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
| A9022842064983_5 | 2023-01-06. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin provides directions for when there is a pixel fault in the instrument cluster. |
|---|---|
| A9722892061976_3 | 2022-12-06. Service bulletin. ELECTRICAL SYSTEM:WIRING; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains guidance for submitting warranty wiring repairs. |
| A9122512062266_1 | 2022-12-06. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin advises to create a PSS record in instances where information in the MMI such as last destinations, favorites, and user defined buttons are lost. |
| A9122472062466_3 | 2022-12-06. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin describes the ways in which a variety of Audi vehicles connect to Apple Wireless CarPlay, and the methods to troubleshoot connection concerns. |
| A9122492059528_7 | 2022-12-06. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin provides directions when the SOS malfunction warning is displayed in the instrument cluster accompanied by DTC B200096 or DTCB200000. |
| A9122462065728_4 | 2022-12-06. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin describes an error which may arise due to a bug in the software of a customer's phone, which causes the Apple CarPlay screen to appear blank, and for audio drop-outs. |
| A9122452068435_1 | 2022-12-06. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT:BLUETOOTH/WIFI. This bulletin states that due to a software malfunction in Apple iOS Version 16.0.x there are restrictions with bluetooth connection. |
| A9122422065817_2 | 2022-12-06. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin provides troubleshooting tips for logging in to Audi Connect and Key User Pairing |
| A3922492059057_5 | 2022-12-06. Service bulletin. WHEELS. This bulletin contains repair instructions for noises when in reverse or vibrations/humming/droning or rubbing when fully turning the wheel. |
| A3422602067653_2 | 2022-12-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides instructions to address DTCs P071800, P276800, P071800, and P276800. |
| A9722882068037_2 | 2022-11-04. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin provides instructions on how to address DTC U014000, or DTC U110100. |
| A9122392062115_8 | 2022-11-04. Service bulletin. LANE DEPARTURE:LANE KEEP:NAVIGATION SYSTEM/SOFTWARE; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This bulletin contains instructions for when the nav files are corrupted during an update. |
| A2022502061461_5 | 2022-11-04. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin advises on the repair recommendation for a squeaking, grinding, or tweeting noise coming from the engine compartment. DTC P2BA300 may be stored. |
| A9622792061932_5 | 2022-10-05. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin provides information on how to properly address DTC U112300. |
| A9122322061625_4 | 2022-10-05. Service bulletin. EQUIPMENT:ELECTRICAL. The message "SOS Malfunction - Emergency call malfunction, please contact service" may appear erroneously in the presence of DTCs B129B11 and/or DTC B239C11. No repairs are necessary at this time. |
| A9122282059528_6 | 2022-10-05. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains ODIS instructions for DTC B200096 or B200000 with an SOS malfunction warning displayed in the instrument cluster. |
| A9722872068037_1 | 2022-10-05. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin provides instructions on how to address DTC U014000, or DTC U110100. |
| A9622782061932_4 | 2022-10-05. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin provides information on how to properly address DTC U112300. |
| A2422602067937_1 | 2022-10-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin offers further guidance regarding diagnosis and system information for vehicles with a 48 V electrical system. |
| A1722202067906_1 | 2022-10-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin provides detailed instructions for diagnosis when DTC P0A7D00 is present. |
| A9122232067843_1 | 2022-09-01. Service bulletin. ELECTRICAL SYSTEM. This bulletin advises that if the configuration wizard in the MMI displays upon startup, the customer can either complete the configuration or deactivate via settings. |
| A0022582045316_6 | 2022-09-01. Service bulletin. ELECTRICAL SYSTEM:IGNITION. This bulletin contains information for diagnosing the Start/Stop system. |
| A9022782064983_4 | 2022-09-01. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ELECTRICAL SYSTEM. This bulletin advises to replace the instrument cluster after providing photos in instances of a pixel fault in the virtual cockpit. |
| A5522702062669_2 | 2022-09-01. Service bulletin. STRUCTURE. This bulletin advises that noises from the trunk lid struts heard during operation are normal and no repair is required. |
| A462234203418122 | 2022-09-01. Service bulletin. SERVICE BRAKES. This technical service bulletin provides troubleshooting for brake noise. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.