Dayco 71997 Radiator Coolant Hose - Lower

Dayco Curved Radiator Hose for Ford Focus

Dayco 71997 is a branched lower radiator coolant hose built for 2000-2004 Ford Focus applications. Made from EPDM and finished in black, this curved radiator hose follows the routing needed for the lower cooling circuit while meeting SAE J20R4 Class D-1 and SAE J1684 Type EC specifications.

For Ford Focus owners searching for a lower radiator hose replacement, Dayco 71997 provides the correct branched hose layout with multiple inside diameters to match the cooling system connection points. It is a direct-fit cooling hose for 2000, 2001, 2002, 2003, and 2004 Ford Focus models in the lower position.

Key Features

• Brand: Dayco
• Part number: 71997
• Curved radiator hose / branched hose design
• EPDM construction for cooling system use
• Black finish
• End inside diameters: 1 1/4 in., 1 5/16 in., and 3/4 in.
• Trunk height: 11 1/2 in.
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Fits 2000-2004 Ford Focus, lower

Detailed Description

Dayco 71997 is a radiator coolant hose engineered as a branched lower hose for the Ford Focus cooling system. The EPDM rubber construction is suited for coolant exposure and underhood temperature cycling, while the curved shape supports the factory hose routing on 2000-2004 Ford Focus models. If you are replacing a worn lower radiator hose on a Ford Focus, this part number 71997 matches the listed lower-position application and uses the specified multi-diameter hose ends for proper connection.

This part cross-references Ford OE numbers such as 1M51-8B273-AB and 3S4Z-8286-BA for the same application.

Common Problems This Hose Can Address

• Coolant leaks from a cracked or aged lower radiator hose
• Softening, swelling, or collapse of the hose under heat and pressure
• Improper fit from an incorrect hose shape or diameter
• Cooling system seepage at branched hose connection points
• Loss of coolant circulation caused by a damaged radiator hose

Installation Notes and Tips

Verify the vehicle is a 2000-2004 Ford Focus with the lower hose configuration before installation. Compare the hose routing, end diameters, and branch layout to the original part before removal. Drain the cooling system as needed, inspect the radiator necks and engine-side connections for wear, and replace any damaged clamps or sealing surfaces during service.

Quality Assurance

Dayco 71997 is built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications, supporting consistent material and performance requirements for radiator hose service. The Dayco Curved Radiator Hose line is designed for application-specific cooling system replacement where correct routing and fitment matter.