Denso 221-9405 Radiator

Overview of the Denso Radiator 221-9405 for BMW Models

The Denso radiator part number 221-9405 is designed specifically for select BMW vehicles, including the 128i, 325i, 325xi, 328i, 328i xDrive, 328xi, 330i, 330xi, and Z4 models. This radiator provides reliable cooling performance with precise core dimensions and inlet/outlet sizes tailored to these vehicles.

• Core Height: 23.62 inches
• Core Width: 18.86 inches
• Core Thickness: 1.06 inches
• Inlet Diameter: 1.52 inches
• Outlet Diameter: 1.52 inches
• Transmission Oil Cooler: Not included

Detailed Specifications and Design Features

The Denso 221-9405 radiator features a core height of 23.62 inches and a width of 18.86 inches, providing an optimal surface area for heat dissipation. The core thickness of 1.06 inches ensures efficient coolant flow and heat exchange. Both the inlet and outlet diameters measure 1.52 inches, matching OEM specifications for a direct fit without modifications. This radiator does not include a transmission oil cooler, making it suitable for BMW models that use separate transmission cooling systems.

Compatible BMW Models and Applications

This radiator is compatible with a range of BMW vehicles, including the 128i, 325i, 325xi, 328i, 328i xDrive, 328xi, 330i, 330xi, and Z4. It is designed to meet the cooling demands of these models, ensuring engine temperature regulation under various driving conditions.

• Overheating issues due to radiator core damage or clogging
• Coolant leaks from cracked or corroded radiator cores
• Reduced cooling efficiency from bent or damaged fins
• Replacement of worn or failing OEM radiators
• Maintaining optimal engine temperature for performance and longevity

Installation Notes and Tips

When installing the Denso radiator 221-9405, ensure all hose connections match the 1.52-inch inlet and outlet diameters for a secure fit. Verify that the radiator core dimensions align with the vehicle’s mounting points to avoid installation issues. It is recommended to flush the cooling system before installation to remove debris and contaminants. Properly bleed the cooling system after installation to prevent air pockets and ensure efficient coolant circulation.

Quality Assurance and Warranty Information

Denso radiators are manufactured to meet or exceed OEM standards, providing reliable cooling performance and durability. The 221-9405 radiator undergoes rigorous quality control testing to ensure fitment accuracy and material integrity. Warranty coverage details should be confirmed at the point of purchase, as they may vary by distributor or region.