Gates 51874 Radiator Coolant Hose - Lower

Gates 51874 Lower Radiator Coolant Hose

The Gates Molded Coolant Hose 51874 is a direct-fit lower radiator coolant hose built to OEM-quality specifications for select Mazda applications. It is formed from EPDM and shaped to match the factory routing for a clean replacement on the Mazda CX-5 and Mazda 6.

Gates Molded Coolant Hose line covers upper, lower, bypass, heater, and other coolant hose applications, giving technicians a broad OE-style replacement option for radiator hose service. Part number 51874 is part of that molded hose family and is built for the lower coolant circuit on the listed vehicles.

Key Features

• EPDM construction for coolant-system durability
• Lower radiator coolant hose application
• 1.25 in. inside diameter at both ends
• 31.97 in. centerline length for factory-style routing
• No spring included
• Direct replacement for Gates 51874

Fitment Details

• Fits 2018-2025 Mazda CX-5, lower
• Fits 2018-2021 Mazda 6, lower

What This Hose Helps Address

• Coolant leaks from a cracked or aged lower radiator hose
• Softening, swelling, or collapse in the coolant line
• Improper hose routing after radiator service
• Loss of coolant flow caused by a damaged hose section
• Replacement needs for a worn Mazda CX-5 or Mazda 6 lower hose

Installation Notes

Verify hose routing, end diameters, and centerline length against the original part before installation. Inspect adjoining clamps, radiator necks, and coolant connections for wear or residue, and confirm the cooling system is properly filled and bled after service. This part cross-references F11574 and PYFB1518Y for the same application.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for the listed Mazda applications. The Gates molded coolant hose line is engineered as a broad replacement source for radiator, heater, bypass, and other coolant hose needs.