Gates 51555 Radiator Coolant Hose - Upper

Gates 51555 Molded Coolant Hose Overview

The Gates 51555 molded coolant hose is a radiator coolant hose built to OEM-quality specifications for select Lexus applications. It is formed from EPDM for dependable coolant-system service and is shaped to match the upper hose routing used on the listed vehicles.

Compatible with 2015-2017 Lexus NX200t upper coolant hose applications and 2018-2021 Lexus NX300 upper coolant hose applications, this molded hose supports a direct replacement approach for routine cooling-system repair. Gates 51555 is part of the Molded Coolant Hose line, which covers upper, lower, bypass, heater, and other coolant hose positions.

Key Features

• EPDM construction for coolant-system durability
• Molded shape for the upper hose routing on listed Lexus models
• End inside diameters: 1.31 in. (33 mm) and 1.44 in. (37 mm)
• Centerline length: 23.57 in. (599 mm)
• No spring included
• Gates 51555 radiator coolant hose for direct-fit replacement service

Product Line Details

Gates Molded Coolant Hose products are engineered as OE-style replacement hoses for a wide range of cooling-system positions. The line is built to cover common radiator and heater hose applications with molded routing that matches factory-style layouts, helping reduce the need to adapt universal hose stock during repair.

Detailed Description

This Gates 51555 hose is a molded radiator coolant hose designed for the upper cooling circuit on select Lexus NX models. The EPDM material is suited for coolant exposure, while the molded profile and measured end diameters help support proper fitment at the connection points. For technicians and DIY repair work, the part number 51555 provides a focused replacement option when servicing the cooling system on a Lexus NX200t or Lexus NX300.

This part cross-references Monroe Shocks & Struts (e.g., 1657136180, F11539) for the same application.

Common Cooling System Issues It Can Address

• Cracked or aged upper radiator hose
• Coolant seepage at hose connection points
• Softening or swelling from heat and coolant exposure
• Restricted service caused by a deteriorated molded hose
• Loss of factory-style hose routing on the cooling circuit

Installation Notes and Tips

Verify the hose routing, end diameters, and upper-position application before installation. Inspect adjoining clamps, necks, and coolant passages for wear or contamination, and confirm the cooling system is properly filled and bled after service. Gates 51555 is listed for upper hose use on the specified Lexus NX200t and Lexus NX300 model years.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for replacement use in the cooling system. The Gates 51555 part number is identified for the listed Lexus fitments and is backed by Gates’ established cooling-hose product engineering.