Genuine Toyota

The Genuine Toyota 90916-03129 is a direct replacement engine thermostat engineered to precisely regulate your vehicle's operating temperature by controlling coolant flow. A malfunctioning thermostat can lead to various issues, such as the engine overheating due to a stuck-closed valve or running too cool if the thermostat remains open. Other indicators of a failing unit include erratic temperature readings or coolant leaks around the thermostat housing. This thermostat is manufactured by Toyota to meet OE (Original Equipment) specifications for fit, form, and function. It is constructed with premium materials, including a stainless steel mounting flange for proper seating and a channel-constructed stainless steel spring frame for enhanced durability and strength. This ensures reliable performance and longevity. The 90916-03129 is compatible with a comprehensive list of Toyota and Lexus models, including various years of Avalon, Camry, Corolla, Highlander, Matrix, RAV4, Sienna, Solara, Tacoma, Venza, Yaris, and Scion models like the tC and xD. It also fits numerous Lexus vehicles such as the ES300, ES330, ES350, GS300, IS300, LS400, RX300, RX330, RX350, RX400h, RX450h, SC300, and SC400. It is advised to confirm compatibility using the specific part numbers or detailed vehicle fitment list before purchase.