WenmarOpen by Wenmar Pro

Service bulletin C1634C

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 id10078464
Published by NHTSA2016-08-08
Manufacturer's numberC1634C
Manufacturer's date2016-02-02
NHTSA componentEQUIPMENT

NHTSA's summary

THIS CAMPAIGN IS BEING ISSUED TO ADDRESS TURBOCHARGER ACTUATOR FAILURES IN CERTAIN ENGINES IN TRANSIT BUS APPLICATIONS. THIS CAMPAIGN AUTHORIZES THE RECALIBRATION OF THE TURBOCHARGER ACTUATOR. THIS IS AN UPDATE TO A PREVIOUSLY RELEASED COMMUNICATION.

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

Equipment and accessories

Vehicles listed
CUMMINS ISB6.7
CUMMINS ISL9

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