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Service bulletin MI18-21A

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 id10143990
Published by NHTSA2018-08-20
Manufacturer's numberMI18-21A
Manufacturer's date2018-07-10
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

This Maintenance Information presents information about the Bitzer A/C compressor oil change interval and reminds technicians to clean the oil filter/strainer and the magnetic drain plug.

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

Engine

Vehicles listed
PREVOST H32012 to 2013
PREVOST H3-412012 to 2016
PREVOST H3-412018
PREVOST H3-452012 to 2018
PREVOST H3-45 VIP2014 to 2018
PREVOST WE2012 to 2013
PREVOST X32012 to 2018
PREVOST X3VIP2014 to 2018

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