Gates 21660 Radiator Coolant Hose

Gates 21660 Molded Coolant Hose

Gates 21660 is a molded radiator coolant hose built to OEM-quality specifications for upper coolant routing. Made from EPDM, it provides the formed shape needed for direct replacement on a wide range of vehicles, including Toyota Land Cruiser, Toyota Sequoia, Toyota Tundra, and Lexus LX470 applications.

The Gates Molded Coolant Hose line covers upper, lower, bypass, heater, and other coolant paths, giving technicians a formed-hose replacement option that reduces the need for custom bending or dealer sourcing. This part cross-references Dayco 71753 for the same application.

Key Features

• EPDM construction for coolant-system service
• Molded design for accurate hose routing
• 1.5 in. inside diameter at both ends
• 15.1 in. centerline length
• No spring and no quick-connect fittings
• Direct replacement style for upper radiator coolant applications

Detailed Description

This Gates molded coolant hose is engineered for upper radiator use where a formed hose is required to follow the factory path between the radiator and engine. The 1.5-inch end diameters and 15.1-inch centerline length support a broad range of fitments, including upper hose service on Toyota Land Cruiser, Toyota Sequoia, Toyota Tundra, and Lexus LX470 models. Gates part number 21660 is part of a comprehensive molded hose program built around OEM-style dimensions and application coverage.

Because the hose is molded rather than universal, it helps maintain proper routing in crowded engine bays and supports a cleaner replacement on vehicles that use shaped coolant hose geometry. Gates 21660 is also listed across multiple interchange references, making it a practical OE-style replacement choice when matching the original hose profile matters.

What It Helps Fix

• Cracked or split upper radiator hose
• Coolant leaks at a formed hose section
• Collapsed or softened EPDM hose material
• Poor hose routing after a previous repair
• Replacement needs on vehicles requiring a molded upper coolant hose

Installation Notes and Tips

• Verify the vehicle year, make, model, and hose position before ordering.
• Confirm the hose path matches the original molded shape before installation.
• Inspect clamps, radiator necks, and engine fittings for wear or corrosion during replacement.
• Drain coolant safely and refill the system according to the vehicle service procedure.
• For fitments noted as cut-to-fit, follow the application notes exactly before trimming.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for radiator and heater hose service. The molded construction and application-specific dimensions support consistent replacement fitment across the listed vehicles and cooling-system configurations.