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Service bulletin TRP-1558

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 id10056755
Published by NHTSA2015-02-14
Manufacturer's numberTRP-1558
Manufacturer's date2014-08-29
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER

NHTSA's summary

CUMMINS: THE OIL SUPPLY LINE MALE CONNECTOR OF TURBOCHARGER IS BEING REPLACED DUE TO A MISMACHINED CAUSING REDUCED FLOW OF OIL TO TURBOCHARGER BEARING HOUSING. *PE

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, Turbocharger or supercharger

Vehicles listed
CUMMINS ISX

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