Denso 221-3257 Radiator

Denso Radiator for 2005-2007 Honda Accord

This Denso radiator, part number 221-3257, is built for 2005-2007 Honda Accord applications and supports dependable engine cooling with OE-style fitment. It includes an integrated transmission oil cooler and uses core dimensions that match the listed application requirements.

Key Features

• Fits 2005-2007 Honda Accord
• Part number 221-3257
• Core height: 14.7500
• Core width: 28.2500
• Core thickness: 1.0000
• Inlet diameter: 0.9370
• Outlet diameter: 0.9370
• Transmission oil cooler included

Detailed Description

Denso 221-3257 is a radiator engineered for the 2005-2007 Honda Accord, with dimensions and construction details that align with OE replacement requirements. The 14.7500-inch core height, 28.2500-inch core width, and 1.0000-inch core thickness support proper coolant flow and heat exchange for everyday driving and demanding operating conditions. The included transmission oil cooler adds an important cooling path for vehicles equipped with automatic transmission cooling through the radiator.

Denso supplies radiators to OE vehicle manufacturers worldwide, and this part reflects that background through its fitment-focused design and durability testing. If you are replacing a worn or leaking radiator on a Honda Accord, part number 221-3257 provides a direct-match solution for the listed model years. This part cross-references Honda 19010-RCJ-A52 for the same application.

What This Radiator Helps Address

• Engine overheating caused by a restricted or leaking radiator
• Coolant loss from cracked tanks or damaged core passages
• Poor heat transfer from an aging Honda Accord radiator
• Transmission fluid temperature control concerns on equipped vehicles
• Fitment issues from using the wrong core size or hose connection diameter

Installation Notes and Tips

Verify the inlet and outlet diameters before installation to confirm hose match-up. Inspect radiator hoses, clamps, and coolant condition during replacement, and flush the cooling system if contamination is present. Confirm that the vehicle is a 2005-2007 Honda Accord before ordering, since fitment is application-specific. Part number 221-3257 is listed for N/A position use.

Quality Assurance

Denso states that its radiators are built to OE standards and undergo durability and function testing before release. That OE-focused manufacturing approach supports consistent fitment and reliable cooling performance for the Honda Accord application.