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Service bulletin TIB-43-22

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 id10043166
Published by NHTSA2012-02-29
Manufacturer's numberTIB-43-22
Manufacturer's date2011-10-31
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM

NHTSA's summary

KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. BULLETIN REFERS TO THE DUAL EXHAUST REAR NOX SENSOR MOISTURE PROTECTION CAMPAIGN. TO DIVERT MOISTURE FROM THE REAR (SCR OUTLET) NOX SENSOR THERE IS A NEW DESIGN FOR EXHAUST ELEMENT. *PE

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine, Exhaust and emissions

Vehicles listed
KENWORTH C5002009 to 2011
KENWORTH T6602009 to 2011
KENWORTH T8002009 to 2011
KENWORTH W9002009 to 2011

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