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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

Only bulletins with component: Backup camera are shown. Show all

Bulletins, newest first
A9023532058077_82023-12-06. Service bulletin. SERVICE BRAKES; BACK OVER PREVENTION: WARNINGS. This bulletin provides information for when there is a warning, warning jolt and/or brake engagement with Audi pre sense.
A9023522059891_52023-12-06. Service bulletin. BACK OVER PREVENTION:DISPLAY FUNCTION. This bulletin provides information for the Audi pre sense restricted function icon displayed after the engine is started.
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.
A9023182065960_22023-04-06. Service bulletin. BACK OVER PREVENTION:DISPLAY FUNCTION. This bulletin provides information for when the virtual cockpit is distorted due a broken screen caused by outside influence.
A9023162064844_22023-04-06. Service bulletin. STRUCTURE:BODY:DOOR; BACK OVER PREVENTION:DISPLAY FUNCTION. This bulletin provides instructions for when the Audi virtual cockpit display remains blank when the driver's door is opened and the driver enters the vehicle. After the ignition is switched off and back on, the display may return to normal operation, but may also remain black.
A9023102059891_42023-04-06. Service bulletin. BACK OVER PREVENTION:DISPLAY FUNCTION; ELECTRICAL SYSTEM. This bulletin states that it takes about 20 seconds after switching the ignition on for the Audi Pre Sense symbol advising that "Audi pre sense not available at the moment"
A9123632060523_22023-02-07. Service bulletin. BACK OVER PREVENTION:SOFTWARE. This bulletin describes the steps to update the MIB3 software when applicable.
A9123612062115_92023-02-07. Service bulletin. BACK OVER PREVENTION:DISPLAY FUNCTION. This bulletin provides instructions for when a customer states that after an over-the-air navigation map update the navigation system is permanently initializing or the navigation map is incomplete or corrupt and DTC B126CF0 and/or B126CF1 may be stored in the electronics control module.

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