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Service bulletins for the 2021 Audi S4

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.

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

By type

By component

By trouble code

Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
TSB_2059891_92025-06-03. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the restricted function icon for Audi pre sense is displayed after engine starts.
TSB_2056019_42025-06-03. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the anti-theft alarm activates for no reason, or when the anti-theft alarm does not activate.
TSB_2060523_42025-05-03. Service bulletin. ELECTRICAL SYSTEM. This TSB provides MIB3 Software update instructions.
TSB_2077631_12025-05-03. Service bulletin. ELECTRICAL SYSTEM. This TSB provides information when the message "Engine/power nt start system: fault. Please contact workshop" appears; DTC B143C29.
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_2062115_142025-05-03. Service bulletin. ELECTRICAL SYSTEM. This bulliten provides information on reinstaling the navigation database.
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_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-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-2062115_132025-03-19. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides instructions on reinstalling the Navigation Database in vehcles with MiB3.
A5325102043016_42025-02-05. Service bulletin. ELECTRICAL SYSTEM. This TSB provides information when there are visible wires in the interior.
A9125072061028_62025-02-05. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there are no services in the MMI and the SOS LED does not turn green after PDI.
A9125062073134_22025-02-05. Service bulletin. ELECTRICAL SYSTEM. This Pending Service Solution (PSS) requests that technicans create a record in the PSS database when the function programmed to the star button on the multi-function steering wheel deletes itself.
A9625162061932_102025-02-05. Service bulletin. ELECTRICAL SYSTEM. This TSB provides information in instances when DTC U112300 is stored in one of two control modules.
A9125012062115_122025-02-05. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides instructions on reinstalling the Nav Database.
A9124972075322_32025-01-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides informaiton when there is an installation error with Audi connect.
A9124942065817_42025-01-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when Key User pariing is not possible, or the myAudi login cannot be completed in the vehicle.
A9124922068573_42025-01-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the rear parking sensor sometimes does not work, rear parking sensor loose, rear parking sensor fault message.
A9024582075217_22025-01-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the display of guages is faulty in Audi virtual cockpit.
A9024512064844_52025-01-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides informatino when the Audi virtual cockpit remains blank at startup.

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