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.

• 10233378Mar 27, 2023Electrical system. This bulletin provides information for when the 48V battery is in a low voltage protection state and will not accept a charge; DTC P0A7D00 is logged.
• 10233367Mar 27, 2023Electrical system. This bulletin states to contact the Technical Assistance Center in instances where the MIL is on and DTC P45600 may be stored in the ECM.
• 10233365Mar 27, 2023Electrical system. This repair authorization states to contact the Technical Assistance Center in instances where the MIL is on and DTC P04F000 may be stored in the ECM.
• 10233737Mar 23, 2023Equipment. This bulletin provides information on how to update the navigation map.
• 10233696Mar 23, 2023Wheels. This technical service bulletin provides instructions for correcting a clicking sound from the wheel bearing(s).
• 10233645Mar 23, 2023Equipment. This bulletin provides information for when various warning lamps are unintentionally illuminated while driving with the ACC activated.
• 10233544Mar 23, 2023Visibility (wipers, defrost, mirrors). This bulletin provides information for when the rear window defogger is not operational.
• 10233489Mar 23, 2023Steering. This bulletin states that squeaking noises which may be more prevalent in wet weather during steering is normal and repair is not needed.
• 10233376Mar 23, 2023Electrical system. This bulletin provides information for when the vehicle does not start due to a drained battery.
• 10233636Mar 17, 2023Back-over prevention (rear camera). This bulletin provides information for when the virtual cockpit is distorted due a broken screen caused by outside influence.
• 10233628Mar 17, 2023Body and structure, Back-over prevention (rear camera). This bulletin provides instructions for when the Audi virtual cockpit display remains blank when the driver's door is opened and the driver enters the vehicle. After the ignition is switched off and back on, the display may return to normal operation, but may also remain black.
• 10233300Mar 17, 2023Suspension, Brakes. This bulletin provides instruction for when there are noises heard during steering or braking maneuvers.
• 10233296Mar 17, 2023Engine cooling. This bulletin provides instructions for when there is a grinding/squeaking/tweeting noise coming from the engine compartment OR there is a message in the driver information system stating "Electrical system Malfunction! Please go to workshop". DTC P2BA300 may be stored.
• 10233700Mar 8, 2023Electrical system. This bulletin provides information on some situations that may affect wireless charging
• 10233302Mar 8, 2023Electrical system, Back-over prevention (rear camera). This bulletin states that it takes about 20 seconds after switching the ignition on for the Audi Pre Sense symbol advising that "Audi pre sense not available at the moment"
• 10232103Feb 21, 2023Equipment. This bulletin provides instructions for a software update in cases when "SAFE CP" is displayed in the center of the screen of the Audi virtual cockpit, the gauges function normally, and DTC B200FF0 may be stored.
• 10232045Feb 16, 2023Equipment, Visibility (wipers, defrost, mirrors). This bulletin provides information on a software update for when saved addresses, favorites, last destinations, HVAC favorite button assignment, and/or icon and shortcut order are lost sporadically; In rare cases the screen may turn completely blue until a bus sleep or an MMI reboot is performed. For Q3 vehicles, MMI may get stuck on the welcome screen. No DTCs are stored.
• 10232049Feb 14, 2023Electrical system. This bulletin provides instructions for when the anti-theft alarm has gone off for no reason, or did not go off at all. No DTCs are stored.
• 10232044Feb 13, 2023Equipment, Visibility (wipers, defrost, mirrors). This bulletin provides information on a software update for when saved addresses, favorites, last destinations, HVAC favorite button assignment, and/or icon and shortcut order are lost sporadically; In rare cases the screen may turn completely blue until a bus sleep or an MMI reboot is performed. For Q3 vehicles, MMI may get stuck on the welcome screen. No DTCs are stored.
• 10232043Feb 10, 2023Equipment, Electrical system. This bulletin provides information to address when the Audi connect "User management" screen is greyed out, and the customer cannot complete the key user pairing. OR the SOS emergency button is red or flashing read. DTCS P169A00 and U13EB00 are present in the system.
• 10232038Feb 10, 2023Electrical system, Equipment. This bulletin provides information for when the 12V socket and/or the cigarette lighter are not working.
• 10231592Feb 7, 2023Brakes. This bulletin provides instructions for brake noise analysis and handling.
• 10231583Feb 6, 2023Visibility (wipers, defrost, mirrors). This bulletin provides instructions for when the washer solvent level warning is on in the DIS but the washer solvent level is correct.
