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Service bulletin PAB053-2021

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 id10201678
Published by NHTSA2021-09-29
Manufacturer's numberPAB053-2021
Manufacturer's date2021-09-27
NHTSA componentEQUIPMENT; ENGINE AND ENGINE COOLING

NHTSA's summary

TBB Product Awareness Bulletin for WEBASTO HEATERS WITH DETROIT DD5 ENGINE. Detroit DD5 engines have introduced improved performance in both fuel efficiency and active regens. Their efficient technology has made them ideal products for many customers. Thomas Built Buses recommends that Saf-T-Liner C2 orders configured with a Detroit diesel engine also include Webastofuel burning heaters in the cold climate domiciles listed below.

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, Equipment and accessories

Vehicles listed
THOMAS BUILT BUSES SAF-T-LINER C22022

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