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Service bulletin G0K_REGION LETTE

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 id10096849
Published by NHTSA2017-04-04
Manufacturer's numberG0K_REGION LETTE
Manufacturer's date2016-05-18
NHTSA componentENGINE

NHTSA's summary

REGION LETTER: THE SUBJECT VEHICLES MAY HAVE BEEN FILLED WITH AN IMPROPER CONCENTRATION OF COOLANT AND WATER. UNDER HIGH LOAD DRIVING CONDITIONS THIS COULD CAUSE THE HIGH ENGINE COOLANT TEMPERATURE WARNING LIGHT TO FLASH OR ILLUMINATE AND THE ENGINE TO OVERHEAT.

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 IA2016

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