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Service bulletin 12TS16

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 id10129720
Published by NHTSA2018-03-05
Manufacturer's number12TS16
Manufacturer's date2012-08-13
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM; FUEL SYSTEM, DIESEL

NHTSA's summary

12TS16 EPA10 Diesel Exhaust Fluid (DEF) Metering Unit Air Supply Contamination

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, Fuel system

Vehicles listed
FCCC FCCC
FREIGHTLINER FREIGHTLINER
STERLING STERLING
THOMAS BUILT BUSES THOMAS BUILT BUSES
WESTERN STAR WESTERN STAR

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