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Service bulletin TT 20 18 04

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 id10154079
Published by NHTSA2019-03-04
Manufacturer's numberTT 20 18 04
Manufacturer's date2018-12-07
NHTSA componentFUEL SYSTEM, GASOLINE

NHTSA's summary

Direction to address incorrect fueling.

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

Fuel system

Vehicles listed
VOLKSWAGEN VOLKSWAGEN

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