WenmarOpen by Wenmar Pro

Service bulletin A9420242050234_4

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 id10174051
Published by NHTSA2020-05-07
Manufacturer's numberA9420242050234_4
Manufacturer's date2020-04-21
NHTSA componentEXTERIOR LIGHTING

NHTSA's summary

This bulletin contains repair instructions regarding when the rear lights do not switch from bumper to hatchgate after closing with DTC B146C29.

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

Lighting

Trouble codes named

B146C

Vehicles listed
AUDI Q52018, 2019, 2020

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
A9424792063739_22024-05-07. Service bulletin. This bulletin provides information when the headlights do not turn off during daylight hours.
A9424782070694_22024-05-07. Service bulletin. This bulletin provides information when there is a functional issue with the lights in the rear lid; B146C29.
A9424732012749172024-04-05. Service bulletin. This bulletin provides information when the exterior lights have moisture accumulation.
A9424722073282_12024-04-04. Service bulletin. This bulletin provides information on visual concerns with the headlight lens.
A9423672071954_12023-11-06. Service bulletin. This bulletin provides information pertaining to when there are foreign objects inside of a headlight or taillight.
A9423652061922_32023-07-10. Service bulletin. This bulletin provides detailed information on the proper documentation of optical concerns for headlights and taillights.
A0023692031473_42023-06-06. Service bulletin. This bulletin provides information for when car wash bristles become stuck in the body gap between the headlight and fender.
A9423632061922_22023-06-06. Service bulletin. This bulletin provides details on how to properly document optical concerns in headlights and taillights for warranty submissions.
A9423642012749162023-06-06. Service bulletin. This bulletin provides information for when there is moisture accumulation in the exterior lights.
A9421512063766_22021-12-07. Service bulletin. This bulletin contains repair instructions for DTC B12CB15 and/or B12CC15 with a tail warning lamp.