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Service bulletin G0K-Dealer 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 id10142456
Published by NHTSA2018-07-02
Manufacturer's numberG0K-Dealer Lette
Manufacturer's date2016-05-19
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

Dealer 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

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
SCION IA2016

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