Dayco 71539 Radiator Coolant Hose - Lower or Lower - Pipe-2 To Intake Manifold

Dayco Curved Radiator Hose 71539

Dayco 71539 is a curved radiator coolant hose built for lower cooling-system routing on select Ford, Mercury, and Mercedes-Benz applications. Made from EPDM and finished in black, it uses a single I.D. hose design with 1 5/16-inch inside diameter at both ends for a direct replacement-style fit.

This Dayco Curved Radiator Hose line is built for vehicle-specific cooling layouts where a formed hose is needed to follow the factory path without kinking or collapse. Part number 71539 is listed for lower radiator hose positions and lower pipe-to-intake-manifold routing on the applications shown below.

Key Features

• EPDM construction for cooling-system service
• Black finish for OE-style appearance
• Single I.D. hose design
• 1 5/16-inch inside diameter at both ends
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Curved hose profile for lower radiator routing

Application Details

Compatible With select 1996-1998 Ford Taurus lower pipe-2 to intake manifold applications and 1996-1998 Mercury Sable lower pipe-2 to intake manifold applications. It also matches lower radiator hose applications on 1994-1995 Mercedes-Benz E320, 1988-1993 Mercedes-Benz 300CE, 300E, and 300TE, plus 1988-1991 Mercedes-Benz 300SE and 300SEL, and 1989 Mercedes-Benz 260E.

This part cross-references Ford F5DE-8A520-CB for the same application.

What It Helps Address

• Cracked or hardened lower radiator hose material
• Coolant leaks at the hose body or bends
• Restricted coolant flow from a collapsed hose
• Poor fit from a straight universal hose in a curved routing path
• Cooling-system service needs on Ford Taurus, Mercury Sable, and Mercedes-Benz lower hose applications

Installation Notes and Tips

Verify end diameters, routing, and position before installation. This hose is specified as a lower curved radiator hose, so confirm the vehicle uses the listed lower or lower pipe-to-intake-manifold configuration. Inspect hose necks, clamps, and adjoining cooling components for wear before reassembly, and refill the cooling system with the correct coolant after installation.

Quality Assurance

Dayco manufactures this hose to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications for cooling-system service. The EPDM construction supports consistent performance in radiator hose applications across the listed Ford, Mercury, and Mercedes-Benz fitments.