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Service bulletin L-TT-0188-15

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 id10134251
Published by NHTSA2018-04-23
Manufacturer's numberL-TT-0188-15
Manufacturer's date2015-09-30
NHTSA componentENGINE AND ENGINE COOLING

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 L-SB-0006-15.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
LEXUS HS 250 HYBRID2010 to 2012

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