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Service bulletin TIB-15-021

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 id10044145
Published by NHTSA2012-05-15
Manufacturer's numberTIB-15-021
Manufacturer's date2012-04-20
NHTSA componentSTEERING:LINKAGES:DRAG:LINK:CONNECTION

NHTSA's summary

KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. THE CHASSIS MAY NOT HAVE THE PROPER ASSEMBLY CONTROLS IN PLACE FOR DRAGLINK CONNECTIONS TORQUE. MODELS C500, K500, T660, T800 AND W900 2011-2012. *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

Steering, Tie rods and steering linkage

Vehicles listed
KENWORTH C5002011 to 2012
KENWORTH K5002011 to 2012
KENWORTH T6602011 to 2012
KENWORTH T8002011 to 2012
KENWORTH W9002011 to 2012

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