Denso 221-3243 Radiator

Denso 221-3243 Radiator for Acura TSX

The Denso 221-3243 radiator is built for 2009-2010 Acura TSX applications and follows OE-style dimensions for proper cooling system fitment. With an integrated transmission oil cooler and 1.2500-inch inlet and outlet connections, it supports direct replacement needs for the Acura TSX radiator application.

Key Features

• Fits 2009-2010 Acura TSX
• Part number: 221-3243
• Core height: 15.7500 in.
• Core width: 30.1870 in.
• Core thickness: 0.6250 in.
• Transmission oil cooler included
• Inlet diameter: 1.2500 in.
• Outlet diameter: 1.2500 in.

OE-Style Cooling Performance

Denso supplies radiators to original equipment vehicle manufacturers and applies that OE experience to this replacement radiator. The core dimensions, tank configuration, fin pitch, and materials are engineered to match manufacturer standards, helping maintain proper engine temperature control in the 2009-2010 Acura TSX. If you are replacing a worn or leaking Acura TSX radiator, the Denso 221-3243 provides the fitment and cooling-system layout expected for this application.

This part cross-references Acura (e.g., 19010-RL5-A51) for the same application.

Common Problems This Radiator Can Address

• Coolant leaks from a damaged or corroded radiator
• Overheating caused by restricted coolant flow
• Poor heat transfer from a clogged or aging core
• Transmission cooling concerns related to a failed cooler circuit
• Fitment issues from an incorrect Acura TSX replacement radiator

Installation Notes and Tips

Verify the core dimensions, inlet and outlet sizes, and transmission cooler layout before installation. Flush the cooling system, inspect hoses and clamps, and confirm the radiator mounts and fan shroud alignment match the vehicle before filling with the correct coolant. For best results, check for contamination in the cooling and transmission circuits before putting the vehicle back into service.

Quality Assurance

Denso radiators are built to OE standards and undergo durability and function testing before release. That manufacturing approach helps support reliable performance in normal driving and demanding operating conditions.