Gates 51877 Radiator Coolant Hose - Lower

Gates Molded Coolant Hose for Hyundai Tucson

The Gates 51877 molded coolant hose is built for the lower radiator hose position on select 2016-2018 Hyundai Tucson models. It follows application-specific dimensions and OE-style routing details to support a proper coolant system connection.

Gates Molded Coolant Hose products are application-matched replacement hoses that mirror original equipment layouts and can incorporate integrated OE-style features such as connectors and sensors where required. This makes the 51877 a direct-fit style solution for the Hyundai Tucson lower coolant hose application.

Key Features

• Part number: 51877
• Lower radiator coolant hose for select Hyundai Tucson applications
• EPDM and plastic construction
• End 1 inside diameter: 1.35 in. (34 mm)
• End 2 inside diameter: 1.65 in. (42 mm)
• Centerline length: 25.25 in. (641 mm)
• Female quick connector at one end
• OE-style molded routing for application-specific fitment

Detailed Description

Gates 51877 is a molded radiator coolant hose engineered for the lower position on 2016-2018 Hyundai Tucson models. The hose uses EPDM and plastic materials and is shaped to match the vehicle’s original coolant line routing, helping maintain proper hose alignment and connection points. If you are replacing a worn lower coolant hose on a Hyundai Tucson, this part number provides an OE-style replacement built around the factory application.

This part cross-references Hyundai OE numbers 25410D3700 and F11322 for the same application. Gates 51877 is also listed with interchange references R40195 and is the correct search term for buyers looking for a 2016-2018 Hyundai Tucson lower radiator coolant hose.

Common Reasons for Replacement

• Coolant seepage or leakage at the lower hose connection
• Cracking, swelling, or hardening of the hose material
• Damaged quick connector or connection interface
• Improper hose fit after prior repair or replacement
• Cooling system service on a 2016-2018 Hyundai Tucson

Installation Notes and Tips

Verify the lower hose routing, connector style, and end diameters before installation. Inspect mating fittings, clamps, and nearby cooling system components for wear or contamination, and confirm the hose seats fully at the quick connector connection point. After installation, refill and bleed the cooling system according to Hyundai service procedures.

Quality Assurance

Gates is a recognized aftermarket supplier of modular coolant hose assemblies and application-specific cooling components. Part number 51877 is built to match the intended Hyundai Tucson lower hose application and OE-style configuration details.