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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: Equipment and accessories are shown. Show all

Bulletins, newest first
A9122322061625_42022-10-05. 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.
A2422602067937_12022-10-05. 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_12022-10-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin provides detailed instructions for diagnosis when DTC P0A7D00 is present.
A8722302067716_12022-09-01. 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.
A6422852020552112022-08-04. Service bulletin. VISIBILITY; EQUIPMENT. This bulletin provides instructions on how to properly clean exterior glass.
A5322052043016_32022-08-03. 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_22022-08-03. 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.
A9022732052299_52022-07-01. 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_92022-07-01. Service bulletin. EQUIPMENT. This bulletin states to create a PSS record when last destinations, favorites, and home/work addresses are sporadically lost.
A9122032061028_42022-07-01. 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.
A0022562066297_12022-07-01. Service bulletin. EQUIPMENT. This bulletin describes a reporting program for Audi certified technicians.
A4522262067132_12022-06-07. 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.
A9122942062266_82022-05-05. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin states to create a PSS record when last destinations, favorites, and home/work addresses are sporadically lost.
A9022592063038_22022-05-05. Service bulletin. EQUIPMENT:ELECTRICAL. This informational bulletin explains why the version information pops-up.
A9022572032113_62022-05-05. Service bulletin. EQUIPMENT:ELECTRICAL. This is an informational bulletin containing information about the outside temperature reading.
DC_202203292022-04-05. Service bulletin. EQUIPMENT. Dealer Communication: Vehicle Sales Reporting, Reinstatement, and Audit Policy
A9122932062266_72022-04-05. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin states to create a PSS record when last destinations, favorites, and home/work addresses are sporadically lost.
A9122922065728_22022-04-05. Service bulletin. EQUIPMENT. 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.
A9122902063702_42022-04-05. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin states to create a PSS when the MMI display turns blue. Workaround provided.
A9122892037809_92022-04-05. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This informational bulletin contains instructions about updating the navigation map.
A9022532066620_12022-04-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin advises that the message "CNG inspection" or "CNG mode active" with no relevant DTCs is currently being investigated. Techs should create a PSS record when this concern is reported by a customer.
A9122872066315_12022-04-05. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin describes a condition in which the USB ports may become damaged during use, and the procedure to repair.
A9122822064818_22022-04-05. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin contains repair instructions for when it is not possible to establish a bluetooth connection with DTC U110300.
A9122802059528_52022-03-04. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin contains ODIS instructions for DTC B200096 or B200000 with an SOS malfunction warning displayed in the instrument cluster.
A9022462052299_42022-03-04. Service bulletin. EQUIPMENT. This bulletin contains repair instructions for proper transport mode deactivation (DTC U142100, DTC P169A00, and U13EB00 ).

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.