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Service bulletin CMI-032421-B

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 id10190745
Published by NHTSA2021-04-26
Manufacturer's numberCMI-032421-B
Manufacturer's date2021-03-24
NHTSA componentSTEERING; PARKING BRAKE; SERVICE BRAKES

NHTSA's summary

This is a representative communication from the Cummins producing plant to affected vehicle manfacturers regarding a potential issue with loose high pressure fuel lines on certain L9 engines. The engine plant pursued corrective action with affected OEMs at their facilities.

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

Brakes, Steering, Parking brake

Vehicles listed
CUMMINS L9

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