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Service bulletin WB09-01

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 id10044006
Published by NHTSA2012-05-04
Manufacturer's numberWB09-01
Manufacturer's date2009-03-01
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM

NHTSA's summary

PREVOST: COACHES EXHAUST SYSTEM UPDATE IN ORDER TO MODIFY EXHAUST FUMES PATH, INCREASE DIFFUSER PERFORMANCE AND REFLECT LATEST IMPROVEMENT. MODELS INCLUDE H3-41 AND H3-45 MODEL YEARS 2007-2009; MODEL X3-45 MODEL YEAR 2008. *JS

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
PREVOST H3-412007 to 2009
PREVOST H3-452007 to 2009
PREVOST X3-452008

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