Dayco 72563 Radiator Coolant Hose - Upper - Driver Side

Curved Radiator Hose for Mazda 3

Dayco Curved Radiator Hose 72563 is a radiator coolant hose built for the upper driver side cooling circuit on select Mazda 3 and Mazda 3 Sport applications. It uses EPDM construction for coolant-system durability and includes a protective sleeve for added abrasion resistance in routed engine-bay locations.

Key Features

• EPDM rubber construction for radiator coolant service
• Black finish for a clean OE-style appearance
• Single I.D. hose design with 1 9/32 in. inside diameter at both ends
• Protective sleeve included for added surface protection
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Curved radiator hose profile for upper driver side routing

Product Details

Dayco 72563 is part of the Curved Radiator Hose line, a product line focused on molded coolant hoses that follow factory routing and fitment requirements. This hose is specified for 2010-2013 Mazda 3, upper driver side, and 2010-2013 Mazda 3 Sport, upper driver side, with the 2010 Mazda 3 Sport and 2012-2013 Mazda 3 Sport applications included in the confirmed fitment data. The hose measures 18 in. in trunk height and is engineered as a single I.D. hose for consistent connection sizing at both ends. This part cross-references Gates 24279 for the same application.

Common Repair Uses

• Replacing a cracked or softened upper radiator hose
• Restoring coolant flow in the Mazda 3 cooling system
• Addressing coolant seepage at hose connection points
• Correcting hose collapse, swelling, or heat-related deterioration
• Servicing a damaged curved hose on the upper driver side

Installation Notes

Verify the hose routing and end diameters before installation. Inspect the radiator neck, engine connection points, and clamps for wear or corrosion, and replace any damaged sealing surfaces before installing the new hose. Confirm the hose follows the original curved path on the upper driver side to avoid kinks or tension in the cooling system.

Quality Assurance

Dayco manufactures this hose to meet SAE J20R4 Class D-1 and SAE J1684 Type EC requirements, supporting proper coolant-hose performance in the specified Mazda 3 and Mazda 3 Sport applications.