Denso 221-3704 Radiator

Overview of the Denso Radiator 221-3704 for Hyundai and Kia

The Denso radiator part number 221-3704 is designed specifically for select Hyundai and Kia models, including the Azera, Optima, and Sonata. This radiator ensures efficient engine cooling and includes a transmission oil cooler to support vehicle performance under various driving conditions.

• Core Height: 25.062 inches
• Core Width: 18.625 inches
• Core Thickness: 0.625 inches
• Transmission Oil Cooler Included
• Inlet Diameter: 1.375 inches
• Outlet Diameter: 1.375 inches

Detailed Specifications and Features

The Denso 221-3704 radiator features a core measuring 25.062 inches in height, 18.625 inches in width, and 0.625 inches in thickness, providing a balanced surface area for optimal heat dissipation. Both the inlet and outlet diameters are 1.375 inches, ensuring compatibility with the cooling system hoses of Hyundai Azera, Kia Optima, and Hyundai Sonata models. The integrated transmission oil cooler supports the vehicle’s transmission system by maintaining proper fluid temperature, which is critical for transmission longevity and performance.

Compatible Vehicles and Applications

This radiator is compatible with the following vehicles:

• Hyundai Azera
• Kia Optima
• Hyundai Sonata

It is engineered to replace original equipment radiators in these models, providing reliable cooling and transmission oil temperature regulation.

Common Issues Addressed by the Denso Radiator 221-3704

• Engine overheating due to inefficient heat dissipation
• Transmission fluid overheating affecting transmission performance
• Coolant leaks from damaged or corroded radiator cores
• Reduced cooling efficiency from clogged or worn radiator fins
• Incompatibility with OEM hose connections causing installation issues

Installation Notes and Tips

• Ensure the radiator core dimensions match the vehicle’s specifications before installation
• Check that inlet and outlet hose diameters (1.375 inches) align with existing hoses
• Drain coolant and transmission fluid before removal of the old radiator
• Inspect and replace any worn hoses or clamps during installation
• Bleed the cooling system properly after installation to avoid air pockets

Quality Assurance and Warranty Information

Denso radiators, including part number 221-3704, are manufactured to meet or exceed OEM standards for durability and performance. This radiator undergoes rigorous quality control to ensure reliable operation in Hyundai Azera, Kia Optima, and Hyundai Sonata vehicles. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.