Gates 18555 HVAC Heater Hose - Bypass To Tee

Gates 18555 Molded Heater Hose

The Gates 18555 molded heater hose is a factory-shaped coolant hose built for tight engine bays and OE-style routing. It is made from EPDM and is sized for small I.D. connections, making it a direct replacement choice for heater and coolant plumbing on select Toyota applications.

Compatible with 2009-2019 Toyota Corolla bypass to tee and 2009-2013 Toyota Matrix bypass to tee, this molded hose follows the original path for a cleaner, more accurate fit. Gates Molded Heater Hose 18555 is also suitable for water and air applications and is approved for marine use.

Key Features

• Factory-molded, OE-style shape for tighter engine compartments
• EPDM construction for coolant, water, and air service
• Small I.D. design for select heater hose routing
• End 1 inside diameter: 9 mm (.36 in)
• End 2 inside diameter: 9 mm (.36 in)
• Centerline length: 693 mm (27.3 in)
• Fits bypass-to-tee routing on select Toyota Corolla and Toyota Matrix models

Product Details

Gates Molded Heater Hose line products are shaped to match original hose routing where straight hose cannot follow the factory path. Part number 18555 is a molded coolant hose designed for precise fitment in compact engine compartments, helping maintain proper hose alignment around nearby components. This part cross-references Dayco 87006 for the same application.

Common Problems This Hose Can Address

• Cracked or leaking heater hose at the bypass-to-tee route
• Collapsed or softened hose from age and heat exposure
• Poor hose routing after a previous repair
• Coolant seepage at a molded hose section
• Fitment issues in tight Toyota Corolla and Toyota Matrix engine bays

Installation Notes and Tips

Verify the bypass-to-tee routing before installation and compare the hose shape, end diameters, and centerline length to the original part. Inspect adjoining clamps, tees, and coolant connections for wear before reassembly. 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 heater hose as an OE-style replacement part for select Toyota Corolla and Toyota Matrix applications. The EPDM construction and factory-molded profile support accurate routing and dependable service in coolant system use.