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Service bulletin DD-11M4

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 id10044790
Published by NHTSA2012-07-28
Manufacturer's numberDD-11M4
Manufacturer's date2012-07-27
NHTSA componentENGINE

NHTSA's summary

DETROIT DIESEL: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. THE FRONT ENGINE MOUNT BOLTS, ON SOME ENGINES, REQUIRES TIGHTENING TO PREVENT LOSS OF CLAMP LOAD BETWEEN CYLINDER BLOCK AND ENGINE MOUNT. *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

Vehicles listed
DETROIT DIESEL DETROIT

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