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Denso 221-3256 Radiator
| Brand | Denso 221-3256 |
|---|---|
| Core Height | 15.7500 |
| Core Thickness | 0.6250 |
| Core Width | 27.3750 |
| Inlet Diameter | 1.2500 |
| Outlet Diameter | 1.2500 |
| Transmission Oil Cooler Included | YES |
| Fits | Honda · 5 vehicles |
OE experience. Built to OE standards for reliable performance and fit.
Radiator performance. Helps maintain proper engine cooling and function.
Durability tested. Passed strict function and durability checks for demanding use.
Cross-references APDI 8012599, CSF 3168 and DPI Performance Racing Products 2599 for the same application. See all 12.
Denso 221-3256 Radiator for Honda Accord
The Denso 221-3256 radiator is built for 2003-2007 Honda Accord applications with a Valeo radiator setup. It combines OE-style dimensions with an integrated transmission oil cooler to support consistent engine temperature control and dependable cooling performance.
Key Features
- Direct-fit radiator for 2003-2007 Honda Accord, w/ Valeo Radiator
- Core dimensions: 15.7500 in. height, 27.3750 in. width, 0.6250 in. thickness
- 1.2500 in. inlet and 1.2500 in. outlet diameters
- Transmission oil cooler included
- OE-focused construction from Denso, a radiator supplier to global car makers
Product Details
Denso Part Number 221-3256 is a replacement radiator engineered around OE specifications for the Honda Accord. Denso uses radiator configurations, tank design, fin pitch, core dimensions, and materials that align with manufacturer standards, helping the cooling system maintain proper engine operating temperature and stable function. This radiator is a practical choice for Accord owners replacing a worn or leaking unit on 2003-2007 models with a Valeo radiator arrangement. This part cross-references Honda (e.g., 19010-RAA-A02, 19010-RAA-A52) for the same application.
What It Helps Address
- Coolant leaks from a damaged or corroded radiator
- Overheating caused by restricted coolant flow or reduced heat transfer
- Transmission cooling concerns when the radiator-mounted cooler is failing
- Fitment issues when replacing the original Honda Accord radiator
- Cooling system performance loss from aging core materials or tank wear
Installation Notes and Tips
Verify the vehicle is a 2003-2007 Honda Accord with a Valeo radiator before ordering. Confirm inlet and outlet hose sizes, mounting points, and transmission cooler line connections match the original unit. Flush the cooling system, inspect hoses and clamps, and refill with the correct coolant after installation. The Denso 221-3256 is also referenced by APDI 8012599 and Spectra Premium CU2797.
Quality Assurance
Denso supplies radiators to OE vehicle manufacturers and subjects its radiators to durability and function testing before release. That OE-based development process supports consistent fitment and reliable cooling performance for demanding daily driving conditions.
| Year | Make | Model | Transmission | Position | Notes |
|---|---|---|---|---|---|
| 2007 | Honda | Accord | Automatic | N/A | w/ Valeo Radiator |
| 2006 | Honda | Accord | Automatic | N/A | w/ Valeo Radiator |
| 2005 | Honda | Accord | Automatic | N/A | w/ Valeo Radiator |
| 2004 | Honda | Accord | Automatic | N/A | w/ Valeo Radiator |
| 2003 | Honda | Accord | Automatic | N/A | w/ Valeo Radiator |
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