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Service campaign C7000

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 campaign
NHTSA id11020220
Published by NHTSA2025-07-07
Manufacturer's numberC7000
Manufacturer's date2025-06-05
Campaign id or software versionC7000
NHTSA componentENGINE

NHTSA's summary

This Warranty Field Campaign is being issued to address o-ring replacements at the air compressor coolant lines on certain X15 and X12 engines. This will prevent potential coolant leaks due to non-conforming o-ring material. Through this Campaign, it is authorized to repair applicable components at certified repair locations if all criteria are met in the Action section. This is an update to a previously submitted communication.

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
CUMMINS ISX12
CUMMINS ISX12N
CUMMINS X15

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