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Service bulletin Update 42i1

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 id10149134
Published by NHTSA2018-11-26
Manufacturer's numberUpdate 42i1
Manufacturer's date2018-09-18
NHTSA componentPOWER TRAIN:AXLE ASSEMBLY

NHTSA's summary

UPDATE - Rear axles

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

Transmission and driveline, Axle

Vehicles listed
AUDI Q52018
AUDI SQ52018

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
Dealer letter -2018-11-26. Service bulletin. UPDATE - Rear axles