Denso 221-9491 Radiator

Overview of the Denso Radiator 221-9491

The Denso Radiator part number 221-9491 is designed specifically for select BMW models, including the 228i, 320i, 328i, 335i, 335i xDrive, 428i, 435i, 435i xDrive, i3, and i3s. This radiator provides essential cooling performance to maintain optimal engine temperatures under various driving conditions.

• Core Height: 23.6220 inches
• Core Width: 14.0748 inches
• Core Thickness: 1.3386 inches
• Inlet Diameter: 1.5 inches
• Outlet Diameter: 1.5 inches
• Transmission Oil Cooler: Not included

Details on the Denso Radiator Product Line

The Denso Radiator product line focuses on delivering reliable cooling components engineered to meet or exceed OEM specifications. Radiators in this line are designed with precise core dimensions and flow characteristics to ensure efficient heat dissipation. The 221-9491 radiator exemplifies this approach by matching the exact core size and inlet/outlet diameters required for proper fitment and performance in compatible BMW vehicles.

Technical Description and Compatibility

This radiator features a core height of 23.6220 inches, a core width of 14.0748 inches, and a core thickness of 1.3386 inches, providing a balanced surface area for effective heat exchange. Both the inlet and outlet diameters measure 1.5 inches, ensuring compatibility with the cooling system hoses of the specified BMW models. Note that this radiator does not include a transmission oil cooler, so it is intended for vehicles where a separate cooler is used or not required.

Common Applications and Problem Resolution

• Replacement for leaking or damaged radiators in BMW 228i, 320i, 328i, 335i, 335i xDrive, 428i, 435i, 435i xDrive, i3, and i3s models
• Addresses overheating issues caused by inefficient or clogged radiator cores
• Resolves coolant leaks due to corrosion or physical damage
• Restores proper coolant flow with matching inlet and outlet diameters
• Supports engine temperature regulation for improved performance and longevity

Installation Notes and Tips

When installing the Denso Radiator 221-9491, ensure that the core dimensions and hose diameters match the vehicle’s specifications. Properly secure all hose connections to prevent leaks. It is recommended to flush the cooling system before installation to remove any debris or contaminants. Verify that the radiator mounting points align correctly with the vehicle frame to avoid stress or damage during operation.

Quality Assurance and Warranty

Denso radiators are manufactured to meet strict quality standards, ensuring durability and reliable performance. While specific warranty details for part number 221-9491 should be confirmed with the supplier, Denso typically offers coverage against manufacturing defects. This radiator is engineered to provide consistent cooling efficiency for the compatible BMW models listed.