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Service bulletin Circular 23DG

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 id10201474
Published by NHTSA2021-10-05
Manufacturer's numberCircular 23DG
Manufacturer's date2021-09-07
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

If the drain valve in the engine air intake hose becomes clogged with debris, it is possible that water may potentially enter the air intake system and affect the air filter, engine, turbocharger or intercooler in limited instances.

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

Engine

Vehicles listed
VOLKSWAGEN TOUAREG2015, 2016, 2017

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

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