Part #: 221-3503

Denso 221-3503 Radiator

⚙️ 7 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Mazda, Miata
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Overview of Denso Radiator for Mazda Miata

The Denso radiator part number 221-3503 is designed specifically for Mazda Miata models, providing reliable cooling performance. This radiator includes a transmission oil cooler, making it a comprehensive solution for engine and transmission temperature management.

  • Core Height: 12.625 inches
  • Core Width: 25.312 inches
  • Core Thickness: 0.625 inches
  • Inlet Diameter: 1.25 inches
  • Outlet Diameter: 1.25 inches
  • Includes Transmission Oil Cooler

Detailed Radiator Specifications

The Denso 221-3503 radiator features a core measuring 12.625 inches in height, 25.312 inches in width, and 0.625 inches in thickness. These dimensions ensure efficient heat dissipation for the Mazda Miata's engine. The radiator also includes a built-in transmission oil cooler with 1.25-inch inlet and outlet diameters, allowing it to manage both engine coolant and transmission fluid temperatures effectively. This dual functionality supports optimal vehicle performance and longevity.

Compatible Vehicles and Applications

This radiator is compatible with Mazda Miata models, engineered to meet the specific cooling requirements of this vehicle. It is suitable for addressing common cooling system issues such as:

  • Overheating due to radiator core damage or clogging
  • Transmission fluid overheating affecting shifting performance
  • Leaks or cracks in the radiator core or tanks
  • Reduced cooling efficiency from worn or corroded components
  • Replacement of original equipment radiator for maintenance or repair

Installation Notes and Tips

When installing the Denso 221-3503 radiator on a Mazda Miata, ensure all hose connections match the 1.25-inch inlet and outlet diameters. Properly flush the cooling system before installation to prevent contamination. Verify that the transmission oil cooler lines are correctly connected to maintain transmission cooling. Follow manufacturer torque specifications for mounting hardware to avoid damage.

Quality Assurance and Warranty

Denso radiators are manufactured to meet OEM standards for fit, form, and function. The 221-3503 radiator undergoes rigorous quality control to ensure durability and performance. While specific warranty details are not provided here, Denso products typically come with a limited warranty covering defects in materials and workmanship. Consult the product documentation or supplier for exact warranty terms.

BrandDenso
Part Number221-3503
Core Height12.6250
Core Thickness0.6250
Core Width25.3120
Transmission Oil Cooler IncludedYes
Inlet Diameter1.2500
Outlet Diameter1.2500

This part fits 7 vehicles. Search below:

YearMakeModelTransmissionPositionNotes
2005MazdaMiataAutomaticN/A
2004MazdaMiataAutomaticN/A
2003MazdaMiataAutomaticN/A
2002MazdaMiataAutomaticN/A
2001MazdaMiataAutomaticN/A
2000MazdaMiataAutomaticN/A
1999MazdaMiataAutomaticN/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:

8012268

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.