Service bulletins for the 2021 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.
1057 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
| A8724932076287_1 | 2025-01-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the control functions in the vehicle are restricted. |
|---|---|
| A7224612076184_1 | 2025-01-07. Service bulletin. STRUCTURE:BODY. This bulletin provides information when the front seat makes creaking/squeaking noises. |
| A6624152046229_5 | 2025-01-07. Service bulletin. STRUCTURE:BODY. This bulletin provides informationw hen there are optical defects, scratches, and/or chrome peeling. |
| A5124322068999_3 | 2025-01-07. Service bulletin. STRUCTURE:BODY. This TSB provides information when there is cracked paintwork with corrosion at joint between roof and roof side member. |
| A4424092056386_10 | 2025-01-07. Service bulletin. WHEELS. This bulletin provides information regarding wheel alignment. |
| A4324012067531_6 | 2025-01-07. Service bulletin. SUSPENSION. This bulletin provides information when DTCs B200FF0 to B200FF5 stored in the J775 suspension control unit. |
| A3924762075681_2 | 2025-01-07. Service bulletin. POWER TRAIN. This bulettin provides information when droning noises/vibrations in tight corners is reported. |
| A3724292076084_1 | 2025-01-07. Service bulletin. POWER TRAIN. This TSB provides information when event memory entries cannot be deleted (Mode$0A error) on gearboxes: DL501, DL382/DL382E and DQ500. |
| A3524542064312_7 | 2025-01-07. Service bulletin. POWER TRAIN. This bulletin provides information when the Gearbox warning is on, DTC P17F900 is stored in the TCM. |
| A2724842074729_2 | 2025-01-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information in circumstances where there are noises/vibration from front of vehicle in dynamic mode. |
| A0124482014753_13 | 2025-01-07. Service bulletin. ENGINE. This bulletin provides information when the MIL is on; DTCs for misfire, air/fuel ratio imbalance, or lean fuel system stored in the ECM P030000. |
| A0024012076404_1 | 2025-01-07. Service bulletin. UNKNOWN OR OTHER. This TSB provides a deployment overview for customer service packages, MLB, and MQB for MIB3/connectivity box/OCU3/LSR. |
| A9624092076008_1 | 2024-12-04. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the camera for the Driver Assist Systems is coded incorrectly. |
| A9624072056019_3 | 2024-12-04. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the anti-theft alarm activates for no reason, or when the anti-theft alarm does not activate. |
| A9624062075891_1 | 2024-12-04. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when various camera-based driver assistance systems are unavailable (DTC B200FF2 (1123875)). |
| A9324342074808_2 | 2024-12-04. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides service-info relating to lithium-ion high-voltage batteries; determining energy content. |
| A9124872024323_11 | 2024-12-04. Service bulletin. ELECTRICAL SYSTEM. This TSB Provides information when parking assistance provides false warnings. |
| A9124842018187_17 | 2024-12-04. Service bulletin. STRUCTURE:BODY. This bulletin provides information when speaker rattles, vibrations, or audio interference is noted. |
| A9124782075537_2 | 2024-12-04. Service bulletin. ELECTRICAL SYSTEM. This TSB provides information when DTCs U142100 and U164200 are stored as passive/sporadic in the gateway. |
| A9024472059891_8 | 2024-12-04. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the restricted function icon for Audi Pre sense is displayed after engine starts. |
| A9024432059863_4 | 2024-12-04. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides informatoin when Audi pre sense restricted message appears in the instrument cluster, no DTCs. |
| A6424022020552_13 | 2024-12-04. Service bulletin. STRUCTURE:BODY. This bulletin provides information regarding cleaning exterior glass. |
| A5024152062633_3 | 2024-12-04. Service bulletin. STRUCTURE:BODY. This bulletin provides information when creaking noises are heard when body twists during braking or steering maneuvers. |
| A4324002067531_5 | 2024-12-04. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the DTCs B200FF0 to B200FF5 are stored in the J775 suspension control unit. |
| A0124462071243_3 | 2024-12-04. Service bulletin. ENGINE. This bulletin provides information when there are whistling noises from the turbo charge at 1500 - 2200 rpm and apprximately 70% load. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.