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Service bulletin 20A4TECHREP420

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10174377
Published by NHTSA2020-05-07
Manufacturer's number20A4TECHREP420
Manufacturer's date2020-04-20
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

Audi connect Section: Moved to end of document. Post-Road Test Section: ADDED Steps: - Verify SOS button is green and Roadside assistance button LED will remain off - It may take up to 20 minutes for the emergency call system to activate (LED turns green) after flight/transport mode deactivation - The vehicle must not be delivered to the customer if the emergency call function has not been successfully activated (LED lights up in green)

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system

Vehicles listed
AUDI A42020
AUDI S42020

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
TSB_2079214_42026-10-05. Service bulletin. This bulletin provides information regarding fault finding and repair information for electric tailgate.
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TSB_2082977_12026-09-04. Service bulletin. This bulletin provides informaiton when the airbag warning lamp is active, event memory "B200000 - Faulty control module, symptom 305".
TSB_2082976_22026-09-04. Service bulletin. This bulletin provides general information about the current tpp issues for Audi connect.
TSB_2082976_12026-09-04. Service bulletin. This bulletin provides general information about the current tpp issues for Audi connect.
TSB_2069331_82026-09-04. Service bulletin. This bulletin provides informaitn when there is a warning messsage; "Instrument cluster: fault. Limited warning messages. Please contact workshop"; DTC B200096.
TSB_2064681_62026-09-04. Service bulletin. This bulletin provides information when there is an issue with wireless charging/wireless charging is not working.
TSB_2073747_42026-08-05. Service bulletin. This bulletin provides informatoinw hent here are scratches or a coating on the cover of the instrument cluster, or particles inside of the housing.
TSB_2069596_32026-08-05. Service bulletin. This bulletin provides information when the pop-up for massage functions does not appear.
TSB_2069331_72026-07-07. Service bulletin. This bulletin provides informaitn when there is a warning messsage; "Instrument cluster: fault. Limited warning messages. Please contact workshop"; DTC B200096.