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
Only bulletins with component: Equipment and accessories are shown. Show all
| A9124992073629_1 | 2024-05-07. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT:SOFTWARE; EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information when the Apple CarPlay connection is dropped repeatedly in short intervals. |
|---|---|
| SM 19-2024 | 2024-04-05. Service bulletin. EQUIPMENT. This special notice is to inform dealers to return the parts listed if it meets the criteria provided. |
| A9124892069112_5 | 2024-04-04. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin provides information on various improvements for MIB 3. |
| A9124772073135_1 | 2024-03-06. 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_1 | 2024-03-06. 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. |
| A9124622072901_1 | 2024-03-06. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information when the wireless connection for the Audi Smartphone Interface drops out in specific areas. |
| A9124682072959_1 | 2024-03-06. 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. |
| A9124662071056_3 | 2024-03-06. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT:SOFTWARE; EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information for when Outlook contacts are not accessible via the MMI with Apple devices. |
| A9124632044694_3 | 2024-03-06. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This bulletin provides information pertaining to MMI Navigation database concerns. |
| A9024722072065_2 | 2024-02-06. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin provides information when there are flickering lines in Audi virtual cockpit. |
| 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). |
| A2023622069834_2 | 2023-12-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This repair authorization requests that technicians contact the Technical Assistance Center before proceeding when the MIL is illuminated, and DTC P04F000 is stored. |
| A9123432071056_2 | 2023-12-06. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information for when Outlook contacts are not accessible via the MMI when using Apple devices with MIB3. |
| A0023812070568_2 | 2023-12-06. Service bulletin. EQUIPMENT. This bulletin provides information on the VAS 611 015 PICO-NVH tool for professional noise analysis. |
| A9623882064285_2 | 2023-11-06. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin provides information for when the button for the rear dome light is stuck or inoperative. |
| A9123402071928_1 | 2023-11-06. Service bulletin. BACK OVER PREVENTION:DISPLAY FUNCTION; EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information for when the MMI sidebar is missing in MIB3. |
| A9023482071920_1 | 2023-11-06. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This bulletin advises that it is normal that certain navigation instructions are not displayed on the HUD. |
| A9023452064983_6 | 2023-11-06. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information for when the Virtual cockpit displays a colorful line (pixel error). |
| A7423262071893_1 | 2023-11-06. Service bulletin. EQUIPMENT:OTHER:LABELS. This bulletin provides damage assessment guidelines for textile seat covers. |
| A0023782066297_4 | 2023-11-06. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin provides information related to the VIN-4-PIN Program. |
| A0023762071721_1 | 2023-11-06. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin provides information for when unauthorized/unjustified DTC memory entries are captured in ODIS test Plans (Ghost faults). |
| A0023752066297_3 | 2023-11-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin provides details on the VIN-4-PIN program. |
| A0023742052680_4 | 2023-11-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin provides information on the additional reporting requirements for safety related inquiries. |
| A912330206211511 | 2023-10-05. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This bulletin provides information on reinstalling the navigation database when DTC B126CF0 and/or B126CF1 is stored in the 005F. |
| A2723592069747_4 | 2023-10-05. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin provides information for document requirements before replacing a 12v battery. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.