{"product_id":"dorman-902-5123xd-engine-coolant-thermostat-housing-assembly","title":"Dorman 902-5123XD Engine Coolant Thermostat Housing Assembly","description":"\u003ch2\u003eOE Fix Thermostat Housing for Toyota and Lexus\u003c\/h2\u003e\u003cp\u003eDorman 902-5123XD is an engine coolant thermostat housing assembly built for select Toyota and Lexus applications that use a plastic water outlet prone to warping from repeated heat cycling. This aluminum replacement includes the thermostat and gasket for a complete repair, helping restore proper coolant flow in one service.\u003c\/p\u003e\u003cp\u003eCompatible With 2004-2006 Lexus RX330 and 2004-2006 Toyota Sienna applications, including the 2004-2006 Toyota Sienna thermostat housing assembly with thermostat included. The Dorman 902-5123XD is a direct-fit cooling system repair part for drivers replacing a failed OE plastic housing.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAluminum housing construction for improved durability over the original plastic outlet\u003c\/li\u003e\n\u003cli\u003eIncludes thermostat and gasket for a complete thermostat housing repair\u003c\/li\u003e\n\u003cli\u003eStandard replacement grade for select Toyota and Lexus cooling system applications\u003c\/li\u003e\n\u003cli\u003eOne outlet port and one mounting hole design\u003c\/li\u003e\n\u003cli\u003eThermostat opening temperature: 82 Deg. C\u003c\/li\u003e\n\u003cli\u003eBlack and natural finish with aluminum and rubber materials\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis engine coolant thermostat housing assembly addresses a common failure point on select Toyota and Lexus vehicles where the original plastic water outlet can distort and leak after repeated temperature cycling. Dorman 902-5123XD replaces that housing with an aluminum OE FIX design and includes the thermostat and gasket needed to complete the repair. It is a practical choice for a 2004-2006 Lexus RX330 thermostat housing replacement or a 2004-2006 Toyota Sienna coolant outlet repair when the original part has warped, cracked, or begun leaking. This part cross-references Motorad (e.g., 281-180, CH2123) for the same application.\u003c\/p\u003e\u003ch2\u003eCommon Problems This Part Can Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCoolant leaks at the thermostat housing\u003c\/li\u003e\n\u003cli\u003eWarped or cracked plastic water outlet\u003c\/li\u003e\n\u003cli\u003eOverheating caused by restricted thermostat operation\u003c\/li\u003e\n\u003cli\u003eFailed gasket or seal at the housing interface\u003c\/li\u003e\n\u003cli\u003eRepeated thermostat housing replacement on the same vehicle\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eDrain the cooling system before removal, clean the mating surfaces thoroughly, and inspect the hose connection and surrounding coolant passages for residue or damage. Verify the thermostat orientation and gasket placement during installation, then refill and bleed the cooling system according to the vehicle service procedure. Confirm fitment for 2004-2006 Lexus RX330 and 2004-2006 Toyota Sienna before installation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDorman OE FIX parts are engineered as upgraded replacements for known failure points in original equipment designs. This aluminum thermostat housing assembly is built to replace the factory plastic outlet with a more durable service part for select Toyota and Lexus cooling system repairs.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":52787925287093,"sku":"BKKY-902-5123XD","price":62.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_9025123XD_Ang.jpg?v=1783752558","url":"https:\/\/www.partcatalog.com\/products\/dorman-902-5123xd-engine-coolant-thermostat-housing-assembly","provider":"PartCatalog","version":"1.0","type":"link"}