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Service bulletins for the 2020 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.

942 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Bulletins, newest first
A0024902074853_12024-09-06. Service bulletin. FUEL/PROPULSION SYSTEM. This bulletin provides service information ror when the fuel tank cannot be fully filled.
A9324042074808_12024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides service-info relating to lithium-ion high-voltage batteries; determining energy content.
A9224402065963_32024-09-06. Service bulletin. VISIBILITY/WIPER. This bulletin provides information on repairing the corrugated hose for the windshield washer system.
A9124462068573_32024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides informationw hen the parking aid sensor bracket(s) separates from the rear bumper.
A9124452059528_122024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there is an eCall fault / the eCall LED is red with DTC B200000.
A9124412060197_52024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there is an SOS emergency call malfunction; DTC B18BD11 or B18BD13 stored in the telematics control module
A9124392074855_12024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the calendar function is not available in MIB3.
A9124372060523_32024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides software update instructions for MIB3.
A9024192048926_102024-09-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there are various messages displayed; DTCs B200FF1 and/or B200FF2 stored in the camera control module.
A6024732063187_62024-09-06. Service bulletin. STRUCTURE:BODY. This bulletin provides information for checking the seal of the panoramic sunroomf due to wind noises or leaks.
A4424062074846_12024-09-06. Service bulletin. WHEELS. This bulletin provides information vibrations and rotational steering wheel vibrations.
A4424052074843_12024-09-06. Service bulletin. WHEELS. This bulletin provides information when there is a wheel/tire imbalance.
A3924702059057_112024-09-06. Service bulletin. POWER TRAIN. This bulletin provides informatin when there is binding or vibrations in tight turns with quattro Ultra.
A3924682074844_12024-09-06. Service bulletin. POWER TRAIN. This bulletin provides informiaotn in instances wehre whistling noises are heard at about 100 mph from the rear final drive/propshaft.
A3724222074826_12024-09-06. Service bulletin. POWER TRAIN. This bulletin offers information about the basic information needed for technical requests for gaerbox complaints.
A1924652070349_42024-09-06. Service bulletin. POWER TRAIN. This bulletin provides information when there is a loss of coolant from the coolant pump; V6 TFSI.
A0124342074976_12024-09-06. Service bulletin. FUEL/PROPULSION SYSTEM. This bulletin provides information when there are functional restrictions or driving behavior due to diesel detected in petrol.
A0024902074853_12024-09-06. Service bulletin. FUEL/PROPULSION SYSTEM. This bulletin provides service information ror when the fuel tank cannot be fully filled.
SM 42-20242024-08-06. Other. STEERING. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
SM 41-20242024-08-06. Other. ELECTRICAL SYSTEM. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
SM 40-20242024-08-06. Other. ELECTRICAL SYSTEM. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
SM 39-20242024-08-06. Other. ENGINE. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
A9124342072959_22024-08-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when Apple CarPlay pops up or takes over audio without user intervention.
A9124332067021_62024-08-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there are Garage opener/SXM/Online Radio or other malfunctions B129B11, B129C22, B123B13, B123C13, U044700 or B200000.
A9124322018187_162024-08-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides informaiton when there are speaker rattles, vibrations or audio interference in the sound system.

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