This is a genuine TOYOTA thermostat, part number 90916T2023, which is a direct replacement for part number 90916-T2021. It is engineered to precise specifications to ensure accurate engine temperature regulation. Proper engine temperature is crucial for fuel efficiency, emissions control, and the longevity of your engine. A malfunctioning thermostat can lead to overheating or undercooling, both of which can cause significant damage and reduce performance. This TOYOTA thermostat is built to the same high standards as the original equipment, guaranteeing a perfect fit and reliable operation. By maintaining the correct operating temperature, this thermostat helps your engine perform at its peak, ensuring smooth operation and reducing wear and tear. It is an essential component of your vehicle's cooling system, working in conjunction with the radiator, coolant, and water pump to dissipate heat effectively.
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