{"product_id":"engine-coolant-expansion-reservoir-overflow-tank-603-638-compatible-with-audi","title":"Engine Coolant Expansion Reservoir Overflow Tank 603-638 Compatible with Audi","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThis aftermarket engine coolant expansion reservoir overflow tank is designed as a replacement coolant storage component for Audi applications. Part number 603-638 identifies the supplied replacement part.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAftermarket engine coolant expansion reservoir overflow tank\u003c\/li\u003e\n\u003cli\u003eReplacement part for Audi applications\u003c\/li\u003e\n\u003cli\u003ePart number 603-638\u003c\/li\u003e\n\u003cli\u003eSupports the coolant expansion and overflow function of the vehicle cooling system\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility \u0026amp; Fitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eFor Audi\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eProduct Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eProduct Type: Engine coolant expansion reservoir overflow tank\u003c\/li\u003e\n\u003cli\u003ePart Number: 603-638\u003c\/li\u003e\n\u003cli\u003eApplication: Audi\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What is the normal purpose of this part? \u003cstrong\u003eA:\u003c\/strong\u003e The tank serves as an expansion and overflow reservoir within the vehicle cooling system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e How should fitment be verified before purchase? \u003cstrong\u003eA:\u003c\/strong\u003e Compare part number 603-638 and the complete vehicle model details with the existing part or vehicle records before ordering.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eThis is an aftermarket replacement part for the referenced application and is not represented as genuine or original equipment. Compatibility may vary by model, production date, serial number, or existing part number. Verify fitment before purchase.\u003c\/em\u003e\u003c\/p\u003e","brand":"RivetOak","offers":[{"title":"Default Title","offer_id":49126747963492,"sku":"LL1B15256","price":91.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0804\/6647\/7156\/files\/s-l1600_743f9037-cdc0-4eed-91b8-8a50d38cffc2.jpg?v=1789176784","url":"https:\/\/www.rivetoak.com\/products\/engine-coolant-expansion-reservoir-overflow-tank-603-638-compatible-with-audi","provider":"RivetOak","version":"1.0","type":"link"}