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Service bulletin S-TT-0098-15

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 id10096765
Published by NHTSA2017-03-31
Manufacturer's numberS-TT-0098-15
Manufacturer's date2015-09-30
NHTSA componentENGINE

NHTSA's summary

"TT: BASED ON CURRENT PART ORDER ALLOCATION, SOME PISTON TYPES HAVE BEEN INCORRECTLY IDENTIFIED WHILE UNDERGOING THE ZE7 2AZ OIL CONSUMPTION REPAIR PROCEDURE. REPLACEMENT PISTONS FOR ZE7 SHOULD BE ORDERED BASED ON THE PISTONS REMOVED FROM EXISTING CYLINDER BLOCK AND NO LONGER BY MEASUREMENT. THIS TECH TIP INCLUDES INFORMATION REGARDING PRODUCTION ALLOCATION AND INSTRUCTIONS FOR IDENTIFYING PISTON TYPE ON SUBJECT ENGINES. THIS WILL BE PUBLISHED IN THE NEXT REVISION OF S-SB-0024-11."

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
SCION TC2007 to 2010
SCION XB2008 to 2015

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