Gates 23859 Radiator Coolant Hose - Upper

Gates 23859 Molded Coolant Hose Overview

The Gates 23859 molded coolant hose is an OE-style radiator coolant hose built for upper cooling system routing on select Acura and Honda applications. Made from EPDM and formed to a molded shape, it helps restore proper coolant flow where a straight hose will not match the factory path.

Compatible with 2013-2015 Acura ILX, upper, and 2012-2015 Honda Civic, upper, this hose is a direct-fit replacement for vehicles that need a shaped coolant hose with OEM-quality dimensions.

Key Features

• Brand: Gates Molded Coolant Hose
• Part number: 23859
• Material: EPDM for cooling-system service
• Molded construction for factory-style routing
• End 1 inside diameter: 1.18 in. (30 mm)
• End 2 inside diameter: 1.18 in. (30 mm)
• Centerline length: 11.9 in. (302 mm)
• No spring and no quick-connect fittings

Product Details

Gates molded coolant hose 23859 is part of the Gates Molded Coolant Hose line, a replacement hose range built around OEM-quality specifications for upper, lower, bypass, heater, and other coolant applications. This molded radiator coolant hose is shaped to follow the original hose path, which helps simplify replacement on the Acura ILX and Honda Civic cooling system. If you are searching for a 2012-2015 Honda Civic upper radiator hose or a 2013-2015 Acura ILX upper coolant hose, this part number 23859 is the relevant OE-style option.

This part cross-references Dixie Electric Ltd 16533 for the same application.

Common Problems This Hose Can Address

• Cracked or split upper radiator hose
• Coolant seepage at the hose body
• Collapsed or softened hose material
• Incorrect fit from a non-molded replacement hose
• Loss of proper coolant routing in the upper cooling circuit

Installation Notes and Tips

Inspect the mating necks, clamps, and surrounding cooling-system components before installation. Drain coolant as needed, transfer the hose along the factory routing, and verify that the molded shape sits without twist or tension. After installation, refill and bleed the cooling system according to the vehicle service procedure and check for leaks at operating temperature.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for the listed Acura and Honda fitments. The EPDM construction and molded profile are selected to match factory-style cooling system service requirements.