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Service bulletin SP12-51B

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 id10096268
Published by NHTSA2017-03-23
Manufacturer's numberSP12-51B
Manufacturer's date2012-10-25
NHTSA componentENGINE

NHTSA's summary

THIS BULLETIN EXPLAINS HOW TO PIN OR REPLACE THE DOUBLE IDLER GEAR ON CERTAIN EPA2010 VEHICLES EQUIPPED WITH VOLVO D13 ENGINES IS NECESSARY. THE DOUBLE IDLER GEAR MUST BE REPAIRED ON ALL VEHICLES INVOLVED IN THIS SP BULLETIN.

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
VOLVO BUS 97002009 to 2011

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