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Service bulletin SB-3068

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 id10042891
Published by NHTSA2012-01-24
Manufacturer's numberSB-3068
Manufacturer's date2011-12-22
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)

NHTSA's summary

MOTOR COACH INDUSTRIES: ON SOME VEHICLES, THE EGR (EXHAUST GAS RECIRCULATION) HAS A POTENTIAL ISSUE ON CUMMINS ISX ENGINES COOLERS. AN OIL SAMPLE MUST BE TAKEN AND SENT FOR AN ANALYSIS TO CHECK FOR PRESENCE OF COOLANT ELEMENTS THAT COULD POSSIBLE DAMAGE ENGINES. NO MODEL YEARS LISTED. *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, Exhaust and emissions, EGR valve

Vehicles listed
CUMMINS ISX

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