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Service bulletin C1598

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 id10057511
Published by NHTSA2015-06-04
Manufacturer's numberC1598
Manufacturer's date2015-01-16
NHTSA componentENGINE

NHTSA's summary

CUMMINS: WARRANTY CAMPAIGN: ISB4.5 CM2350 B104 - CASTING POROSITY CAMPAIGN FOR VARIABLE GEOMETRY TURBOCHARGER ACTUATOR REQUIRES REPLACEMENT. *LJ

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine

Vehicles listed
CUMMINS ISB

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