{"product_id":"gates-23921-radiator-coolant-hose","title":"Gates 23921 Radiator Coolant Hose - Upper","description":"\u003ch2\u003eGates 23921 Molded Coolant Hose for BMW Z4\u003c\/h2\u003e\u003cp\u003eThe Gates 23921 molded coolant hose is a direct-fit radiator coolant hose for select 2003-2005 BMW Z4 models in the upper cooling circuit. Built from EPDM, plastic, and steel, it follows OEM-style routing and includes integrated modular components for a precise replacement.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFits 2003-2005 BMW Z4, upper\u003c\/li\u003e\n\u003cli\u003eMolded coolant hose built for the radiator cooling system\u003c\/li\u003e\n\u003cli\u003eOEM-style modular hose design with integrated components\u003c\/li\u003e\n\u003cli\u003eIncludes 3 quick-connect fittings and a bleeder valve\u003c\/li\u003e\n\u003cli\u003eConstructed from EPDM, plastic, and steel for application-specific fitment\u003c\/li\u003e\n\u003cli\u003eCenterline length: 10.25 in. (260 mm)\u003c\/li\u003e\n\u003cli\u003eEnd inside diameters: 1.534 in. (39 mm) and 1.531 in. (39 mm)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cp\u003eGates Molded Coolant Hose part number 23921 is engineered for specific vehicle applications and mirrors the layout of the original hose assembly, including essential integrated OE-style components such as quick-connectors and a bleeder valve. This makes it a strong choice for BMW Z4 upper radiator hose replacement when the original hose assembly needs to be restored to factory-style routing and connection points. Gates 23921 is also referenced under cross numbers such as Genuine 17127514404.\u003c\/p\u003e\u003ch2\u003eCommon Cooling System Issues It Can Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCracked or leaking upper radiator hose\u003c\/li\u003e\n\u003cli\u003eDamaged quick-connect fittings at the hose ends\u003c\/li\u003e\n\u003cli\u003eCoolant seepage at integrated connection points\u003c\/li\u003e\n\u003cli\u003eImproper hose routing from a worn molded assembly\u003c\/li\u003e\n\u003cli\u003eAir bleeding concerns related to a failing bleeder valve\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify the vehicle’s year, model, and upper hose routing before installation. Inspect mating connectors, clamps, and nearby cooling system components for wear or contamination before transferring the new hose into place. Confirm that the hose seats fully on the connection points and that the bleeder valve is positioned correctly for proper coolant service.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eGates is a recognized aftermarket supplier of modular coolant hose assemblies, and this part is manufactured to application-specific dimensions and OE-style requirements for the listed BMW Z4 fitment.\u003c\/p\u003e","brand":"Gates","offers":[{"title":"Default Title","offer_id":45310006788277,"sku":"BBSC-23921","price":50.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/ZO_23921_Top.jpg?v=1775146366","url":"https:\/\/www.partcatalog.com\/products\/gates-23921-radiator-coolant-hose","provider":"PartCatalog","version":"1.0","type":"link"}