{"product_id":"dorman-902-5003-engine-coolant-thermostat-housing","title":"Dorman 902-5003 Engine Coolant Thermostat Housing - Engine Block","description":"\u003ch2\u003eOverview of Dorman Engine Coolant Thermostat Housing\u003c\/h2\u003e\u003cp\u003eThe Dorman 902-5003 engine coolant thermostat housing is designed for reliable cooling system performance in select BMW models. Constructed from durable black plastic, this thermostat housing includes a gasket for a secure seal and is engineered to meet OEM specifications.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMaterial: High-quality black plastic for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eIncludes gasket for proper sealing\u003c\/li\u003e\n\u003cli\u003eOutlet port diameter: 1.5 inches\u003c\/li\u003e\n\u003cli\u003eFour mounting holes with 0.313 inch diameter each\u003c\/li\u003e\n\u003cli\u003eCompatible with multiple BMW models including 320i, 325i, M3, and Z3\u003c\/li\u003e\n\u003cli\u003eThermostat not included\u003c\/li\u003e\n\u003cli\u003eNo bolts or air vent (bleeder valve) included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Dorman 902-5003 thermostat housing is a direct replacement part designed specifically for BMW vehicles such as the 320i, 323i, 325i, 328i, 525i, M3, and Z3 models. Made from durable plastic, it offers resistance to corrosion and heat, ensuring long-lasting performance within the engine cooling system. The housing features a 1.5-inch outlet port diameter and four mounting holes sized at 0.313 inches, providing a secure and precise fit. This part comes with a gasket included to ensure a tight seal and prevent coolant leaks. Note that the thermostat itself is not included, and no bolts are provided with this housing.\u003c\/p\u003e\u003ch2\u003eCompatible BMW Models and Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBMW 320i, 323i, 323is, 323ti\u003c\/li\u003e\n\u003cli\u003eBMW 325i, 325is, 328i, 328is\u003c\/li\u003e\n\u003cli\u003eBMW 525i, 525iT\u003c\/li\u003e\n\u003cli\u003eBMW M3\u003c\/li\u003e\n\u003cli\u003eBMW Z3\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCommon Issues Addressed by This Thermostat Housing\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCoolant leaks caused by cracked or damaged thermostat housing\u003c\/li\u003e\n\u003cli\u003eOverheating due to improper coolant flow\u003c\/li\u003e\n\u003cli\u003eCorrosion-related failures in original housing components\u003c\/li\u003e\n\u003cli\u003eLoose or damaged mounting points affecting seal integrity\u003c\/li\u003e\n\u003cli\u003eReplacement of worn or brittle plastic housings\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure the engine is cool before beginning installation to avoid burns\u003c\/li\u003e\n\u003cli\u003eUse the included gasket to prevent coolant leaks and ensure a proper seal\u003c\/li\u003e\n\u003cli\u003eCheck mounting holes and hardware compatibility; bolts are not included\u003c\/li\u003e\n\u003cli\u003eInspect the thermostat separately as it is not included with this housing\u003c\/li\u003e\n\u003cli\u003eTorque mounting bolts to manufacturer specifications to avoid damage\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 902-5003 thermostat housing undergoes rigorous quality control to ensure durability and reliable performance in BMW cooling systems. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in material and workmanship.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":44324738826421,"sku":"BKKY-902-5003","price":40.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_9025003_Ang.jpg?v=1775011635","url":"https:\/\/www.partcatalog.com\/products\/dorman-902-5003-engine-coolant-thermostat-housing","provider":"PartCatalog","version":"1.0","type":"link"}