bulletin provides information when the hydraulic pump cannot be adapted - P17EF00 in gearbox control unit.
• 11030985Mar 17, 2026Electrical system. This bulletin provides information when the parking assistance gives false warnings.
• 11030995Mar 13, 2026Electrical system. This bulletin procides information when there is a pixel error in the Audi virtual cockpit.
• 11030993Mar 13, 2026Electrical system. This bulletin provides informaiton when traffic jam assist is unavailable/active lane assist fault is reported in the instrument cluster.
• 11030987Mar 13, 2026Other or unknown. This bulletin provides information about where to download the Audi frequency app.
• 11031000Mar 10, 2026Engine. This bulleitn provides informaiton when there is a loose engine oil filler cap; P006800, P227900, P050700 - 2.0 ltr. TFSI.
• 11031040Mar 4, 2026Electrical system. This bulletin provides informaito when Apple CarPlay/Android Auto does not react to touch inputs.
• 11030991Mar 4, 2026Electrical system. This TSB provides information when the Emergency call SOS light has a fault, LED red; DTC B200000.
• 11030984Mar 2, 2026Electrical system. This bulletin provides information when the parking assistance gives false warnings.
• 11030980Mar 2, 2026Air bags. The National Highway Traffic Safety Administration (NHTSA) has issued an urgent warning regarding counterfeit replacement airbag inflators that are being installed in used vehicles.
• 11029368Feb 20, 2026Engine. This bulletin provides information on the use of the Audi frequencly analysis app, and where the application can be downloaded.
• 11029367Feb 20, 2026Engine. This bulletin provides information on VIN Plates, Safety Certification labels, and the ordering procedures.
• 11029371Feb 18, 2026Suspension. Thisbulleitn provides informaiotn when there are cracking/craking noises during load changes, or sever vehicle body torsion.
• 11029407Feb 17, 2026Electrical system. This bulletin provides informaiotn when the starter battery is discharged or defective.
• 11029370Feb 17, 2026Electrical system. This TSB provides information when there are noises from the area around the instrument cluster.
• 11029372Feb 12, 2026Body and structure. Thisb ulleitn provides informaiton when there are noises when the exterior mirrors fold in/out.
• 11029369Feb 12, 2026Other or unknown. This Reporting Obligation requires technicains to contact the Technical Assistance Center (TAC) in cases where the airbag/seatbelt is deployed/not deployed; general accident information; and fire and overheat damage.
• 11029392Feb 6, 2026Electrical system. This bulletin provides a osftware update for vehicles with MIB3, NAR Version ST37+LSR).
• 11029395Feb 4, 2026Electrical system. This bulletin provides information regarding fault finding and repair information for electric tailgate.
• 11028467Jan 30, 2026Electrical system. This bulletin provides information when there are no services in the MMI and the SOS LED does not turn green after PDI.
• 11028433Jan 22, 2026Transmission and drivetrain. This bulletin provides informatin when there is binding or vibrations in tight turns with quattro Ultra.
• 11028448Jan 21, 2026Electrical system. This bulletin provides information regarding contact checks for event memories, intermittent.
• 11028439Jan 21, 2026Electrical system. This bulletin provides information regarding fault finding and repair information for electric tailgate.
• 11028434Jan 21, 2026Visibility (wipers, defrost, mirrors). This bulletin provides information when the air conditioner is not working, or has a restricted function; leak at the O-ring.
• 11028407Jan 14, 2026Other or unknown. This bulletin provides a deployment overview for customer service packages MLB and MQB for MIB3/connectivity box/OCU3/LSR.
• 11028401Jan 14, 2026Electrical system. This bulletin provides information for when the 12V socket and/or the cigarette lighter are not working.
• 11028398Jan 14, 2026Engine. This bulletin provides information regarding UV leak additive for finding oil leaks.

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