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Service bulletins for the 2020 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.

1073 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Bulletins, newest first
A4624552061403_22024-04-04. Service bulletin. SERVICE BRAKES, AIR:DISC:PADS; UNKNOWN OR OTHER. This bulletin provides information for when the brake pad wear indicator is on in the instrument cluster.
A4024752047920_92024-04-04. Service bulletin. STRUCTURE:FRAME AND MEMBERS:UNDERBODY SHIELDS; UNKNOWN OR OTHER. This bulletin provides information from the front end and dash panel are heard when the vehicle is moving.
A1924552061918_62024-04-04. Service bulletin. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY:THERMAL MANAGEMENT:FLUID/COOLANT; UNKNOWN OR OTHER. This bulletin provides information when the low coolant light is on but the coolant level is within specifications.
A9124772073135_12024-03-06. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This Pending Service Solution (PSS) requests that a record be added to the PSS database in instances where the radio favorites are lost, shortcuts are greyed out on lower screen with MIB3 vehicles.
A9124762073134_12024-03-06. Service bulletin. EQUIPMENT:ELECTRICAL. This Pending Service Solution (PSS) requests that technicians create a record in the PSS database in instances where the star button function assignment is lost on the multifunction steering wheel is lost sporadically.
A9124742069112_42024-03-06. Service bulletin. ELECTRICAL SYSTEM:ADAS:VIDEO MONITOR/SCREEN. This bulletin provides information on various improvements for MIB 3.
A5524892062669_32024-03-06. Service bulletin. STRUCTURE:BODY:HATCHBACK/LIFTGATE:SUPPORT DEVICE/STRUT; UNKNOWN OR OTHER. This bulletin provides information when there are noises coming from the trunk lid struts.
A3924582059057_72024-03-06. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). This bulletin provides information when quattro Ultra has vibrations or binding in tight turns.
A9124682072959_12024-03-06. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information for when Apple CarPlay pops up or takes over audio without user intervention in vehicles with the Audi Smartphone Interface.
A9124632044694_32024-03-06. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This bulletin provides information pertaining to MMI Navigation database concerns.
A4324812067531_32024-03-06. Service bulletin. SUSPENSION. This bulletin provides information when DTCs B200FF0, B200FF1, B200FF3, or B200FF4, B200FF5 are stored in the J775 suspension control unit.
A1924492061918_52024-03-06. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin provides information for when the low coolant light is illuminated but the coolant level is within specifications.
A9024742065960_32024-03-06. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin provides information for when the Audi virtual cockpit is distorted due to a broken screen.
441342202256372024-03-04. Service bulletin. SUSPENSION. Steering wheel shimmy, vibration and/or oscillation
A7024862044417102024-02-06. Service bulletin. UNKNOWN OR OTHER; STRUCTURE:BODY:ROOF AND PILLARS. This bulletin provides information for when there are noises from the headliner/sunroof area.
A9124602067021_52024-02-06. Service bulletin. EQUIPMENT:ELECTRICAL; AIR BAGS:SRS MALFUNCTION WARNING LAMP/LIGHT. This bulletin provides information for when there is a malfunction with the garage door opener, Sirius XM, Online radio, or other malfunctions; DTC B129B11, B129C22, B123C13, U044700, or B200000.
A9024722072065_22024-02-06. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin provides information when there are flickering lines in Audi virtual cockpit.
A1524462072713_12024-02-06. Service bulletin. POWER TRAIN. This bulletin provides service information on noises from the drivetrain duel-mass flywheel.
AUD4927ENG2024-01-22. Service bulletin. UNKNOWN OR OTHER. Due to new Minnesota state regulations regarding biofuels, biodiesel blends of B5 or less may not be available in the State of Minnesota.
A9123062024323102024-01-04. Service bulletin. ELECTRICAL SYSTEM:ADAS:PARKING ASSIST:SENSORS; ELECTRICAL SYSTEM:ADAS:PARKING ASSIST:SOFTWARE. This bulletin provides information when the parking assistance provides false warnings.
A1323222072511_12024-01-04. Service bulletin. POWER TRAIN; FUEL SYSTEM, OTHER:KINETIC:FLYWHEEL,BEARINGS. This bulletin provides service information when there are noises from the drivetrain, dual mass flywheel.
A0023822047812_72024-01-04. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This bulletin provides information on how to set up and use the SD Creator for obtaining vehicle software updates via the Mirror Server.
A9123542067843_32024-01-04. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This bulletin provides information when the configuration appears without apparent reason with MIB3.
A4723262055646_62024-01-04. Service bulletin. UNKNOWN OR OTHER; SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES. This bulletin provides information for when there is a hard brake pedal while attempting to start the vehicle.
A4523362072304_12024-01-04. Service bulletin. UNKNOWN OR OTHER; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT; ELECTRICAL SYSTEM:ADAS:HILL DESCENT ASSIST:SENSOR. This bulletin provides information for when the ABS/ESC speed sensor has an implausible signal.

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