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
| TSB_2060750_5 | 2026-02-06. Service bulletin. ENGINE. This bulletin provides information regarding UV leak additive for finding oil leaks. |
|---|---|
| TSB_2056019_5 | 2026-02-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the anti-theft alarm activates for no reason, or does not activate. |
| TSB_2080517_1 | 2026-01-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides informaiotn when the starter battery is discharged or defective. |
| TSB_2080494_1 | 2026-01-07. Service bulletin. ENGINE. This bulletin provides service information when there is dirt or a small amount of oil residue on the engine mounting. |
| TSB_2061669_3 | 2026-01-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides service infrmation for workshop mode with Audi connect vehicles. |
| TSB_2077148_2 | 2026-01-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides informaotin when the home address, work address, and favorites are deleted invehicles with MIB3. |
| TSB_2079133_3 | 2026-01-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides a osftware update for vehicles with MIB3, NAR Version ST37+LSR). |
| TSB_2021205_9 | 2026-01-07. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information on VIN Plates, Safety Certification labels, and the ordering procedures. |
| TSB_2077443_2 | 2026-01-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides informatin when the convenience opening does not work. |
| TSB_2079652_2 | 2026-01-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the Emergency call LED in the roof module is not lit up green. |
| TSB_2079461_3 | 2026-01-07. Service bulletin. FUEL/PROPULSION SYSTEM. This bulletin provides information when the DTC P014800 or P008700 stored in ECM; Fuel System. |
| TSB_2074808_3 | 2026-01-07. Service bulletin. POWER TRAIN. This bulletin provides additoinal information to assist in determining the energy content of lithium-ion high-voltage batteries. |
| TSB_2074640_2 | 2026-01-07. Service bulletin. ENGINE. This bulletin provides information when there is increased oil consumption; >0.5ltr/1000 km. |
| TSB_2028220_13 | 2026-01-07. Service bulletin. STEERING. This bulletin provides regarding visual damage for all vehicles. |
| TSB_2064983_13 | 2026-01-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin procides information when there is a pixel error in the Audi virtual cockpit. |
| TSB_2018187_18 | 2026-01-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there are speaker rattles, vibrations, or audio interference. |
| TSB_2079920_1 | 2025-12-05. Service bulletin. ELECTRICAL SYSTEM. This bulletin povides ifnrmation when the image and sound cuts out, connection failures with iPhone 8/X/XR. |
| TSB_2079903_1 | 2025-12-05. Service bulletin. FUEL/PROPULSION SYSTEM. This bulletin provides information when there is difficulty fueling, gas pump clicks off before the tank is full. |
| TSB_2079619_1 | 2025-12-05. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when favorites, home address, and stored destinations are deleted; MIB CL32. |
| TSB_2079461_2 | 2025-12-05. Service bulletin. FUEL/PROPULSION SYSTEM. This bulletin provides information when the DTC P014800 or P008700 stored in ECM; Fuel System. |
| TSB_2061461_15 | 2025-12-05. Service bulletin. ENGINE. This bulletin provides information when the starter/generator drive belt is noisy or came off; 2.0 ltr. Inline 4-cyl. TFSI. |
| TSB_2061257_4 | 2025-12-05. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides infrormation when the Audi connect installation does not complete with MIB3. |
| TSB_2059528_17 | 2025-12-05. Service bulletin. ELECTRICAL SYSTEM. This TSB provides information when the Emergency call SOS light has a fault, LED red; DTC B200000. |
| SM 63-2025 | 2025-12-05. Other. ENGINE. This special notice is to inform dealers to return the parts listed and only order the successor parts going forward. |
| TSB_2067531_7 | 2025-11-08. Service bulletin. ELECTRICAL SYSTEM. This bulletinprovides information when DTCs B200FF0 to B200FF5 are stpredom the J775 suspension control unit. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.