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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_2071928_22025-05-03. Service bulletin. ELECTRICAL SYSTEM. This TSB provides informatio when, in MIB3, the MMI sidebar is missing.
TSB_2071281_32025-05-03. Service bulletin. ELECTRICAL SYSTEM. This TSB provides information when the warning "Fault: Limited warning messages" appears in the virtual cockpit; DTC B174404.
TSB_2012749_182025-05-03. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the exterior lights have moisture accumulation.
TSB_2071893_22025-05-03. Service bulletin. SEATS. This TSB provides damage assessment guidelines for textile seat covers.
TSB_2062115_142025-05-03. Service bulletin. ELECTRICAL SYSTEM. This bulliten provides information on reinstaling the navigation database.
TSB_2061922_42025-05-03. Service bulletin. VISIBILITY/WIPER. This TSB provides information on proper documentation for visual complaints regarding the headlights and taillights.
TSB_2059528_142025-05-03. Service bulletin. ELECTRICAL SYSTEM. This TSB provides information when there is an eCall fault/eCall LED is red with DTC B200000.
TSB_2077443_12025-04-04. Service bulletin. ELECTRICAL SYSTEM. This TSB provides information when convenience opening does not work.
TSB_2077364_12025-04-04. Service bulletin. ELECTRICAL SYSTEM. This TSB provides troubelshooting steps when the myAuid login can not be completed in the infotainment system
TSB_2077320_12025-04-04. Service bulletin. UNKNOWN OR OTHER. This TSB is a label placement guide as required by CARB for remanufactured parts.
TSB_2077204_12025-04-04. Service bulletin. ELECTRICAL SYSTEM. This bulleitn provides information regarding Over The Air automatic online map update complaints.
TSB_2077148_12025-04-04. Service bulletin. ELECTRICAL SYSTEM. This TSB provides information when home address, work address and favorites are deleted.
TSB_2075530_22025-04-04. Service bulletin. ENGINE. This bulletin provides informatin when the engine does not run smoothly at idling speeds.
TSB_2071185_22025-04-04. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information regarding various comlaints related to Apple CarPlay with Apple iOS devices.
TSB_2044417_132025-04-04. Service bulletin. STRUCTURE:BODY. This bulletin provides information about repiars for squeaks and rattles in the headliner.
TSB_2041717_132025-04-04. Service bulletin. VISIBILITY/WIPER. This bulletin provides information regarding the GFF test plan required for A/C compressr replaements regardless of the concern.
TSB_2038689_92025-04-04. Service bulletin. SUSPENSION. This bulletin provides information regaridng securting the bump stops when there are noises form the rear of the vehicle.
TSB_2018194_122025-04-04. Service bulletin. SUSPENSION. This bulletin serves as an assessment aid for shock absorber leaks.
SM 15-20252025-04-04. Other. LANE DEPARTURE: WARNING. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
TSB-2076404_32025-03-19. 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-2059528_132025-03-19. Service bulletin. ELECTRICAL SYSTEM. This TSB provides information when there is an eCall fault/eCall LED is red with DTC B200000.
TSB-2076945_12025-03-19. Service bulletin. STRUCTURE:BODY. This bulletin provides information about leather care and seat repair.
TSB-2062115_132025-03-19. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides instructions on reinstalling the Navigation Database in vehcles with MiB3.
TSB-2061904_62025-03-19. Service bulletin. STEERING. This TSB provides information when the warning message "Steering lock for active steering failed.
A5325102043016_42025-02-05. Service bulletin. ELECTRICAL SYSTEM. This TSB provides information when there are visible wires in the interior.

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