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Service bulletin SF-437-A

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 id10042467
Published by NHTSA2011-12-08
Manufacturer's numberSF-437-A
Manufacturer's date2011-11-01
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM

NHTSA's summary

FREIGHTLINER (DAIMLER): AN INCORRECT DIESEL EXHAUST FLUID (DEF) COOLANT LINE MAY INTERFERE WITH NEARBY ENGINE MOUNT WAS ASSEMBLED ON CERTAIN VEHICLES AND NEED TO BE MODIFIED AND REPLACED. *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
FREIGHTLINER BUSINESS CLASS M22009 to 2010

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