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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

Bulletins, newest first
A5724432027368_52024-06-25. Service bulletin. STRUCTURE:BODY. This bulletin provides information when the door handle touch sensors for Audi advanced key are inoperative.
A4024762047920_102024-06-25. Service bulletin. STRUCTURE:BODY. This bulletin provides information when there are noises from the front end and dash panel while the vehicle is in motion.
A1124002073917_12024-06-25. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information for when there is a fluid sample request from Product Support.
A0124232073867_12024-06-25. Service bulletin. ENGINE. This bulletin provides information when DTC U14A00 Terminal 30 is stored in the ECM.
A0024852021205_82024-06-25. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information on the ordering procedures for VIN Plates, and Safety Certification labels.
A9424792063739_22024-05-07. Service bulletin. EXTERIOR LIGHTING. This bulletin provides information when the headlights do not turn off during daylight hours.
AVin4Pin202404042024-05-07. Service bulletin. UNKNOWN OR OTHER. Noise from front door trim panel while driving Air suspension warning - DTC P089200 charge handle doesn't release vehicle will not charge Corrosion on wheelhouse cover plate P008700 - low fuel pressure P042000: Catalyst System,Bank1 Efficiency Below U060B00 - no com to G31 boost pressure sensor Airbag light on, DTCs B101704, B103604 Wind noise from front doors at highway speeds
AVin4Pin202404032024-05-07. Service bulletin. UNKNOWN OR OTHER. Noise from front door trim panel while driving Air suspension warning - DTC P089200 charge handle doesn't release vehicle will not charge Corrosion on wheelhouse cover plate P008700 - low fuel pressure P042000: Catalyst System,Bank1 Efficiency Below U060B00 - no com to G31 boost pressure sensor Airbag light on, DTCs B101704, B103604 Water intrusion from sunroof Wind noise from front doors at highway speeds
A9424762073332_22024-05-07. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information for when there is noise when steering.
A9124992073629_12024-05-07. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT:SOFTWARE; EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information when the Apple CarPlay connection is dropped repeatedly in short intervals.
A9124982073627_12024-05-07. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information when there is a wrong way driver warning in the MMI with MIB3.
A9024852073747_12024-05-06. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information when there are scratches, or a coating on the cover of the instrument cluster, or particles in the housing.
A9024842032113_92024-05-06. Service bulletin. UNKNOWN OR OTHER. This bulletin provides general information regarding outside air temperature readings.
A9024832059335_52024-05-06. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information when there is noise from around the instrument cluster.
A7224542072225_22024-05-06. Service bulletin. UNKNOWN OR OTHER. This Pending Service Solution (PSS) requests that technicians enter a record into the PSS Database in instances where there is noise from the backrest of the front seat.
A9124942073582_12024-05-06. Service bulletin. UNKNOWN OR OTHER. This bulletin provides general troubleshooting for connection complaints related to Apple CarPlay.
A9124932059528_82024-05-06. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information when the DTC B200096 or B200000 is stored in the telematics control module; ConBox High.
A9124902073135_22024-05-06. Service bulletin. UNKNOWN OR OTHER. This Pending Service Solution (PSS) requests that technicians create a PSS Database record in instances where the radio favorites are lost/shortcuts are greyed out in vehicles with MIB3.
A5724342017082_12024-05-06. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information when the remote control key is inoperative.
A3924602059057_82024-05-06. Service bulletin. POWER TRAIN. This bulletin provides information when there is binding or vibrations in tight turns in vehicles equipped with quattro Ultra.
A2724712067906_52024-05-06. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information for when DTC P0A7D00 is stored.
SM 19-20242024-04-05. Service bulletin. EQUIPMENT. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
A9424732012749172024-04-05. Service bulletin. EXTERIOR LIGHTING; UNKNOWN OR OTHER. This bulletin provides information when the exterior lights have moisture accumulation.
AVIN4PIN202403052024-04-05. Service bulletin. EQUIPMENT:ELECTRICAL; UNKNOWN OR OTHER; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:ENGINE COOLANT HOSES AND FITTINGS; STRUCTURE:BODY:DOOR. Noise from front door trim panel while driving Low coolant warning in cluster, coolant level is correct Front window inoperative Air suspension warning - DTC P089200 charge handle doesn't release vehicle will not charge Temp sensor DTC P218500 Corrosion on wheelhouse cover plate P008700 - low fuel pressure P042000: Catalyst System, Bank1 Efficiency Below
A9124892069112_52024-04-04. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin provides information on various improvements for MIB 3.

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