{"product_id":"gates-18478-hvac-heater-hose","title":"Gates 18478 HVAC Heater Hose - Auxiliary Heater Pipe-5 To Auxiliary Heater Pipe-6","description":"\u003ch2\u003eOverview of Gates Molded Heater Hose 18478\u003c\/h2\u003e\u003cp\u003eThe Gates Molded Heater Hose 18478 is designed specifically for Toyota Sienna models, providing reliable HVAC system performance. Constructed from durable EPDM material, this molded heater hose ensures consistent heat transfer and long-lasting service.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConstructed from high-quality EPDM material for heat and chemical resistance\u003c\/li\u003e\n\u003cli\u003eMolded design for precise fit and easy installation\u003c\/li\u003e\n\u003cli\u003eCenterline length of 11.4 inches (290 mm) for accurate replacement\u003c\/li\u003e\n\u003cli\u003eInside diameter of 0.5 inches (13 mm) on both ends\u003c\/li\u003e\n\u003cli\u003eCompatible with Toyota Sienna HVAC systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Gates Molded Heater Hose 18478 is engineered to meet the exact specifications required for the Toyota Sienna's heating and cooling system. The hose features a molded construction that eliminates the need for additional clamps or fittings, ensuring a secure and leak-free connection. Made from EPDM, a synthetic rubber known for its resistance to heat, ozone, and automotive fluids, this heater hose maintains flexibility and durability under demanding conditions. With an inside diameter of 0.5 inches (13 mm) on both ends and a centerline length of 11.4 inches (290 mm), it provides a precise fit that supports efficient coolant flow within the HVAC system.\u003c\/p\u003e\u003ch2\u003eAbout the Molded Heater Hose Product Line\u003c\/h2\u003e\u003cp\u003eThe Molded Heater Hose line by Gates focuses on delivering pre-formed hoses that match OEM specifications for various vehicle models. This product line emphasizes exact fitment and material quality to reduce installation time and improve system reliability. The molded design of the 18478 part number ensures compatibility with Toyota Sienna models, providing a direct replacement that maintains the integrity of the vehicle's heating system.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacement of worn or cracked heater hoses in Toyota Sienna HVAC systems\u003c\/li\u003e\n\u003cli\u003eResolving coolant leaks that cause heating inefficiency\u003c\/li\u003e\n\u003cli\u003ePreventing overheating due to restricted coolant flow\u003c\/li\u003e\n\u003cli\u003eEliminating hose collapse or deformation under pressure\u003c\/li\u003e\n\u003cli\u003eMaintaining proper heater core function for cabin comfort\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 heater hose\u003c\/li\u003e\n\u003cli\u003eVerify the hose dimensions match the OEM specifications: 0.5 inch inside diameter and 11.4 inch length\u003c\/li\u003e\n\u003cli\u003eInspect hose connections and clean fittings before installation\u003c\/li\u003e\n\u003cli\u003eUse appropriate clamps if required, although molded design may reduce clamp necessity\u003c\/li\u003e\n\u003cli\u003eCheck for leaks after installation by running the engine and monitoring the HVAC system\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eGates Molded Heater Hose 18478 is manufactured to meet strict quality standards, ensuring durability and performance in automotive HVAC applications. The EPDM material provides resistance to heat, ozone, and automotive fluids, contributing to the hose's longevity. While specific warranty details are not provided, Gates products typically adhere to industry standards for reliability and are backed by the brand's reputation for quality.\u003c\/p\u003e","brand":"Gates","offers":[{"title":"Default Title","offer_id":45303968530613,"sku":"BBSC-18478","price":28.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/ZO_18478_Fro.jpg?v=1775145712","url":"https:\/\/www.partcatalog.com\/products\/gates-18478-hvac-heater-hose","provider":"PartCatalog","version":"1.0","type":"link"}