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Service bulletins for the 2021 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.

1057 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Bulletins, newest first
TSB_2047812_82025-11-08. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information on how to set up and use the FMC for obtaining vehicle software updates (SD Creator decomissioned).
TSB_2079293_12025-11-08. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the function programmed to star button on multi-function steering wheel deletes itself.
AVIN4APIN202510012025-11-08. Service bulletin. UNKNOWN OR OTHER. Summary of all Vin-4-Pin topics: Brake pulsation MIB3 takes a long time to load at startup Difficult to fuel, EVAP canister part block P001700 crank-cam correlation MIL on: DTC U041800 drive motor coolant and gear oil contamination PPE/PPC time off by 1 hour
TSB_2073917_22025-11-08. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information for when there is a fluid sample request from Product Support.
TSB_2053869_62025-11-08. Service bulletin. UNKNOWN OR OTHER. This bulletin addresses complaints about the heated steering wheel, DTC B145504.
TSB_2038689_102025-11-08. Service bulletin. SUSPENSION. This bulletin provides information when there are noises from the rear of vehicle - securing bump stops.
TSB_2079542_12025-10-03. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information when there is vibration/clacking/boomingnoises when driving due to foreign objects.
TSB_2079295_12025-10-03. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there is an installation error for Audi connect.
TSB_2079283_12025-10-03. Service bulletin. UNKNOWN OR OTHER. This bulletin provides sevice info regarding the bluetooth connection with an Apple iPhone.
TSB_2079214_12025-10-03. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides workshop information for fault findinga nd repair for the electric tailgate.
TSB_2076605_22025-10-03. Service bulletin. SUSPENSION. This TSB provides informaiton pertaining to noises from the guide link bush.
TSB_2076604_22025-10-03. Service bulletin. SUSPENSION. This bulletin provides information on locating noises coming from the suspension.
TSB_2076404_52025-10-03. Service bulletin. UNKNOWN OR OTHER. This bulletin provides a deployment overview for customer service packages MLB and MQB for MIB3/connectivity box/OCU3/LSR.
TSB_2075199_22025-10-03. Service bulletin. STEERING. This bulletin provides information when there is a prompt to take over steering; hands off detection.
TSB_2071264_22025-10-03. Service bulletin. ELECTRICAL SYSTEM. This bulleitn provides information whent here are complaints about route guidance with Navigation.
TSB_2066297_52025-10-03. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information related to the VIN-4-PIN Program.
TSB_2065978_52025-10-03. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information when the steering wheel does not heat up sufficiently.
TSB_2065234_22025-10-03. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there is a tail light warning and variois DTCs are stored in the comfort module; B16D431, B16D631, B16D531, and/or B16D731.
TSB_2064983_122025-10-03. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there is a pixel error (color ful line) in the Audi virtual cockpit.
TSB_2064077_82025-10-03. Service bulletin. STRUCTURE:BODY. This bulletin provides information when the air conditioning cooling output is insufficient; leak on air conditioning system evaporator.
TSB_2062633_52025-10-03. Service bulletin. STRUCTURE:BODY. This bulletin provides information when there is cracking/creaking noises during load changes or severe vehicle body torsion.
TSB_2062633_42025-10-03. Service bulletin. STRUCTURE:BODY. This bulletin provides information when there is cracking/creaking noises during load changes or severe vehicle body torsion.
TSB_2061461_142025-10-03. Service bulletin. POWER TRAIN. This bulletin provides information when the starter/generator drive belt is noisy or came off.
TSB_2060855_42025-10-03. Service bulletin. SUSPENSION. This bulletin provides information when there are rumbling noises from the suspension - upper link rubber mounting.
TSB_2041717_142025-10-03. Service bulletin. VISIBILITY/WIPER. This bujlletin provides information regarding the GFF test plan required for A/C compressor replacements regardless of the concern.

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