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
| A642285202055211 | 2022-08-04. Service bulletin. VISIBILITY; EQUIPMENT. This bulletin provides instructions on how to properly clean exterior glass. |
|---|---|
| A9222312067557_1 | 2022-08-04. Service bulletin. VISIBILITY:WINDSHIELD WIPER/WASHER. This bulletin advises that the window washer pump may become blocked due to frozen washer fluid; one more more DTCs may be present: DTCs B126101, B126111, or B126113. |
| A5322052043016_3 | 2022-08-03. Service bulletin. ELECTRICAL SYSTEM:PROPULSION SYSTEM: CABLES:FASTENER/CONNECTOR; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. This bulletin contains repair information for when there area cables visible in the passenger compartment of the vehicle. |
| A4822342065978_2 | 2022-08-03. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; STEERING:STEERING WHEEL /HANDLE BAR:HAND HEATER/COOLER. This bulletin explains that the steering wheel may warm up while being held leading to the impression that he steering wheel isn't heating evenly. |
| A6622882067558_1 | 2022-08-03. Service bulletin. VISIBILITY:REARVIEW MIRRORS/DEVICES. This bulletin advises to lubricate the exterior folding mirrors in instances when a noise is heard from the mirrors. |
| A4322652067531_1 | 2022-08-03. Service bulletin. ELECTRICAL SYSTEM; SUSPENSION:FRONT:SPRINGS:AIR SUSPENSION SYSTEM; SUSPENSION. This bulletin provides steps to address DTCs B200FF0, B200FF1, B200FF3, B200FF4, and B200FF5. |
| A4022452047920_6 | 2022-08-03. Service bulletin. SUSPENSION. The bulletin contains diagnosis information for noises on the front end of the vehicle. |
| A9022732052299_5 | 2022-07-01. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains repair instructions for proper transport mode deactivation (DTC U142100, DTC P169A00, and U13EB00 ). |
| A9122092062266_9 | 2022-07-01. Service bulletin. EQUIPMENT. This bulletin states to create a PSS record when last destinations, favorites, and home/work addresses are sporadically lost. |
| A9122032061028_4 | 2022-07-01. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin describes the registering and pairing process required to utilize the SIM card to activate 3rd generation Audi connect services. |
| A9022672059863_3 | 2022-07-01. Service bulletin. TIRES; WHEELS. This bulletin advises to ensure that the correct wheels and tires are installed in instances where the Audi pre sense restricted message appears in the absence of DTCs. |
| A4622332051095_7 | 2022-07-01. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM:SOFTWARE. This informational bulletin contains instructions on how to download and use the Audi Frequency App. |
| A462232203418121 | 2022-07-01. Service bulletin. SERVICE BRAKES. This technical service bulletin provides troubleshooting for brake noise. |
| A4322632051336_6 | 2022-07-01. Service bulletin. SUSPENSION; ELECTRICAL SYSTEM. This bulletin contains repair instructions for DTC B200FF0. |
| A4322582059665_3 | 2022-07-01. Service bulletin. SUSPENSION; ELECTRICAL SYSTEM. This bulletin contains a software update that corrects the control module configuration and addresses a warning light. |
| A0022562066297_1 | 2022-07-01. Service bulletin. EQUIPMENT. This bulletin describes a reporting program for Audi certified technicians. |
| A9022642059863_2 | 2022-06-07. Service bulletin. WHEELS; TIRES. This bulletin advises to ensure that the correct wheels and tires are installed in instances where the Audi pre sense restricted message appears in the absence of DTCs. |
| A4522262067132_1 | 2022-06-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin contains instructions for when the message "Audi pre sense currently restricted. See owner's manual" is displayed in the instrument cluster without DTCs. |
| A4722112067117_1 | 2022-06-07. Service bulletin. SERVICE BRAKES. This bulletin states that moisture has been identified on one of the rear brake calipers; this fluid is from the production process of the components and does not require repair. |
| A8722272041717_8 | 2022-06-07. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This informational bulletin details on how to get a GFF test plan for A/C compressor replacements. |
| A442292202256321 | 2022-06-07. Service bulletin. STEERING. This bulletin provides information regarding vibrations or movement that are felt in the wheel. |
| AWA 22-05 | 2022-05-05. Service bulletin. FUEL SYSTEM, OTHER. This Document informs dealers on the new electric fuel pump warranty extension for 2018-2021 S4, S5, SQ5, Q8, A8, and Q7 vehicles |
| A3922472064024_2 | 2022-05-05. Service bulletin. ENGINE. This bulletin contains repair instructions for when there is an oil leak from the rear of the vehicle and the sealing caps are missing from the pressure limiting valves. |
| A4822312055733_3 | 2022-05-05. Service bulletin. STEERING. This bulletin contains repair instructions for repositioning the intermediate steering shaft when there is squeaking noises from the steering column. |
| A4822302061904_4 | 2022-05-05. Service bulletin. STEERING. This bulletin contains repair instruction for when DTC C110DF0 is stored and the yellow steering lamp is on. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.