Koyorad A2861 Radiator

Koyorad A2861 Radiator for Mazda MX-5

The Koyorad A2861 radiator is an OE-equivalent replacement built for 2006-2015 Mazda MX-5 and Mazda MX-5 Miata applications. It combines an aluminum core with plastic tanks and includes an internal transmission oil cooler for direct-fit cooling system service.

Key Features

• Fits 2006-2015 Mazda MX-5, N/A
• Fits 2006-2015 Mazda MX-5 Miata, N/A
• Aluminum core with a single-row design
• Plastic tank construction
• Core dimensions: 21.625 in. height, 17.25 in. width, 0.625 in. thickness
• Inlet and outlet diameter: 1.25 in.
• Internal transmission oil cooler included
• Transmission oil cooler diameter: 1 in.

Product Details

Koyorad Radiator A2861 is engineered as a direct replacement radiator for Mazda MX-5 and Mazda MX-5 Miata models from 2006 through 2015. The radiator uses an aluminum core for efficient heat transfer and plastic end tanks for OE-style fitment. With the internal transmission oil cooler already integrated, this unit supports vehicles that require radiator-based transmission fluid cooling in the original configuration. Koyorad focuses on replacement radiators built to match factory specifications closely, making this part a practical choice for restoring cooling system performance on the MX-5 platform.

What This Radiator Helps Address

• Overheating caused by a worn or restricted radiator core
• Coolant leaks from aging plastic tanks or core seams
• Reduced cooling efficiency from corrosion or internal buildup
• Transmission fluid temperature control issues when the factory cooler is part of the system
• Cooling system service needs on high-mileage Mazda MX-5 and Mazda MX-5 Miata vehicles

Installation Notes and Tips

Verify inlet and outlet hose sizes before installation and confirm the vehicle uses the radiator-mounted transmission oil cooler configuration. Flush the cooling system, inspect hoses and clamps, and replace any worn seals or related components during service. Proper bleeding of the cooling system after installation helps reduce trapped air and supports stable operating temperatures.

Quality Assurance

Koyorad builds OE-equivalent replacement radiators using application-specific engineering and manufacturing experience. Part number A2861 is intended to meet the fit and function expected for the listed Mazda MX-5 and Mazda MX-5 Miata applications.