Gates 51759 HVAC Heater Hose - Heater Inlet

Gates 51759 Molded Coolant Hose Overview

The Gates 51759 molded coolant hose is a molded HVAC heater hose built for specific vehicle applications and formed to match OE-style routing. It uses EPDM, plastic, and steel construction with an integrated female quick connector for a direct-fit service replacement.

Compatible with 1999-2004 Land Rover Discovery heater inlet applications, this Gates molded coolant hose supports proper coolant flow through the heater circuit. The Gates 51759 is built to the application-specific shape needed for Land Rover Discovery heater inlet service.

Key Features

• Application-specific molded coolant hose for HVAC heater inlet service
• OE-style modular hose design with integrated female quick connector
• Constructed from EPDM, plastic, and steel for coolant-system use
• Centerline length: 23 in. (584 mm)
• End inside diameters: 0.75 in. (19 mm) and 0.85 in. (22 mm)
• Fits 1999-2004 Land Rover Discovery, heater inlet

Product Details

Gates Molded Coolant Hose products are built around vehicle-specific modular assemblies rather than universal hose shapes. The 51759 follows the original routing and connection style used in the heater circuit, helping maintain the correct hose path and connection interface for the Land Rover Discovery. If you are replacing a worn heater inlet hose on a 1999-2004 Land Rover Discovery, this part number provides the correct molded configuration for that application. This part cross-references URO PCH500040 for the same application.

Common Problems This Part Can Address

• Coolant leakage at a cracked or aged heater inlet hose
• Improper hose routing after a previous repair
• Damaged quick-connector interface at the heater hose connection
• Restricted heater coolant flow caused by hose deterioration
• Fitment issues from using a universal hose in a molded application

Installation Notes and Tips

Verify the heater inlet routing and connector style before installation. Compare the original hose shape, end diameters, and connection points to the Gates 51759 and inspect adjoining coolant-system components for wear, corrosion, or residue before reassembly. Proper coolant refill and bleeding procedures should be followed after service.

Quality Assurance

Gates is a recognized aftermarket supplier of modular coolant hose assemblies and builds this hose to application-specific OE-style requirements for the listed Land Rover Discovery fitment. Part number 51759 is manufactured for direct replacement use in the specified heater inlet application.