Gates 21918 Radiator Coolant Hose - Upper

Gates 21918 Molded Coolant Hose Overview

The Gates 21918 molded coolant hose is an OE-style radiator coolant hose built for upper cooling system routing. Made from EPDM and formed to the correct molded shape, it supports a direct replacement for select Nissan applications without the need to adapt a universal hose.

Compatible with 1991-1999 Nissan Sentra upper hose applications, 1995-1998 Nissan 200SX upper hose applications, and 1991-1993 Nissan NX upper hose applications, this hose is sized with 1.06 in. (27 mm) inside diameter ends and an 11.7 in. (297 mm) centerline length.

Key Features

• Part number: Gates 21918
• Molded radiator coolant hose for upper cooling system routing
• EPDM construction for coolant-system service
• 1.06 in. / 27 mm inside diameter at both ends
• 11.7 in. / 297 mm centerline length
• No spring and no quick-connect fittings
• Direct-fit molded profile for select Nissan cooling system layouts

Product Details

Gates Molded Coolant Hose line is engineered around OEM-quality specifications for upper, lower, bypass, heater, and other coolant hose applications. The molded shape helps match the original routing on the vehicle, which is important for maintaining proper hose alignment and clearance in the engine bay. For shoppers searching for a Nissan Sentra upper radiator hose, Nissan 200SX upper coolant hose, or Nissan NX molded coolant hose, Gates 21918 provides a vehicle-specific replacement option.

This part cross-references Dayco 71540 and FEL-PRO 61757 for the same application. The Gates 21918 part number is also used across interchange listings for related OE-style replacement needs.

Common Problems This Hose Can Address

• Cracked or split upper radiator hose
• Coolant leaks at the hose body
• Softening, swelling, or collapse from age and heat
• Incorrect routing caused by a non-molded replacement hose
• Cooling system service on aging Nissan Sentra, 200SX, or NX models

Installation Notes

Verify hose routing, end diameters, and centerline length before installation. Inspect the mating necks, clamps, and nearby cooling components for wear or corrosion, and replace any damaged parts before refilling the system. Confirm the hose is positioned to follow the original molded path so it clears belts, pulleys, and other engine components.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for replacement use in the cooling system. The molded design and EPDM material support consistent fitment for the listed Nissan upper hose applications.