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Service bulletins for the 2020 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.

1073 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Bulletins, newest first
A4824722028220_122024-10-28. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information regarding steering wheel visual damage.
A4624592069078_22024-10-28. Service bulletin. SERVICE BRAKES. This bulletin provides informaion regarding zirconium inserts in the bake piston for vehicle equipped with ceramic brakes.
A4624572051095_92024-10-28. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information on frequency analysis.
A4524492075120_12024-10-28. Service bulletin. SERVICE BRAKES. This bulletin provides information regarding the general approach to brakes rubbing.
A4524462072304_22024-10-28. Service bulletin. ELECTRICAL SYSTEM. This bulleitn provides information when there is an implausible signal in the ABS/ESC speed sensor.
A4424082074846_22024-10-28. Service bulletin. STEERING. This bulletin provides information when there are vibrations and rotational steering wheel vibrations.
A4324972051336_82024-10-28. Service bulletin. SUSPENSION. This bulletin provides information when DTC B2200FF is stored in the J775.
A4324932059665_62024-10-28. Service bulletin. SUSPENSION. This bulletin provides information parameter settings for suspension control unit J775.
A4024812060855_22024-10-28. Service bulletin. SUSPENSION. This bulletin provides information when there are rumbling noises from the suspension - upper link rubber mounting.
A2424632074810_22024-10-28. Service bulletin. ENGINE. This bulletin provides information when ther is an Engine: start/stop system fault shown and start/stop system not is working; mileage below 50 km/32 miles.
A0024932002047_132024-10-28. Service bulletin. UNKNOWN OR OTHER. This bulletin provides guidance in order to provid informaiton regarding preparatoin when calling the Audi Technical Assistnce Center (TAC).
A0024922031473_52024-10-28. Service bulletin. STRUCTURE:BODY. This bulletin provides informationw hen there are car was brush bristles trapped in the seam between the headlight and fender.
AVIN4APIN202408052024-09-06. Other. UNKNOWN OR OTHER. Summary of all Audi Vin4Pin topics in June Quatro Ultra vibrations MIB3 - Stuck on loading user information when booting up Airbag light on, DTCs B101704, B103604 Q5 Airbag light Roof panel buttons inop Airbag light B12251B front windows is noisy and/or binding Front door wind noise
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.

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