{"product_id":"dayco-72743-radiator-coolant-hose","title":"Dayco 72743 Radiator Coolant Hose - Upper","description":"\u003ch2\u003eDayco 72743 Curved Radiator Hose Overview\u003c\/h2\u003e\u003cp\u003eDayco 72743 is a branched radiator coolant hose built for upper cooling system routing on select BMW applications. Formed from EPDM and finished in black, it is shaped to match the factory-style hose path and connection points used in the cooling circuit.\u003c\/p\u003e\u003cp\u003eCompatible with 2006-2010 BMW 525i, 525xi, 530i, 530xi, 528i, 528i xDrive, and 528xi upper radiator hose applications, this Dayco Curved Radiator Hose supports direct replacement service for the listed vehicles.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePart number: 72743\u003c\/li\u003e\n\u003cli\u003eDayco Curved Radiator Hose \/ branched hose design\u003c\/li\u003e\n\u003cli\u003eEPDM construction for cooling-system hose service\u003c\/li\u003e\n\u003cli\u003eBlack exterior finish\u003c\/li\u003e\n\u003cli\u003eEnd 1 inside diameter: 1 17\/32 in.; End 2 inside diameter: 1 17\/32 in.\u003c\/li\u003e\n\u003cli\u003eEnd 3 inside diameter: 3\/4 in.; End 4 inside diameter: 1\/2 in.\u003c\/li\u003e\n\u003cli\u003eSAE J20R4 Class D-1 and SAE J1684 Type EC specification listing\u003c\/li\u003e\n\u003cli\u003eNo heat shield and no protective sleeve\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cp\u003eDayco 72743 is engineered as a curved radiator hose with branched routing to match the upper coolant hose layout on the listed BMW models. The EPDM hose material is selected for standard coolant-system service, while the molded shape helps maintain the correct routing between the radiator and engine-side connections. This part cross-references BMW 17.12.7.546.064 and Gates 24332 for the same application.\u003c\/p\u003e\u003cp\u003eUse Dayco 72743 when replacing a worn, cracked, swollen, or leaking upper radiator hose on a BMW 525i, 530i, or 528i application. The hose dimensions and branched configuration are important for proper fitment in the cooling system.\u003c\/p\u003e\u003ch2\u003eCommon Replacement Reasons\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCoolant seepage at the hose body or connection points\u003c\/li\u003e\n\u003cli\u003eCracking, hardening, or swelling from heat and age\u003c\/li\u003e\n\u003cli\u003eLoss of coolant from a damaged upper radiator hose\u003c\/li\u003e\n\u003cli\u003eIncorrect routing or fitment after prior hose replacement\u003c\/li\u003e\n\u003cli\u003eCooling-system service on BMW upper hose applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify the vehicle year, model, and upper hose routing before installation. Compare the hose end diameters and branched layout to the removed part to confirm match-up. Inspect adjoining clamps, radiator necks, and engine fittings for wear or corrosion before installing the new hose. Fill and bleed the cooling system according to BMW service procedures after replacement.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDayco manufactures this hose to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications listed for the part. The EPDM construction and molded configuration support consistent cooling-system replacement service on the specified BMW applications.\u003c\/p\u003e","brand":"Dayco","offers":[{"title":"Default Title","offer_id":43391523061941,"sku":"BCWL-72743","price":70.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DY_72743_Fro.jpg?v=1774728623","url":"https:\/\/www.partcatalog.com\/products\/dayco-72743-radiator-coolant-hose","provider":"PartCatalog","version":"1.0","type":"link"}