Denso 221-3210 Radiator

Denso Radiator for Acura RL

This Denso radiator, part number 221-3210, is built for 1996-2004 Acura RL applications and supports dependable engine cooling with OE-style fitment. It includes an integrated transmission oil cooler and uses core dimensions that match the vehicle’s cooling requirements.

Key Features

• Fits 1996-2004 Acura RL
• Part number 221-3210
• Core height: 17.7500 in.
• Core width: 26.5000 in.
• Core thickness: 0.6250 in.
• Inlet diameter: 1.2500 in.
• Outlet diameter: 1.2500 in.
• Transmission oil cooler included
• OE-style radiator configuration for direct replacement use

Detailed Description

Denso 221-3210 is a replacement radiator engineered for Acura RL cooling system service. Denso supplies radiators to OE vehicle manufacturers worldwide, and this unit reflects that OE-focused experience through its tank design, fin pitch, core dimensions, and material selection. For Acura RL owners needing a radiator replacement, this part number 221-3210 provides the correct size and connection points for the listed model years.

This radiator is a direct-fit cooling component for 1996-2004 Acura RL vehicles and includes a transmission oil cooler to support automatic transmission fluid temperature control. This part cross-references Spectra Premium CU1912 and CSF 2448 for the same application.

What This Radiator Helps Address

• Engine overheating caused by a leaking or restricted radiator
• Coolant loss from cracked tanks or damaged core passages
• Transmission fluid temperature issues tied to a failed cooler circuit
• Poor heat transfer from an aging or corroded radiator
• Fitment problems when replacing the original Acura RL radiator

Installation Notes and Tips

Verify inlet and outlet hose sizes before installation and compare the existing radiator to the new unit for mounting and connection alignment. Flush the cooling system, inspect hoses and clamps, and refill with the correct coolant mixture after installation. Confirm transmission cooler line routing and check for leaks once the engine reaches operating temperature.

Quality Assurance

Denso radiators are built to meet OE manufacturer standards and undergo durability and function testing before release. That testing focus helps ensure consistent cooling performance and fitment for Acura RL applications.