Service bulletins for the 2021 Audi S4
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.
969 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
Only bulletins with component: Electrical system are shown. Show all
| A9324042074808_1 | 2024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides service-info relating to lithium-ion high-voltage batteries; determining energy content. |
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| A9124462068573_3 | 2024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides informationw hen the parking aid sensor bracket(s) separates from the rear bumper. |
| A9124452059528_12 | 2024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there is an eCall fault / the eCall LED is red with DTC B200000. |
| A9124392074855_1 | 2024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the calendar function is not available in MIB3. |
| A9124372060523_3 | 2024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides software update instructions for MIB3. |
| A9024252074975_1 | 2024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides informaion when there power and torque always display always shows 0% in the Audi virtual cockpit. |
| A9024192048926_10 | 2024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there are various messages displayed; DTCs B200FF1 and/or B200FF2 stored in the camera control module. |
| A9024182064983_9 | 2024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides informaion when the Audi virtual cockpit displays a colorful line (pixel error). |
| A9324042074808_1 | 2024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides service-info relating to lithium-ion high-voltage batteries; determining energy content. |
| A9124462068573_3 | 2024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides informationw hen the parking aid sensor bracket(s) separates from the rear bumper. |
| A9124452059528_12 | 2024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there is an eCall fault / the eCall LED is red with DTC B200000. |
| A9124392074855_1 | 2024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the calendar function is not available in MIB3. |
| A9124372060523_3 | 2024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides software update instructions for MIB3. |
| A9024252074975_1 | 2024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides informaion when there power and torque always display always shows 0% in the Audi virtual cockpit. |
| A9024192048926_10 | 2024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there are various messages displayed; DTCs B200FF1 and/or B200FF2 stored in the camera control module. |
| A9024182064983_9 | 2024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides informaion when the Audi virtual cockpit displays a colorful line (pixel error). |
| SM 41-2024 | 2024-08-06. Other. ELECTRICAL SYSTEM. This special notice is to inform dealers to return the parts listed if it meets the criteria provided. |
| SM 40-2024 | 2024-08-06. Other. ELECTRICAL SYSTEM. This special notice is to inform dealers to return the parts listed if it meets the criteria provided. |
| A9624002061932_8 | 2024-08-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides infrmation when the message "Audi Ative Lane Assist/Traffic Jam assist: malfunction!", DTC U112300 is stored. |
| A9124342072959_2 | 2024-08-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when Apple CarPlay pops up or takes over audio without user intervention. |
| A9124322018187_16 | 2024-08-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides informaiton when there are speaker rattles, vibrations or audio interference in the sound system. |
| A9124302059528_11 | 2024-08-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the ecall LED is red/ecall Fault, with DTC B200000. |
| A9024172059891_7 | 2024-08-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the restricted function icon for Audi pre sense is displayed after the engine starts. |
| A7224572074721_1 | 2024-08-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information about noises from the backrest of the front seat. |
| A5724532027368_6 | 2024-08-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the door handle touch sensors (Audi advanced key) inoperative. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.