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Service bulletin MCI Field Notes

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 id10129950
Published by NHTSA2018-03-12
Manufacturer's numberMCI Field Notes
Manufacturer's date2018-02-02
NHTSA componentENGINE; ELECTRICAL SYSTEM

NHTSA's summary

This Service Advisory informs affected owners of model year 2012-2018 J4500 model coaches that the Fan Test Switch, in the remote JBox, in some instances has been accidentally turned on and left on, resulting in the engine running cool and inefficient for extended periods of time and that MCI has developed 2 interim options and that MCI will be cutting in as a standard, a switch cover. An exact VIN cut in number is currently in process.

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

Electrical system, Engine

Vehicles listed
MCI J45002012 to 2018

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