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Service bulletin FSB 284-048

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 id10083538
Published by NHTSA2016-10-26
Manufacturer's numberFSB 284-048
Manufacturer's date2014-02-06
NHTSA componentENGINE

NHTSA's summary

SOME MACK VEHICLES WITH MP ENGINES BUILT BETWEEN JANUARY 2004 AND JANUARY 2013 MAY EXPERIENCE A MAIN OIL GALLERY PRESSURE SENSOR OR PISTON COOLING JET PRESSURE SENSOR FAILURE THAT LEADS TO OIL CONTAMINATION INTO THE ENGINE WIRE HARNESS.

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

Vehicles listed
MACK CHU2007 to 2014
MACK CXU2007 to 2014
MACK GU2008 to 2014
MACK LEU2007 to 2014
MACK MRU2007 to 2014
MACK TD2009 to 2014

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