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Service bulletin TechTalk5448

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 id10182101
Published by NHTSA2020-11-04
Manufacturer's numberTechTalk5448
Manufacturer's date2020-10-29
NHTSA componentENGINE AND ENGINE COOLING; EQUIPMENT

NHTSA's summary

Tech talk discussion on DD8 reoccurring NOx issues.

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, Equipment and accessories

Vehicles listed
FREIGHTLINER BUSINESS CLASS M22019

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