OE Quality
60-Day Returns

Denso 221-3501 Radiator
Overview of the Denso Radiator for Mazda CX-7
The Denso 221-3501 radiator is designed specifically for the Mazda CX-7, providing reliable cooling performance. This radiator includes a transmission oil cooler, making it a comprehensive solution for your vehicle's cooling needs.
- Core Height: 17.687 inches
- Core Width: 29.437 inches
- Core Thickness: 1.060 inches
- Inlet Diameter: 1.25 inches
- Outlet Diameter: 1.25 inches
- Includes Transmission Oil Cooler
Detailed Product Description
The Denso 221-3501 radiator features a core measuring 17.687 inches in height, 29.437 inches in width, and 1.060 inches in thickness, ensuring efficient heat dissipation for the Mazda CX-7. Both the inlet and outlet diameters are 1.25 inches, compatible with the vehicle's cooling system hoses. The integrated transmission oil cooler supports the transmission system by maintaining optimal fluid temperatures, which helps prevent overheating and extends transmission life.
Applications and Common Issues Addressed
- Overheating engine due to inefficient radiator performance
- Transmission fluid overheating affecting gear shifting
- Coolant leaks from damaged or worn radiator cores
- Reduced cooling efficiency from clogged or corroded radiators
- Maintaining proper engine temperature for Mazda CX-7 models
Installation Notes and Tips
When installing the Denso 221-3501 radiator on a Mazda CX-7, ensure all hose connections match the 1.25-inch inlet and outlet diameters for a secure fit. It is recommended to drain the coolant and transmission fluid before removal of the old radiator. Inspect all mounting points and replace any worn hardware to prevent leaks or vibrations. After installation, refill fluids to manufacturer specifications and check for leaks during initial operation.
Quality Assurance and Warranty
Denso radiators are manufactured to meet OEM specifications, ensuring compatibility and durability for the Mazda CX-7. The 221-3501 radiator undergoes rigorous quality control to maintain performance standards. While specific warranty details may vary, Denso products typically include coverage against defects in materials and workmanship. Consult product documentation for exact warranty terms.
| Brand | Denso |
| Part Number | 221-3501 |
| Core Height | 17.6870 |
| Core Thickness | 1.0600 |
| Core Width | 29.4370 |
| Inlet Diameter | 1.2500 |
| Outlet Diameter | 1.2500 |
| Transmission Oil Cooler Included | YES |
This part fits 3 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2009 | Mazda | CX-7 | N/A | |
| 2008 | Mazda | CX-7 | N/A | |
| 2007 | Mazda | CX-7 | N/A |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.