ContiTech 63515 Molded Heater Hose - SAE 20R3EC ECR-Resistant

The ContiTech 63515 is a precision-molded heater hose engineered to transfer glycol-based coolants to and from the heater core, through bypass circuits to the radiator, and through other components within the vehicle's cooling system.

Built to SAE 20R3EC Class D1 and Class D2 specifications, this molded hose meets or exceeds original equipment standards and is pre-shaped for a direct, application-specific fit — eliminating the need for cutting, bending, or adapting straight hose sections.

Key Features:

• SAE 20R3EC Certified — Meets Class D1 and Class D2 specifications for molded heater hose applications
• Electrochemical Degradation Resistant (ECR) — Resists the internal deterioration caused by electrolytic action from modern coolant formulas
• Glycol-Compatible Construction — Engineered to handle all glycol-based antifreeze and coolant mixtures
• Molded Design — Pre-shaped for a precise OE-style fit without modification
• Underhood Temperature Rated — Constructed to withstand the elevated heat environments typical of modern engine bays

Cross-reference part numbers: 87772, S-63515, 18963, 18984, 19157, 8971482180, 8972206611, 8972206613, 8943763391, S-4650, G922J48010.

ContiTech molded heater hoses are a trusted OEM-quality replacement designed for long-lasting, leak-free performance in the cooling system.