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Service bulletin SB 446B

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 id10116258
Published by NHTSA2017-08-25
Manufacturer's numberSB 446B
Manufacturer's date2017-06-19
NHTSA componentEQUIPMENT:APPLIANCE:AIR CONDITIONER

NHTSA's summary

This Service Bulletin supercedes Service Bulletin 446 in its entirety and informs affected customers that model year 2011-2017 MCI J4500 model coaches may exhibit signs of premature wear or cracks in the A/C compressor support tube, which may cause the drive belt for the A/C compressor to fail or slip off the pulley, resulting in loss of function of the air conditioning, and that MCI will remedy the affected coaches at no cost to the customers.

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

Equipment and accessories, Heating and air conditioning

Vehicles listed
MCI J45002012 to 2017

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