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Service bulletin TT 13 18 01

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 id10149850
Published by NHTSA2018-12-03
Manufacturer's numberTT 13 18 01
Manufacturer's date2018-08-31
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV); ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS

NHTSA's summary

Diagnostic checks and repair direction for chirping noise.

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, Exhaust and emissions, Crankcase ventilation (PCV), Drive belts

Vehicles listed
VOLKSWAGEN GTI2015
VOLKSWAGEN GTI2016 to 2018

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
TT 27-13-012017-10-31. Service bulletin. Tech Tips: Generator Charging Concern Diagnosis Tip - One Way Clutch Pulley Testing