Gates 18437 HVAC Heater Hose - Heater To Tee, Pipe To Throttle Body or Valve-1 To Pipe

Gates 18437 Molded Heater Hose Overview

The Gates 18437 molded heater hose is an OEM-style coolant hose built for tight engine bays where a straight hose will not route correctly. Made from EPDM, it serves coolant, water, and air applications and is also approved for marine use.

Compatible With select Toyota Prius C and Honda Accord applications, this molded heater hose supports factory-style routing in heater and coolant circuits. The Gates Molded Heater Hose line focuses on small I.D. molded hose shapes for modern compact engine compartments.

Key Features

• EPDM construction for coolant, water, and air service
• Factory-molded shape for tighter engine compartment routing
• Small I.D. hose with 0.5 in. / 13 mm ends
• 19 in. / 483 mm centerline length
• OEM-style molded heater hose design
• Approved for marine applications

Detailed Description

Gates 18437 is a molded coolant and heater hose designed to match the routing needs of compact engine layouts. Its 0.5-inch inside diameter at both ends and 19-inch centerline length make it suitable for applications that require a formed hose rather than a universal straight section. This part number is listed for 2012-2018 Toyota Prius C, pipe to throttle body, and 2019 Toyota Prius C, pipe to throttle body, as well as 1984-1985 Honda Accord heater and valve-to-pipe positions.

This Gates Molded Heater Hose line is built for OE-style fitment where space is limited and hose routing matters. The Gates 18437 part number is a direct reference for buyers searching for a molded heater hose for Toyota Prius C or Honda Accord cooling and heater system service.

This part cross-references ACI 86821 for the same application.

What It Helps Address

• Cracked or aged heater hose routing in compact engine bays
• Coolant leaks at molded hose sections
• Improper fit from straight hose used in a formed application
• Service replacement for pipe-to-throttle-body coolant routing on Toyota Prius C
• Heater circuit hose replacement on older Honda Accord applications

Installation Notes and Tips

Verify hose routing, end diameters, and centerline length before installation. For 2019 Toyota Prius C, the listing notes cut-to-fit use at the pipe-to-throttle-body position. Confirm the hose follows the original molded path and inspect adjoining clamps, pipes, and fittings for wear before reassembly.

Quality Assurance

Gates manufactures this molded hose as an OE-style replacement in EPDM for coolant, water, air, and marine service. The molded construction supports factory routing in applications where a formed hose is required.