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.

• 11028405Jan 13, 2026Steering. This bulletin provides information about vibrations and rotational steering vibrations.
• 11028397Jan 5, 2026Electrical system. This bulletin provides information when the anti-theft alarm activates for no reason, or does not activate.
• 11027441Dec 19, 2025Electrical system. This bulletin provides informaiotn when the starter battery is discharged or defective.
• 11027439Dec 19, 2025Engine. This bulletin provides service information when there is dirt or a small amount of oil residue on the engine mounting.
• 11027438Dec 19, 2025Electrical system. This bulletin provides service infrmation for workshop mode with Audi connect vehicles.
• 11027436Dec 19, 2025Electrical system. This bulletin provides informaotin when the home address, work address, and favorites are deleted invehicles with MIB3.
• 11027372Dec 19, 2025Electrical system. This bulletin provides informatin when the convenience opening does not work.
• 11027376Dec 16, 2025Electrical system. This bulletin provides a osftware update for vehicles with MIB3, NAR Version ST37+LSR).
• 11027373Dec 16, 2025Other or unknown. This bulletin provides information on VIN Plates, Safety Certification labels, and the ordering procedures.
• 11027368Dec 11, 2025Electrical system. This bulletin provides information when the Emergency call LED in the roof module is not lit up green.
• 11027366Dec 11, 2025Fuel system. This bulletin provides information when the DTC P014800 or P008700 stored in ECM; Fuel System.
• 11027358Dec 11, 2025Transmission and drivetrain. This bulletin provides additoinal information to assist in determining the energy content of lithium-ion high-voltage batteries.
• 11027356Dec 11, 2025Engine. This bulletin provides information when there is increased oil consumption; >0.5ltr/1000 km.
• 11027350Dec 11, 2025Steering. This bulletin provides regarding visual damage for all vehicles.
• 11027323Dec 9, 2025Electrical system. This bulletin procides information when there is a pixel error in the Audi virtual cockpit.
• 11027321Dec 9, 2025Electrical system. This bulletin provides information when there are speaker rattles, vibrations, or audio interference.
• 11026208Nov 25, 2025Electrical system. This TSB provides information when the Emergency call SOS light has a fault, LED red; DTC B200000.
• 11026206Nov 25, 2025Engine. This special notice is to inform dealers to return the parts listed and only order the successor parts going forward.
• 11026228Nov 19, 2025Fuel system. This bulletin provides information when the DTC P014800 or P008700 stored in ECM; Fuel System.
• 11026211Nov 19, 2025Engine. This bulletin provides information when the starter/generator drive belt is noisy or came off; 2.0 ltr. Inline 4-cyl. TFSI.
• 11026241Nov 17, 2025Fuel system. This bulletin provides information when there is difficulty fueling, gas pump clicks off before the tank is full.
• 11026251Nov 11, 2025Electrical system. This bulletin povides ifnrmation when the image and sound cuts out, connection failures with iPhone 8/X/XR.
• 11026210Nov 11, 2025Electrical system. This bulletin provides infrormation when the Audi connect installation does not complete with MIB3.
• 11026229Nov 7, 2025Electrical system. This bulletin provides information when favorites, home address, and stored destinations are deleted; MIB CL32.
• 11025403Oct 30, 2025Electrical system. This bulletin provides information about the Audi pre sense warning, warning jolt and/or brake engagement.
• 11025363Oct 24, 2025Electrical system. This bulletin provides information when, with ConBox High, the Emergency call (SOS) fault/LED is red, with DTC B200000.
• 11025400Oct 22, 2025Suspension. This bulletin provides information parameter settings for suspension control unit J775.
• 11025369Oct 22, 2025Brakes. This bulletin provides information for all models regarding brake sounds.
• 11025368Oct 22, 2025Electrical system. This bulletin provides information when the steering wheel does not heat up sufficiently.
• 11025342Oct 21, 2025Brakes. This bulletin provides information regarding the general approach for all Audi vehicles regarding brake vibrations.
• 11025333Oct 21, 2025Brakes. This bulletin provides information on the zirconium insercts in the brake piston (ceramic brakes only).
• 11025330Oct 21, 2025Brakes. This bulletin provides information when there is corrosion on the friction survace of steel brake discs.
• 11025339Oct 20, 2025Wheels. This bulletin provides information when there is a wheel/tire imbalance.
• 11025405Oct 17, 2025Electrical system. This bulletinprovides information when DTCs B200FF0 to B200FF5 are stpredom the J775 suspension control unit.
• 11025357Oct 17, 2025Other or unknown. This bulletin provides information when tehre is a paint issue on alloy wheels.
• 11025355Oct 17, 2025Wheels. This bulletin provides information when there are whining noises at high speeds.
• 11025340Oct 17, 2025Steering. This TSB provides information regarding rotational and other steerihng wheel vibrations.
• 11025336Oct 17, 2025Brakes. This bulletin provides information when there is an ABS/ESC speed sensor implausible signal.
• 11025328Oct 17, 2025Wheels. This bulletin provides informaiont when the collapsible spare wheel does not fully inflate using the compressor from the vehicle's tool kit.
• 11025326Oct 17, 2025Wheels. This bulletin provides information about the steering wheel alignment.
• 11025323Oct 17, 2025Body and structure. This bulletin provides informaiton when the license plate mouting bracket threaded inserts are stripped.
• 11025322Oct 17, 2025Body and structure. This bulletin provides guidance for exterior glass cleaning.
• 11025286Oct 14, 2025Fuel system. This bulletin provides information when the DTC P014800 or P008700 stored in ECM; Fuel System.
• 11025266Oct 14, 2025Body and structure. This bulletin provides information when there is a complaint abou the easy-entry function.
• 11025293Oct 13, 2025Electrical system. This bulletin provides information when the Emergency call LED in the roof module is not lit up green.
• 11025281Oct 7, 2025Electrical system. This bulletin provides an MMI software update for MIB3 vehicles.
• 11025270Oct 7, 2025Electrical system. This bulletin provides information when there is a warning in the instrument cluster: "Instrument cluster: fault. Limited warning messages. Please contact workshop" - B200096.
• 11025269Oct 7, 2025Electrical system. Ths is bulletin provides information when favorites, home address and stored destinations are deleted with MIB3.
• 11025267Oct 7, 2025Electrical system. This TSB provides information when the USB socket is loose, missing, pushed in.
• 11025265Oct 7, 2025Electrical system. This TSB provides MIB3 Software update instructions.

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