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Service bulletin Cummins

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 id10203190
Published by NHTSA2021-11-08
Manufacturer's numberCummins
Manufacturer's date2021-09-24
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL

NHTSA's summary

This is a representative Owner Letter to communicate an emissions recall. The engine(s) are potentially eligible for an Emissions improvement campaign.

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, Exhaust and emissions

Vehicles listed
CUMMINS ISL G

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