Gates 18558 HVAC Heater Hose - Throttle Body Outlet

Gates 18558 Molded Heater Hose Overview

The Gates 18558 molded heater hose is a factory-molded, OEM-style coolant hose built for tight engine bays and small-diameter routing. It is made from EPDM and is approved for coolant, water, air, and marine applications.

Compatible With 2009-2013 Toyota Matrix, throttle body outlet, and 2009-2012 Toyota Corolla, throttle body outlet.

Key Features

• Brand: Gates Molded Heater Hose line
• Part number: 18558
• EPDM construction for coolant and heater hose service
• Small inside diameter: 8 mm (0.31 in.) at both ends
• Centerline length: 318 mm (12.5 in.)
• Molded shape for compact routing in tighter engine compartments
• Approved for coolant, water, air, and marine use

Product Details

Gates 18558 is a molded HVAC heater hose formed to match OE-style routing where a straight hose would not follow the factory path cleanly. The molded profile helps maintain proper hose alignment at the throttle body outlet on select Toyota applications, including the Corolla and Matrix. If you are replacing a worn or leaking molded coolant hose, this part number provides the correct small I.D. fitment and centerline length for the listed vehicles.

This part cross-references Four Seasons 18558 for the same application.

Common Issues This Hose Can Address

• Coolant seepage at a cracked or aged molded hose
• Improper routing caused by a collapsed or misshapen hose
• Restricted heater or coolant flow from internal hose deterioration
• Fitment problems when a straight hose does not match the factory bend
• Replacement needs at the throttle body outlet on Toyota Corolla and Toyota Matrix models

Installation Notes and Tips

Verify the hose routing, end diameters, and centerline length before installation. Confirm the throttle body outlet application on your Toyota Corolla or Toyota Matrix and inspect adjoining clamps, fittings, and mating surfaces for wear or corrosion. Drain coolant as needed before removal, then route the molded hose without twisting it so the factory shape is preserved.

Quality Assurance

Gates is known for OE-style hose construction and molded replacement parts that follow factory routing requirements. The EPDM material and molded design support consistent fitment for the listed Toyota applications.