Continental 66600 Radiator Coolant Hose - Upper

Radiator Coolant Hose for Toyota Sienna

Continental Molded 66600 is an upper radiator coolant hose for select Toyota Sienna models. It is built with a 1.310-inch inside diameter at both ends and a 19.610-inch overall length for a precise OE-style routing and fit.

Designed for the cooling system on 2011-2020 Toyota Sienna, this molded hose transfers glycol-based coolant through the engine cooling circuit while matching the original configuration. Continental 66600 is made with EPDM tube and cover materials and synthetic reinforcement that meet or exceed SAE 20R4EC Class D1 requirements.

Key Features

• Fits 2011-2020 Toyota Sienna, upper
• Continental Molded 66600 radiator coolant hose
• 1.310-inch inside diameter at hose end 1
• 1.310-inch inside diameter at hose end 2
• 19.610-inch hose length for OE-style routing
• EPDM tube and cover with synthetic reinforcement
• Built to meet or exceed SAE 20R4EC Class D1 specifications
• Exact OEM configuration for proper fitment

Detailed Description

Continental 66600 is a molded upper radiator hose engineered for the Toyota Sienna cooling system. The hose dimensions, including the 1.310-inch inside diameter at both ends and the 19.610-inch length, support a direct replacement layout that follows the factory hose path. This helps maintain proper coolant flow between cooling system components on 2011-2020 Toyota Sienna applications.

The Continental Molded line focuses on OE-style hose geometry and material construction. For this application, the EPDM tube and cover are paired with synthetic reinforcement to meet or exceed SAE 20R4EC Class D1 specifications. This part cross-references Febi-Bilstein 21508 for the same application.

What This Hose Helps Address

• Upper radiator hose cracking or splitting
• Coolant leaks at the hose body or connection points
• Softening, swelling, or deterioration from heat and coolant exposure
• Restricted coolant transfer caused by a damaged hose
• Fitment issues from a hose that does not match the factory shape

Installation Notes and Tips

Verify the hose routing, end diameters, and upper-position placement before installation. Compare the old hose to the new Continental 66600 to confirm the molded shape and connection points match the vehicle layout. Inspect adjoining clamps, necks, and coolant passages for wear or corrosion before reassembly.

After installation, refill the cooling system with the correct coolant mixture and check for leaks once the engine reaches operating temperature. This part fits 2011-2020 Toyota Sienna, upper, and is listed for the Toyota Sienna across the 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, and 2020 model years.

Quality Assurance

Continental manufactures this molded radiator coolant hose to OE-style dimensional and material standards, with construction that meets or exceeds SAE 20R4EC Class D1 specifications. Part number 66600 is built for direct-fit replacement use on the specified Toyota Sienna applications.