The Toyota Thermostat 90916-03121 is a genuine OEM part designed for regulating the engine temperature by controlling coolant flow. It is compatible with several Toyota models, including the Hilux (KZN165) from 1997-2005, Land Cruiser Prado, and Toyota 4Runner models equipped with the 1KZT and 1KZTE engines. It ensures optimal engine cooling and prevents overheating, making it an essential component for maintaining engine health .
For more details on compatibility, it is recommended to verify using your vehicle’s VIN number.