{"product_id":"dayco-71621-hvac-heater-hose","title":"Dayco 71621 HVAC Heater Hose - Intake Manifold To Pipe or Pipe To Pipe","description":"\u003ch2\u003eOverview of Dayco Curved Radiator Hose 71621\u003c\/h2\u003e\u003cp\u003eThe Dayco Curved Radiator Hose 71621 is designed for reliable performance in HVAC systems of select Nissan, Toyota, and Infiniti vehicles. Engineered with durable EPDM material, this black single inside diameter hose ensures consistent coolant flow and heat resistance for models like the Nissan Pathfinder and Toyota 4Runner.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConstructed from EPDM material for heat and chemical resistance\u003c\/li\u003e\n\u003cli\u003eBlack color with a 1\/2 inch inside diameter on both ends\u003c\/li\u003e\n\u003cli\u003eSingle i.d. hose type suitable for HVAC heater applications\u003c\/li\u003e\n\u003cli\u003eMeets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications\u003c\/li\u003e\n\u003cli\u003eTrunk height of 3 inches for proper fitment in curved radiator hose applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Dayco Curved Radiator Hose line is specifically designed to provide a precise fit and reliable durability for HVAC heater hose needs. Part number 71621 features a curved design that accommodates the routing requirements of vehicles such as the Nissan Frontier, Toyota Celica, and Infiniti QX4. Made from EPDM, this hose resists heat, ozone, and coolant chemicals, ensuring long service life under demanding engine compartment conditions. Both ends have a 1\/2 inch inside diameter, making it compatible with standard HVAC connections in the specified vehicle models.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis HVAC heater hose is compatible with various Nissan, Toyota, and Infiniti models, including:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eNissan Pathfinder, Frontier, Xterra, Pickup\u003c\/li\u003e\n\u003cli\u003eToyota 4Runner, Celica\u003c\/li\u003e\n\u003cli\u003eInfiniti QX4\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIt is designed to replace worn or damaged heater hoses that may cause coolant leaks or reduced heating efficiency.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by Dayco 71621 Hose\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCoolant leaks due to cracked or brittle hoses\u003c\/li\u003e\n\u003cli\u003eReduced heater performance from restricted coolant flow\u003c\/li\u003e\n\u003cli\u003eHose swelling or deformation from heat exposure\u003c\/li\u003e\n\u003cli\u003eFailure to meet SAE specifications causing premature wear\u003c\/li\u003e\n\u003cli\u003eImproper fitment leading to hose disconnection or leaks\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure the engine is cool before removing the old hose\u003c\/li\u003e\n\u003cli\u003eCheck hose clamps and replace if corroded or damaged\u003c\/li\u003e\n\u003cli\u003eVerify the 1\/2 inch inside diameter matches your vehicle’s HVAC connections\u003c\/li\u003e\n\u003cli\u003eRoute the hose carefully to avoid kinks or contact with moving parts\u003c\/li\u003e\n\u003cli\u003eTest for leaks after installation by running the engine and checking coolant flow\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDayco’s Curved Radiator Hose 71621 complies with SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring it meets industry requirements for HVAC heater hoses. Manufactured with EPDM material, it offers resistance to heat and coolant chemicals for dependable operation. Warranty details should be confirmed with the distributor or manufacturer, as coverage may vary.\u003c\/p\u003e","brand":"Dayco","offers":[{"title":"Default Title","offer_id":43391431737525,"sku":"BCWL-71621","price":24.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DY_71621_Fro.jpg?v=1774728396","url":"https:\/\/www.partcatalog.com\/products\/dayco-71621-hvac-heater-hose","provider":"PartCatalog","version":"1.0","type":"link"}