Denso 221-3605 Radiator

Denso 221-3605 Radiator for Subaru Cooling Repair

The Denso 221-3605 radiator is built for Subaru cooling system service with OE-style fitment and construction. It is designed for 2008-2010 Subaru Impreza and 2005-2007 Subaru Legacy applications, with an integrated transmission oil cooler included for vehicles that use that setup.

Key Features

• OE-style radiator from Denso, a supplier to original equipment vehicle manufacturers
• Fits 2008-2010 Subaru Impreza and 2005-2007 Subaru Legacy
• Transmission oil cooler included
• Core dimensions: 13.3750 in. height, 27.0620 in. width, 0.6250 in. thickness
• Inlet and outlet diameters: 1.5620 in.
• Built to match OE configuration, tank design, fin pitch, and materials standards

Detailed Description

Denso Part Number 221-3605 is a direct-fit radiator for Subaru cooling system replacement work. It is engineered around OE specifications so the radiator matches the original configuration, dimensions, and connection sizes needed for proper engine temperature control. For Subaru Impreza and Subaru Legacy service, this radiator supports consistent coolant flow and heat transfer while also including the transmission oil cooler required on equipped vehicles.

Denso’s OE manufacturing background is reflected in the radiator’s fitment-focused design and durability testing. The 221-3605 is a practical choice when replacing a leaking, clogged, or damaged radiator on a 2008-2010 Subaru Impreza or a 2005-2007 Subaru Legacy. This part cross-references Subaru 45111-AG02A and 45119-FG000 for the same application.

What This Radiator Helps Address

• Engine overheating caused by restricted coolant flow
• Coolant loss from a cracked or leaking radiator tank or core
• Transmission cooling concerns on vehicles equipped with an oil cooler
• Temperature instability from worn or inefficient radiator internals
• Fitment issues when replacing an OE Subaru radiator

Installation Notes and Tips

Verify radiator dimensions, inlet and outlet size, and transmission cooler connections before installation. Flush the cooling system, inspect hoses and clamps, and replace degraded coolant as part of the repair. Confirm vehicle application by year and model: Fits 2008-2010 Subaru Impreza, N/A; Fits 2005-2007 Subaru Legacy, N/A.

Quality Assurance

Denso radiators are built using OE-level engineering standards and undergo durability and function testing before release. That manufacturing approach helps ensure reliable cooling performance and proper fitment for Subaru Impreza and Subaru Legacy applications.