Denso 221-3425 Radiator

Overview of the Denso Radiator 221-3425 for Infiniti FX35, FX50, QX70

The Denso radiator part number 221-3425 is engineered to provide reliable cooling performance for Infiniti FX35, FX50, and QX70 models. Designed with precise core dimensions and integrated transmission oil cooler, this radiator supports efficient engine temperature regulation under various driving conditions.

• Core Height: 25.062 inches
• Core Width: 20.562 inches
• Core Thickness: 1.000 inch
• Inlet Diameter: 1.375 inches
• Outlet Diameter: 1.375 inches
• Includes Transmission Oil Cooler

Detailed Specifications and Features

The Denso 221-3425 radiator features a core height of 25.062 inches and a width of 20.562 inches, providing ample surface area for heat dissipation. Its 1-inch core thickness balances cooling efficiency with compact design. Both the inlet and outlet diameters measure 1.375 inches, ensuring compatibility with the vehicle’s existing coolant hoses. This radiator also includes an integrated transmission oil cooler, which helps maintain optimal transmission fluid temperature, contributing to overall drivetrain longevity.

Compatible Infiniti Models and Applications

This radiator is specifically compatible with Infiniti FX35, FX50, and QX70 models. It is designed to meet the cooling demands of these vehicles, supporting engine performance and preventing overheating during normal and heavy-duty operation.

• Prevents engine overheating in Infiniti FX35, FX50, QX70
• Maintains transmission fluid temperature with built-in oil cooler
• Supports efficient heat exchange with optimized core dimensions
• Replaces worn or damaged radiators to restore cooling system function
• Helps avoid coolant leaks and pressure loss

Installation Notes and Tips

When installing the Denso radiator 221-3425, ensure all hose connections match the 1.375-inch inlet and outlet diameters for a secure fit. Verify that the transmission oil cooler lines are properly connected to maintain transmission cooling. It is recommended to flush the cooling system before installation to remove debris and contaminants. Proper torque specifications should be followed for mounting bolts to avoid damage.

Quality Assurance and Warranty Information

Denso radiators are manufactured to meet OEM standards for durability and performance. The 221-3425 radiator undergoes rigorous quality control to ensure reliable operation. While specific warranty terms may vary, Denso typically offers coverage against defects in materials and workmanship, providing confidence in product longevity for Infiniti FX35, FX50, and QX70 owners.