{"product_id":"dayco-88503-hvac-heater-hose","title":"Dayco 88503 HVAC Heater Hose - Pipe To Heater","description":"\u003ch2\u003eDayco Small I.D. Heater Hose for VW Golf and Jetta\u003c\/h2\u003e\u003cp\u003eDayco Part Number 88503 is a branched HVAC heater hose built for specific Volkswagen heater pipe-to-heater applications. It uses EPDM construction and SAE J20R3 Class D-1 \/ SAE J1684 Type EC specifications to match the demands of coolant routing in the heating system.\u003c\/p\u003e\u003cp\u003eCompatible With 2001-2005 Volkswagen Jetta, Pipe To Heater, and 2002-2006 Volkswagen Golf, Pipe To Heater. This Dayco 88503 hose is shaped for vehicles with a quick connect and small I.D. heater hose routing.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEPDM rubber construction for heater hose service\u003c\/li\u003e\n\u003cli\u003eBlack finish for OE-style appearance\u003c\/li\u003e\n\u003cli\u003eBranched hose design for multi-path coolant routing\u003c\/li\u003e\n\u003cli\u003eEnd 1 inside diameter: 7\/8 in.\u003c\/li\u003e\n\u003cli\u003eEnd 2 inside diameter: 31\/32 in.\u003c\/li\u003e\n\u003cli\u003eEnd 3 inside diameter: 5\/16 in.\u003c\/li\u003e\n\u003cli\u003eBuilt to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications\u003c\/li\u003e\n\u003cli\u003eDayco 88503 small I.D. heater hose for Volkswagen cooling and HVAC routing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cp\u003eDayco’s Small I.D. Heater Hose line focuses on heater and coolant transfer applications that require accurate hose sizing and reliable routing. Part Number 88503 is a branched hose with a trunk height of 13 1\/2 inches, making it suitable for the factory-style pipe-to-heater layout used on select Volkswagen Golf and Volkswagen Jetta models. The EPDM material is commonly used in coolant systems because it handles heat and fluid exposure associated with heater hose service.\u003c\/p\u003e\u003cp\u003eThis hose is listed for 2001-2005 Volkswagen Jetta and 2002-2006 Volkswagen Golf applications with quick connect and small I.D. heater hose notes. If you are searching for a Volkswagen Golf heater hose replacement or a Volkswagen Jetta pipe to heater hose, Dayco 88503 matches those fitment details directly.\u003c\/p\u003e\u003ch2\u003eCommon Issues This Hose Can Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCracked or aged heater hose material\u003c\/li\u003e\n\u003cli\u003eCoolant seepage at the heater pipe connection\u003c\/li\u003e\n\u003cli\u003eRestricted heater coolant flow from a damaged hose\u003c\/li\u003e\n\u003cli\u003eImproper routing caused by a failed branched hose\u003c\/li\u003e\n\u003cli\u003eLoss of cabin heat related to hose deterioration\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the vehicle’s heater hose routing, quick connect style, and end diameters before installation. Compare the original hose shape and branch layout to the Dayco 88503 to confirm the pipe-to-heater configuration on your Volkswagen Golf or Jetta. Inspect adjoining clamps, connectors, and heater pipes for wear or corrosion before reassembly.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDayco manufactures this hose to SAE J20R3 Class D-1 and SAE J1684 Type EC standards for heater hose applications. The Small I.D. Heater Hose product line is built around application-specific sizing and routing for direct-fit coolant transfer service.\u003c\/p\u003e","brand":"Dayco","offers":[{"title":"Default Title","offer_id":43391576244405,"sku":"BCWL-88503","price":41.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DY_88503_Fro.jpg?v=1774728829","url":"https:\/\/www.partcatalog.com\/products\/dayco-88503-hvac-heater-hose","provider":"PartCatalog","version":"1.0","type":"link"}