{"product_id":"motorad-973-221-engine-coolant-thermostat","title":"Motorad 973-221 Engine Coolant Thermostat","description":"\u003ch2\u003eEngine Coolant Thermostat Overview\u003c\/h2\u003e\u003cp\u003eThe Motorad 973-221 engine coolant thermostat is a standard replacement thermostat insert built to OE specifications. It is specified for 221°F operation and includes a housing seal for applications that call for it. This part is a fitment-based choice for Audi A3, Volkswagen Jetta, and related applications that use the same temperature rating.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eStandard engine coolant thermostat with OE-style construction\u003c\/li\u003e\n\u003cli\u003e221°F opening temperature for specified cooling system calibration\u003c\/li\u003e\n\u003cli\u003eO-ring seal design with rubber sealing material\u003c\/li\u003e\n\u003cli\u003eCopper, plastic, and stainless steel construction\u003c\/li\u003e\n\u003cli\u003eOffset design with air relief valve noted by the manufacturer\u003c\/li\u003e\n\u003cli\u003eIncludes thermostat insert and housing seal where applicable\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eMotorad manufactures the 973-221 using OEM-quality materials and OE supplier processes to match the temperature control requirements of the original cooling system. The copper case and wax compound are used to respond quickly to coolant temperature changes, while the offset design and air relief valve support proper coolant flow and system bleeding. This thermostat insert is listed for 2013-2018 Volkswagen Jetta, 2018-2019 Audi A3, and other confirmed applications in the fitment table. The 973-221 is also cross-referenced to Four Seasons 97321 and URO 04E121113F for the same application.\u003c\/p\u003e\u003ch2\u003eCommon Cooling System Issues It May Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEngine running cooler or warmer than specified\u003c\/li\u003e\n\u003cli\u003eDelayed coolant temperature regulation after startup\u003c\/li\u003e\n\u003cli\u003eTemperature fluctuation caused by a worn thermostat element\u003c\/li\u003e\n\u003cli\u003eSeal leakage at the thermostat housing interface\u003c\/li\u003e\n\u003cli\u003eCooling system performance concerns tied to incorrect thermostat opening temperature\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the OE-specified temperature and housing style before installation. This part is listed with a seal included, while bolts and installation tools are not included. Follow the vehicle service procedure for coolant draining, housing inspection, and proper seal seating. Confirm fitment against the exact application notes for Audi A3, Volkswagen Jetta, and other listed models before replacement.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eMotorad states that this thermostat is manufactured to OEM specifications and processes by an OE supplier, with materials selected to meet demanding automotive cooling system requirements.\u003c\/p\u003e","brand":"Motorad","offers":[{"title":"Default Title","offer_id":53716156317877,"sku":"BFNG-973-221","price":32.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/TZ_973221_Fro.jpg?v=1794033688","url":"https:\/\/www.partcatalog.com\/products\/motorad-973-221-engine-coolant-thermostat","provider":"PartCatalog","version":"1.0","type":"link"}