OE Quality
60-Day Returns

Koyorad A2309 Radiator
Overview of the Koyorad A2309 Radiator
The Koyorad A2309 radiator is engineered for reliable cooling performance in Ford and Mercury SUVs. Designed specifically for models like the Explorer, Explorer Sport, Explorer Sport Trac, and Mountaineer, this radiator supports efficient engine and transmission cooling.
- Core dimensions: 20.75 inches height, 25.25 inches width, 1 inch thickness
- Constructed with a durable aluminum core for effective heat dissipation
- Single core row design optimized for cooling efficiency
- Plastic tank material for corrosion resistance and weight reduction
- Includes an internal transmission oil cooler with a 1.625-inch diameter
- 1.5-inch inlet and outlet diameters for coolant flow
- Compatible with Ford Explorer, Explorer Sport, Explorer Sport Trac, and Mercury Mountaineer
About the Koyorad Radiator Product Line
The Koyorad Radiator line focuses on delivering quality cooling components that meet or exceed OEM specifications. This product line emphasizes durable materials such as aluminum cores and plastic tanks to balance performance and longevity. The A2309 radiator is part of this line, offering integrated transmission oil cooling to support vehicle reliability under various driving conditions.
Detailed Product Description
The Koyorad A2309 radiator features a single-row aluminum core measuring 20.75 inches in height, 25.25 inches in width, and 1 inch thick. The aluminum core provides efficient heat transfer to maintain optimal engine temperatures. The plastic tanks reduce weight and resist corrosion, contributing to the radiator's durability. This radiator includes an internal transmission oil cooler with a 1.625-inch diameter, which helps regulate transmission fluid temperature, enhancing transmission performance and longevity. The inlet and outlet diameters are both 1.5 inches, ensuring proper coolant flow through the system.
Applications and Common Issues Addressed
- Replacement for leaking or damaged radiators in Ford Explorer and Mercury Mountaineer vehicles
- Resolves overheating issues caused by inefficient cooling systems
- Addresses transmission fluid overheating with integrated oil cooler
- Prevents coolant leaks from worn or cracked plastic tanks
- Improves engine cooling performance in Explorer Sport and Sport Trac models
Installation Notes and Tips
When installing the Koyorad A2309 radiator, ensure all hose connections match the 1.5-inch inlet and outlet diameters. Verify compatibility with your specific Ford or Mercury model year and engine configuration. Properly bleed the cooling system after installation to avoid air pockets. Inspect transmission lines connected to the internal oil cooler for secure fittings and no leaks.
Quality Assurance and Warranty
The Koyorad A2309 radiator is manufactured to meet OEM standards for fit, form, and function. The use of aluminum core and plastic tanks ensures durability and corrosion resistance. While specific warranty details are not provided, Koyorad products typically come with manufacturer-backed quality assurance to support reliable operation in compatible Ford and Mercury vehicles.
| Brand | Koyorad |
| Part Number | A2309 |
| Position | Koyorad Radiator |
| Core Height | 20.75 |
| Core Material | Aluminum |
| Core Row Quantity | 1 |
| Core Thickness | 1 |
| Core Width | 25.25 |
| Inlet Diameter | 1.5 |
| Internal Transmission Oil Cooler | Yes |
| Outlet Diameter | 1.5 |
| Tank Material | Plastic |
| Title | Koyorad a2309 radiator |
| Transmission Oil Cooler Diameter | 1.625 |
| Transmission Oil Cooler Included | Yes |
This part fits 13 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2003 | Ford | Explorer | 4.0L | V6 | N/A | |
| 2003 | Ford | Explorer Sport | 4.0L | V6 | N/A | SOHC; Koyorad Radiator |
| 2003 | Ford | Explorer Sport Trac | 4.0L | V6 | N/A | SOHC; Koyorad Radiator |
| 2002 | Ford | Explorer | 4.0L | V6 | N/A | |
| 2002 | Ford | Explorer Sport | 4.0L | V6 | N/A | SOHC; Koyorad Radiator |
| 2002 | Ford | Explorer Sport Trac | 4.0L | V6 | N/A | SOHC; Koyorad Radiator |
| 2001 | Ford | Explorer | 4.0L | V6 | N/A | |
| 2001 | Ford | Explorer Sport | 4.0L | V6 | N/A | SOHC; Koyorad Radiator |
| 2001 | Ford | Explorer Sport Trac | 4.0L | V6 | N/A | SOHC; Koyorad Radiator |
| 2001 | Mercury | Mountaineer | 4.0L | V6 | N/A | |
| 2000 | Ford | Explorer | 4.0L | V6 | N/A | |
| 2000 | Ford | Explorer | N/A | |||
| 2000 | Mercury | Mountaineer | 4.0L | V6 | N/A |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.