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Service campaign C7171

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 id11022747
Published by NHTSA2025-09-05
Manufacturer's numberC7171
Manufacturer's date2025-08-15
Campaign id or software versionC7171
NHTSA componentENGINE

NHTSA's summary

This Warranty Field Campaign is being issued to address a potential concern for engine performance relative to the Wastegate Control System functionality on certain X15N engines. This field action authorizes certified repair locations to replace the Wastegate Control Block to the latest design and update the Engine Control Module calibration on eligible engines. This field action provides retroactive coverage for repairs made in anticipation of and prior to the release of this publication.

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 X15N

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