Continental 66397 Radiator Coolant Hose - Lower or Upper

Radiator Coolant Hose Overview

Continental Molded radiator coolant hose 66397 is built to move glycol-based coolant through the cooling system with an exact OEM configuration. It is a fitment-based replacement for select Volkswagen Jetta and Volkswagen Rabbit applications, with molded construction that follows the original routing.

Key Features

• EPDM tube and cover for coolant-system service.
• Synthetic reinforcement meets or exceeds SAE 20R4EC Class D1 specifications.
• Exact OEM configuration for a direct-fit replacement profile.
• Molded shape supports proper hose routing in the cooling system.
• 1.250 in. inside diameter at both ends and 17.240 in. overall length.

Detailed Description

Continental 66397 is a molded radiator coolant hose engineered for coolant transfer in the vehicle's cooling system. The EPDM construction and synthetic reinforcement are specified to meet or exceed SAE 20R4EC Class D1 requirements, while the molded design matches the original configuration for a precise fit. This hose is listed for Fits 2005 Volkswagen Jetta, Upper; Fits 2006-2009 Volkswagen Jetta, Upper; Fits 2010-2014 Volkswagen Jetta, Upper; and Fits 2006-2009 Volkswagen Rabbit, Lower. This part cross-references Dayco 72478 and Gates 23075 for the same application. Part number 66397 is a practical replacement choice when the original hose is cracked, softened, or no longer sealing correctly.

Common Replacement Reasons

• Coolant leaks from a deteriorated hose.
• Softening, swelling, or cracking in the hose body.
• Improper routing after a previous repair.
• Loss of sealing at the hose ends.
• Cooling-system service on a molded hose assembly.

Installation Notes

Verify the hose routing, end diameters, and molded shape against the original part before installation. For 2006-2009 Volkswagen Jetta applications, the fitment notes specify re-use of OEM quick connects. Confirm the cooling system is cool and properly drained before removing the old hose, and inspect adjacent connections for wear or contamination that could affect sealing.

Quality Assurance

Continental specifies this hose to meet or exceed SAE 20R4EC Class D1 standards and uses an exact OEM configuration for fit consistency. Part number 66397 is part of Continental's Molded line, focused on replacement hoses formed to match original cooling-system geometry.