Gates 18301 HVAC Heater Hose

Gates Molded Heater Hose for Tight Engine Bays

The Gates 18301 molded heater hose is a factory-shaped coolant hose built for smaller, tighter engine compartments where a straight hose will not route correctly. It is made from EPDM and is approved for coolant, water, air, and marine applications.

Use this Gates Molded Heater Hose when you need an OEM-style replacement for heater and coolant routing on select Acura, Dodge, Mitsubishi, and Isuzu applications, including Acura Legend and Mitsubishi Mirage fitments.

Key Features

• Brand: Gates Molded Heater Hose
• Part number: 18301
• EPDM construction for coolant and heater service
• Factory-molded shape for compact engine bay routing
• Small I.D. hose with 0.38 in. / 10 mm inside diameter at both ends
• Centerline length: 9.9 in. / 251 mm
• Approved for coolant, water, air, and marine applications
• OEM-style replacement for select HVAC heater hose routing

Product Details

The Gates 18301 is part of the Molded Heater Hose line, which focuses on OE-style formed hoses for modern engine compartments with limited clearance. Its molded EPDM construction helps maintain the correct routing and fit where a formed hose is required, rather than a universal straight hose. This part number is used across multiple vehicle applications, including Acura Legend, Dodge Colt, Mitsubishi Mirage, and Isuzu Trooper configurations. Cross-reference part numbers include Dayco 87002 and Four Seasons 63166 for the same application.

Common Problems This Hose Can Address

• Cracked or leaking heater hose at the coolant circuit
• Incorrect hose routing in tight engine compartments
• Restricted coolant flow caused by a deteriorated molded hose
• Heat-related hose hardening or splitting
• Replacement needs for heater and radiator/HVAC coolant hose routing

Installation Notes and Tips

Verify the hose shape, end inside diameter, and centerline length before installation. This part is listed for specific routing points such as thermostat to throttle body, throttle body to thermostat, pipe to thermostat, and pipe-to-pipe applications. Confirm the vehicle year, make, model, and hose position against the fitment data for Acura Legend, Dodge Colt, Mitsubishi Mirage, and Isuzu Trooper before ordering. Gates 18301 should be installed on the correct coolant path to preserve factory routing and clearance.

Quality Assurance

Gates manufactures this molded hose as an OEM-style replacement built to match the demands of compact engine bay cooling and heater routing. The EPDM material and formed construction support consistent fitment across the listed applications.