WenmarOpen by Wenmar Pro

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
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.
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.
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.
A9124772073135_12024-03-06. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This Pending Service Solution (PSS) requests that a record be added to the PSS database in instances where the radio favorites are lost, shortcuts are greyed out on lower screen with MIB3 vehicles.
A9124762073134_12024-03-06. Service bulletin. EQUIPMENT:ELECTRICAL. This Pending Service Solution (PSS) requests that technicians create a record in the PSS database in instances where the star button function assignment is lost on the multifunction steering wheel is lost sporadically.
A9124682072959_12024-03-06. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information for when Apple CarPlay pops up or takes over audio without user intervention in vehicles with the Audi Smartphone Interface.
A9124662071056_32024-03-06. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT:SOFTWARE; EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information for when Outlook contacts are not accessible via the MMI with Apple devices.
A9124632044694_32024-03-06. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This bulletin provides information pertaining to MMI Navigation database concerns.
A9024722072065_22024-02-06. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin provides information when there are flickering lines in Audi virtual cockpit.
AVIN4PIN202311102023-12-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Noise from front door trim panel while driving Noise from front door trim panel while driving Low coolant warning in cluster, coolant level is correct Check engine lamp is on, DTC (s) P010600, P023600, P023700, P023800 3.0L engine sound generator malfunctioning Fuel pressure low. DTC P008700 "Check engine lamp on, DTC P042000: Catalyst System,Bank1 Efficiency Below Front window inoperative Air suspension warning - DTC P089200 charge handle doesn't release vehicle will not charge Coolant leak from expansion tank noise from belt tensioner damper coolant reservoir cap broken Coolant pump leaking 48V BSG DTC U046900 / 36564: Invalid Data Received from Starter/Generator
AVIN4PIN202311202023-12-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Noise from front door trim panel while driving Noise from front door trim panel while driving Low coolant warning in cluster, coolant level is correct Check engine lamp is on, DTC (s) P010600, P023600, P023700, P023800 3.0L engine sound generator malfunctioning Fuel pressure low. DTC P008700 "Check engine lamp on, DTC P042000: Catalyst System,Bank1 Efficiency Below Front window inoperative Air suspension warning - DTC P089200 charge handle doesn't release vehicle will not charge Coolant leak from expansion tank noise from belt tensioner damper coolant reservoir cap broken Coolant pump leaking Wheel speed sensor DTC C101AF1;C101BF1;C101CF1;C101DF1
A9123432071056_22023-12-06. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information for when Outlook contacts are not accessible via the MMI when using Apple devices with MIB3.
A0023812070568_22023-12-06. Service bulletin. EQUIPMENT. This bulletin provides information on the VAS 611 015 PICO-NVH tool for professional noise analysis.
A9623882064285_22023-11-06. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin provides information for when the button for the rear dome light is stuck or inoperative.
A9123402071928_12023-11-06. Service bulletin. BACK OVER PREVENTION:DISPLAY FUNCTION; EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information for when the MMI sidebar is missing in MIB3.
A9023482071920_12023-11-06. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This bulletin advises that it is normal that certain navigation instructions are not displayed on the HUD.
A9023452064983_62023-11-06. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL:INFOTAINMENT. This bulletin provides information for when the Virtual cockpit displays a colorful line (pixel error).
A7423262071893_12023-11-06. Service bulletin. EQUIPMENT:OTHER:LABELS. This bulletin provides damage assessment guidelines for textile seat covers.
A0023782066297_42023-11-06. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin provides information related to the VIN-4-PIN Program.
A0023762071721_12023-11-06. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin provides information for when unauthorized/unjustified DTC memory entries are captured in ODIS test Plans (Ghost faults).
A0023752066297_32023-11-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin provides details on the VIN-4-PIN program.
A0023742052680_42023-11-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin provides information on the additional reporting requirements for safety related inquiries.
A9123302062115112023-10-05. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This bulletin provides information on reinstalling the navigation database when DTC B126CF0 and/or B126CF1 is stored in the 005F.
A2723592069747_42023-10-05. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin provides information for document requirements before replacing a 12v battery.

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