Dayco 71532 Radiator Coolant Hose - Lower

Dayco Curved Radiator Hose 71532

Dayco 71532 is a curved radiator coolant hose built for lower cooling-system routing on select BMW, Ford, and Mazda applications. Made from EPDM rubber with a black finish, it uses a single I.D. hose design and matches SAE J20R4 Class D-1 and SAE J1684 Type EC specifications.

For buyers searching for a lower radiator hose for a 1999-2002 BMW Z3 without Quick Connect, or a curved radiator hose for Ford Explorer, Ford Ranger, Mazda B4000, or Mazda Navajo, this part number provides a direct-fit replacement option. Dayco 71532 is also referenced by cross numbers such as Gates 21623 and Motorcraft KM2003 for the same application.

Key Features

• EPDM construction for cooling-system hose service
• Black finish for OE-style appearance
• Single I.D. hose design
• 1 7/16 in. inside diameter at both ends
• Curved radiator hose profile for lower hose routing
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Dayco part number 71532

Product Details

Dayco’s Curved Radiator Hose line focuses on replacement coolant hoses shaped to follow factory routing and maintain proper coolant flow through the radiator circuit. This hose is formed for lower radiator applications and uses EPDM material for standard cooling-system durability. The 1 7/16 in. end diameters and curved profile make it a direct match for the listed vehicles, including BMW Z3, Ford Explorer, Ford Ranger, Mazda B4000, and Mazda Navajo applications.

Compatible With: Fits 1999-2002 BMW Z3, lower; Fits 1991-1994 Ford Explorer, lower; Fits 1990-1994 Ford Ranger, lower; Fits 1994 Mazda B4000, lower; Fits 1991-1994 Mazda Navajo, lower.

Common Cooling Issues This Hose Addresses

• Cracked or hardened lower radiator hose material
• Coolant leaks at the hose body
• Loss of proper hose shape from age or heat cycling
• Restricted coolant transfer through a deteriorated hose
• Incorrect routing from a mismatched replacement hose

Installation Notes and Tips

Verify the hose routing, end diameters, and vehicle configuration before installation. This application note includes BMW Z3 models without Quick Connect, so confirm the connection style before ordering. Inspect adjoining clamps, radiator necks, and engine fittings for wear or corrosion, and replace any damaged sealing surfaces before installing the new hose.

Quality Assurance

Dayco manufactures this hose to published SAE cooling-system standards for fit and material consistency. The part is built as a replacement radiator coolant hose for the listed applications and is identified by Dayco part number 71532.