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Quality engineered to resist corrosion and coolant leaks Dorman HVAC Heater Hose Assemblies are designed to limit the possibility of overheating and subsequent engine damage. HVAC heater hose assemblies typically require replacement due to cracks in the original plastic construction. Our OE FIX repair solution addresses this common failure mode by upgrading the Y-connector material to aluminum for increased durability and a longer service life. Plus Dorman Heater Hose Assemblies are application-specific and ensure the easiest cost-savings alternative to replacing the entire assembly. All Dorman products are engineered in the United States and backed by 100 years of automotive aftermarket experience.