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Service bulletin A9421542064418_3

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 id10205972
Published by NHTSA2022-01-06
Manufacturer's numberA9421542064418_3
Manufacturer's date2021-12-15
NHTSA componentELECTRICAL SYSTEM; EXTERIOR LIGHTING

NHTSA's summary

This bulletin contains information for a turn signal or tail light warning lamp with DTC B16D4F4, B16D5F4, B16D6F4, and/or B16D7F4, along with instructions for handling such concerns.

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, Lighting

Trouble codes named

B16D4, B16D5, B16D6, B16D7

Vehicles listed
AUDI A82019, 2020
AUDI A82021 to 2022
AUDI A8 L E2021
AUDI A8 PHEV2022
AUDI S82019
AUDI S82020, 2021, 2022

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

Recalls for the same vehicles and component
20251672025-03-31. Lights And Instruments
25V2010002025-03-31. ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
23V8420002023-12-13. ELECTRICAL SYSTEM:PROPULSION SYSTEM:CHARGING:CABLE/CORD:ONBOARD

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

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.
TSB_2076396_32026-10-05. Service bulletin. This bulletin provides information regarding driver assist systems; Audi adaptive light, Audi pre sense system fault, adaptive cruise assist inop (DTC C12D5FA).
TSB_2074059_42026-10-05. Service bulletin. This bulletin provides general information about SOS Emergency Assist.
TSB_2068573_62026-10-05. Service bulletin. This bulletin provides information when the rear parking sensor sometimes does not work, rear parking sensor loose, rear parking sensor fault message.
TSB_2063336_52026-10-05. Service bulletin. This bulletin provides information when DTC C12BFF0 is stored in the lane change modeul or the radar sensor; intersection assist/lane change assist are inoperable.
TSB_2058077_112026-10-05. Service bulletin. This bulletin provides information when there is an Audi pressense warning, warning jolt, and/or brake engagement.
TSB_2054202_82026-10-05. Service bulletin. This bulletin provides information when there is an Audi adaptive light system malfunction; DTC C12B3FA is stored in the control module for driver assistance systems.
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.