Denso 221-3701 Radiator

Overview of the Denso Radiator 221-3701 for Hyundai and Kia

The Denso Radiator 221-3701 is engineered to provide reliable cooling performance for select Hyundai and Kia vehicles. Designed specifically for models like the Hyundai Sonata and Kia Optima, this radiator ensures efficient heat dissipation and supports optimal engine operation.

• Core Height: 15.75 inches
• Core Width: 27.875 inches
• Core Thickness: 0.625 inches
• Inlet Diameter: 1.375 inches
• Outlet Diameter: 1.375 inches
• Includes Transmission Oil Cooler

Detailed Specifications and Features

This Denso radiator features a core height of 15.75 inches and a width of 27.875 inches, providing a substantial surface area for effective cooling. The core thickness of 0.625 inches balances durability with efficient heat transfer. Both the inlet and outlet diameters measure 1.375 inches, ensuring compatibility with the vehicle’s cooling system hoses. Additionally, the integrated transmission oil cooler supports transmission fluid temperature regulation, which is critical for maintaining transmission performance and longevity in Hyundai Sonata and Kia Optima models.

Compatible Vehicles and Applications

This radiator is compatible with specific Hyundai and Kia vehicles, including:

• Hyundai Sonata
• Kia Optima

It is designed to replace original equipment radiators with part number 221-3701, providing a direct fit and maintaining factory cooling system specifications.

Common Issues Addressed by the Denso Radiator 221-3701

• Engine overheating due to radiator core damage or clogging
• Transmission overheating caused by inefficient transmission oil cooling
• Coolant leaks from worn or cracked radiator components
• Reduced cooling efficiency from corrosion or buildup inside the radiator
• Incompatibility or poor fitment with aftermarket radiators lacking proper dimensions

Installation Notes and Tips

When installing the Denso Radiator 221-3701, ensure the following:

• Verify compatibility with your Hyundai Sonata or Kia Optima model year and engine type
• Inspect and replace any worn hoses or clamps to prevent leaks
• Flush the cooling system before installation to remove debris and contaminants
• Check transmission fluid levels after installation due to the integrated transmission oil cooler
• Follow manufacturer torque specifications for mounting hardware

Quality Assurance and Warranty Information

Denso manufactures this radiator to meet or exceed OEM standards for durability and performance. The part number 221-3701 undergoes rigorous quality control to ensure reliable operation within the vehicle’s cooling system. Warranty coverage details should be confirmed with the point of purchase or Denso directly, as warranty terms may vary.