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Service bulletin A6424002074791_1

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 id11007323
Published by NHTSA2024-09-06
Manufacturer's numberA6424002074791_1
Manufacturer's date2024-08-08
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

This bulletin provides information when the instrument cluster displays the warning "Child lock fault" with DTC B177901.

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

Trouble codes named

B1779

Vehicles listed
AUDI Q4 E-TRON2022
AUDI Q4 SPORTBACK E-TRON2022

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