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Denso 221-3509 Radiator
| Brand | Denso 221-3509 |
|---|---|
| Core Height | 14.5000 |
| Core Thickness | 0.6250 |
| Core Width | 25.5620 |
| Inlet Diameter | 0.9370 |
| Outlet Diameter | 0.9370 |
| Transmission Oil Cooler Included | NO |
| Fits | Mazda · 5 vehicles |
OE experience. Built to meet strict OE standards for reliable fit and performance.
Engine cooling function. Helps maintain proper cooling for dependable engine operation.
Durability tested. Passed rigorous function and durability checks for demanding use.
Cross-references APDI 8012894, CSF 3301 and DPI Performance Racing Products 2894 for the same application. See all 9.
Denso 221-3509 Radiator for Mazda 5
The Denso 221-3509 radiator is a direct-fit cooling system replacement for select 2006-2010 Mazda 5 models. Built to OE-level dimensions and materials, it is engineered for consistent engine temperature control, accurate fitment, and dependable everyday operation.
Key Features
- Core height: 14.5000 in.
- Core width: 25.5620 in.
- Core thickness: 0.6250 in.
- Inlet diameter: 0.9370 in.
- Outlet diameter: 0.9370 in.
- No transmission oil cooler included
- OE-style radiator configuration for proper fit and cooling performance
Detailed Description
Denso radiators are built from the company’s OE supply experience, with configurations, tank design, fin pitch, core dimensions, and materials selected to meet original manufacturer standards. The 221-3509 follows those specifications to support stable coolant flow and efficient heat transfer in the Mazda 5 cooling system. For drivers searching for a Mazda 5 radiator replacement, Denso 221-3509 offers the fitment and construction expected from an OE-focused cooling component.
This part cross-references Mazda LFB7-15-200A for the same application. It also aligns with aftermarket references such as Spectra Premium CU2894 and CSF 3301.
Vehicle Fitment
- Fits 2006-2010 Mazda 5, N/A
Common Issues This Radiator May Address
- Overheating caused by a leaking or restricted radiator
- Coolant loss from cracked tanks or damaged core passages
- Reduced heat dissipation from an aging radiator core
- Temperature instability during stop-and-go driving
- Cooling system service needs on a Mazda 5 radiator replacement
Installation Notes and Tips
Verify inlet and outlet hose sizes before installation. Inspect radiator hoses, clamps, and coolant condition at the same time to reduce repeat service. Confirm that the radiator mounts and surrounding cooling components are clean and undamaged before fitting the new unit. After installation, refill with the correct coolant and bleed the system according to vehicle service procedures.
Quality Assurance
Denso states that its radiators undergo durability and function testing before release. The 221-3509 is built to support reliable cooling performance and fitment for the listed Mazda 5 applications.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2010 | Mazda | 5 | N/A | — |
| 2009 | Mazda | 5 | N/A | — |
| 2008 | Mazda | 5 | N/A | — |
| 2007 | Mazda | 5 | N/A | — |
| 2006 | Mazda | 5 | N/A | — |
| No rows match your filter. | ||||