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Service bulletin SBT49-008

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 id10225494
Published by NHTSA2022-11-02
Manufacturer's numberSBT49-008
Manufacturer's date2022-10-27
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

Thomas Built Buses Service Bulletin for DEF Connector Reinforcement Caps. Some customers experience separation of the diesel exhaust fluid (DEF) lines from the connection ports in extreme cold temperatures. To prevent this, a process was developed to secure the lines with wire ties. A new reinforcement cap has been developed to simplify this process at the DEF connection fittings.

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

Vehicles listed
THOMAS BUILT BUSES SAF-T-LINER C22014 to 2023

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