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Service bulletin E257

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 id10171992
Published by NHTSA2020-03-04
Manufacturer's numberE257
Manufacturer's date2020-02-06
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

Information Only: Introducing OTA (over the air) software update capability for MX Engines.

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
PACCAR MX-11
PACCAR MX-112017
PACCAR MX-13
PACCAR MX-132017

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