• 10231575Feb 2, 2023Equipment. This bulletin provides instructions for when the Audi connect "User management" option is greyed out, or the SOS emergency button is red or flashing red.
• 10231078Jan 31, 2023Electrical system. This bulletin provides information on when the message "Instrument cluster: fault. Limited warning messages. Please contact workshop" DTC B200096 may be stored.
• 10231019Jan 26, 2023Equipment. Support for Customers Affected by Alternator Back-order
• 10230990Jan 26, 2023Equipment. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
• 10230988Jan 26, 2023Equipment, Body and structure. This bulletin provides instructions when the black optic exterior trim is discolored.
• 10230967Jan 26, 2023Equipment. This bulletin provides instructions for when "Gearbox Malfunction" and/or vehicle does not shift up or down, and/or vehicle is in limp mode home, and/or "reverse gear is unavailable" displayed in the instrument cluster, and/or "You can continue driving (functions limited" with DTCs P071800 and/or P276800 and possible in combination with DTC P081100 and/or P081E00.
• 10231080Jan 25, 2023Back-over prevention (rear camera). This bulletin describes the steps to update the MIB3 software when applicable.
• 10231011Jan 24, 2023Visibility (wipers, defrost, mirrors). This bulletin provides instructions for when faint images appear on the windshield from the production sticker, or an image of the suction cups used to install the windshield in production.
• 10231016Jan 23, 2023Body and structure. This bulletin provides instructions for when the exterior trim has spots.
• 10230976Jan 20, 2023Vehicle speed control. This bulletin provides instructions for when a vibration is felt in the floor, seat, footwell, pedals or steering wheel while driving at highway speeds from 55 - 80 mph.
• 10230972Jan 20, 2023Equipment. This bulletin provides instructions for when the warning light for suspension illuminates in the instrument cluster.
• 10231069Jan 19, 2023Equipment. Support for Customers Affected by Alternator Back-order
• 10231061Jan 19, 2023Equipment. Support for Customers Affected by Alternator Back-order
• 10230844Jan 17, 2023Back-over prevention (rear camera). This bulletin provides instructions for when a customer states that after an over-the-air navigation map update the navigation system is permanently initializing or the navigation map is incomplete or corrupt and DTC B126CF0 and/or B126CF1 may be stored in the electronics control module.
• 10230646Jan 17, 2023Visibility (wipers, defrost, mirrors). This bulletin provides instructions for when the customer advises that there is insufficient or uneven cabin heating from the HVAC system.
• 10231029Jan 12, 2023Equipment. Support for Customers Affected by Alternator Back-order
• 10230790Jan 9, 2023Equipment. This bulletin advises that the MMI screen may freeze, or go blank and then restart when a special character like a symbol or emoticon is used in the name field for contact(s).
• 10230643Jan 9, 2023Visibility (wipers, defrost, mirrors). This bulletin provides instructions for when a customer reports concerns with the sunroof opening permeter seal is generating noise, dripping water, or if the seal is distorted and/or not flush with the roof panel.
• 10230850Jan 5, 2023Equipment. Support for Customers Affected by Alternator Back-order
• 10230641Jan 5, 2023Body and structure. This bulletin provides instruction for when a customer advises that a visible line of corrosion is forming in the roof.
• 10230640Jan 5, 2023Equipment. This bulletin contains instructions for when the zirconium inserts found to be not firmly attached during service work.
• 10230588Jan 3, 2023Engine cooling. This bulletin provides instructions for when there is a grinding/squeaking/tweeting noise coming from the engine compartment OR there is a message in the driver information system stating "Electrical system Malfunction! Please go to workshop". DTC P2BA300 may be stored.
• 10228815Dec 22, 2022Electrical system. Support for Customers Affected by Alternator Back-order
• 10228803Dec 19, 2022Equipment. SAFETY RECALLS, COMPLIANCE RECALLS and STOP SALES
• 10228787Dec 9, 2022Latches, locks and linkages. This technical service bulletin provides troubleshooting information for the vehicle locking system.
• 10228734Dec 1, 2022Electrical system. This bulletin provides directions for when there is a pixel fault in the instrument cluster.
• 10227166Nov 23, 2022Equipment. This bulletin advises to create a PSS record in instances where information in the MMI such as last destinations, favorites, and user defined buttons are lost.

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