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
| A4722162055646_4 | 2022-09-01. Service bulletin. SERVICE BRAKES; ENGINE AND ENGINE COOLING. This bulletin contains repair instructions for when the vehicle sporadically does not start and there is a hard brake pedal concern. |
|---|---|
| A8722302067716_1 | 2022-09-01. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. This bulletin advises that techs should document the specific o-ring seal that is replaced if a refrigerant leak is found and caused by the o-ring seal. |
| A922230203815112 | 2022-08-04. Service bulletin. VISIBILITY:REAR WINDOW WIPER/WASHER. This bulletin provides instructions for repairing a vehicle with a washer solvent light on but the level is correct. |
| 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. |
| A3422592067653_1 | 2022-08-03. Service bulletin. POWER TRAIN. This bulletin provides instructions to address DTCs P071800, P276800, P071800, and P276800. |
| 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. |
| SM 47-2022 | 2022-07-01. Service bulletin. EQUIPMENT. This special notice is to inform dealers to return the parts listed if it meets the criteria provided. |
| A9722832067133_1 | 2022-07-01. Service bulletin. UNKNOWN OR OTHER; ELECTRONIC STABILITY CONTROL (ESC):CONTROL MODULE. This Pending service solutions requests that technicians create a PSS record for instances where a yellow check engine lamp is intermittently displayed upon start with DTC U014000or U110100 is sporadically stored. A software update is being developed; component replacement is not necessary. |
| 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. |
| A4722122055646_3 | 2022-07-01. Service bulletin. SERVICE BRAKES. This bulletin contains repair instructions for when the vehicle sporadically does not start and there is a hard brake pedal concern. |
| 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. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.