WenmarOpen by Wenmar Pro

Service bulletins for the 2021 Audi A4 allroad

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.

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

By type

By component

By trouble code

Bulletins, newest first
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.
TSB_2079118_12025-09-04. Service bulletin. UNKNOWN OR OTHER. This bulletin provides tips for improving the robustness of the Bluetooth and CarPlay connection.
TSB_2073747_32025-09-04. Service bulletin. STRUCTURE:BODY. This bulletin provides information for when there are scratches or a coating on the cover of the instrument cluster, or there are particles or insects inside of the housing.

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