Service bulletins for the 2021 Audi A4 allroad
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.
785 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
| A1524462072713_1 | 2024-02-06. Service bulletin. POWER TRAIN. This bulletin provides service information on noises from the drivetrain duel-mass flywheel. |
|---|---|
| AUD4927ENG | 2024-01-22. 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. |
| A912306202432310 | 2024-01-04. 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. |
| A7223522062113_5 | 2024-01-04. Service bulletin. SEATS. This bulletin provides information for when the rear backrest release in the luggage compartment is inoperative. |
| A1323222072511_1 | 2024-01-04. 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_7 | 2024-01-04. 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_3 | 2024-01-04. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This bulletin provides information when the configuration appears without apparent reason with MIB3. |
| A4723262055646_6 | 2024-01-04. 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_1 | 2024-01-04. 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. |
| A4223542038689_8 | 2024-01-04. Service bulletin. SUSPENSION:REAR; UNKNOWN OR OTHER. This bulletin provides information when there is a rattle noise from the rear suspension. |
| A3523472064312_5 | 2024-01-04. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); UNKNOWN OR OTHER. This bulletin provides information when the Gearbox warning is on, DTC P17F900 is stored in the TCM. |
| A3423662067653_5 | 2024-01-04. Service bulletin. EQUIPMENT:ELECTRICAL; UNKNOWN OR OTHER. This bulletin provides information for when there is a function restriction with event memory entry P071800 - P276800 (symptom 20736 - 20737). |
| A9023592069331_2 | 2024-01-04. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin provides information when there is a message in the instrument cluster: :Instrument cluster: fault. Limited warning messages. Please contact workshop"; B200096. |
| A7223512072225_1 | 2024-01-04. Service bulletin. SEATS. This bulletin requests that technicians create a record in the Pending Service Solutions database in instances where there is noise from the backrest of the front seat. |
| A0123022072273_1 | 2024-01-04. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information for when the MIL is on; one or more DTCs stored; P200400, P200600, P201400, P201500. |
| A9123512065728_6 | 2023-12-06. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM; COMMUNICATION:MANUFACTURER TELEMATICS. This bulletin provides information when the MMI screen is blank in MIB3 with Apple CarPlay. |
| A9123462064681_4 | 2023-12-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information for when the wireless charging does not work. |
| A9023572072065_1 | 2023-12-06. Service bulletin. ENGINE. This bulletin provides information when there are flickering lines in Audi virtual cockpit. |
| A9023562032113_8 | 2023-12-06. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin provides general information about the outside air temperature reading. |
| A9023532058077_8 | 2023-12-06. Service bulletin. SERVICE BRAKES; BACK OVER PREVENTION: WARNINGS. This bulletin provides information for when there is a warning, warning jolt and/or brake engagement with Audi pre sense. |
| A9023522059891_5 | 2023-12-06. Service bulletin. BACK OVER PREVENTION:DISPLAY FUNCTION. This bulletin provides information for the Audi pre sense restricted function icon displayed after the engine is started. |
| A6623042030471_7 | 2023-12-06. Service bulletin. STRUCTURE. This bulletin provides information for when the license plate mounting bracket threaded inserts are stripped. |
| A4723252055646_5 | 2023-12-06. Service bulletin. SERVICE BRAKES. This bulletin provides information regarding when the brake pedal is hard when attempting to start the vehicle. |
| A3423652070167_2 | 2023-12-06. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. This bulletin provides information for when the cooling oil valve fails basic settings after repair; DTC P1A5B00. |
| A2723622069747_5 | 2023-12-06. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. This bulletin provides information on document requirements before replacement of the vehicle 12 V battery when it is is drained. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.