OE Quality
60-Day Returns

Denso 221-3207 Radiator
Overview of Denso Radiator for Honda Civic
The Denso 221-3207 radiator is engineered specifically for Honda Civic models, providing reliable cooling performance. Designed with precise core dimensions and integrated transmission oil cooler, this radiator supports efficient engine temperature management.
Key Features of Denso Radiator 221-3207
- Core Height: 13.75 inches
- Core Width: 13.687 inches
- Core Thickness: 0.625 inches
- Transmission Oil Cooler Included for enhanced cooling
- Inlet and Outlet Diameter: 1.125 inches each
Detailed Product Description
This Denso radiator, part number 221-3207, is designed to meet the cooling requirements of Honda Civic vehicles. The core dimensions—13.75 inches in height, 13.687 inches in width, and 0.625 inches in thickness—ensure optimal heat dissipation. The inclusion of a transmission oil cooler supports the vehicle’s transmission system by maintaining proper fluid temperature, which is critical for transmission longevity and performance. Both the inlet and outlet diameters measure 1.125 inches, matching OEM specifications for seamless integration.
Applications and Common Issues Addressed
- Overheating engine due to radiator failure
- Transmission fluid overheating affecting shifting performance
- Coolant leaks from damaged or corroded radiator cores
- Reduced cooling efficiency from clogged or worn radiators
- Maintaining proper engine temperature for Honda Civic models
Installation Notes and Tips
When installing the Denso 221-3207 radiator on a Honda Civic, ensure all hose connections match the 1.125-inch inlet and outlet diameters. Verify that the transmission oil cooler lines are properly connected to avoid leaks. It is recommended to flush the cooling system before installation to remove debris and contaminants. Use OEM-quality coolant and follow torque specifications for mounting bolts to prevent damage.
Quality Assurance and Warranty
Denso radiators are manufactured to meet strict quality standards, ensuring durability and reliable performance. This radiator is built to OEM specifications for fit and function on Honda Civic vehicles. While specific warranty details may vary, Denso products typically come with a limited warranty covering defects in materials and workmanship.
| Brand | Denso |
| Part Number | 221-3207 |
| Core Height | 13.7500 |
| Core Thickness | 0.6250 |
| Core Width | 13.6870 |
| Inlet Diameter | 1.1250 |
| Outlet Diameter | 1.1250 |
| Transmission Oil Cooler Included | YES |
This part fits 2 vehicles. Search below:
| Year | Make | Model | Transmission | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|
| 2000 | Honda | Civic | Automatic | GAS | N/A | |
| 1999 | Honda | Civic | Automatic | GAS | 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.