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Service bulletin ITS-5536

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 id10054147
Published by NHTSA2013-12-26
Manufacturer's numberITS-5536
Manufacturer's date2013-12-26
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:DIESEL

NHTSA's summary

NEW FLYER: INFORMATION PROCEDURAL REGARDING EXHAUST FLEX CONNECTOR REPLACEMENT, IN BUSES, AND THE CLEANING , INSPECTION OF DIESEL PARTICULATE FILTER (DPF) AT VARIOUS INTERVALS. MODEL ISL, ISB. *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
CUMMINS ISB
CUMMINS ISL
NEW FLYER NEW FLYER

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