Denso 221-3220 Radiator

Denso 221-3220 Radiator for Honda Civic

The Denso 221-3220 radiator is an OE-style cooling replacement built for 2001-2005 Honda Civic applications with DENSO radiator fitment. It is engineered around core dimensions, tank design, fin pitch, and materials that align with original equipment standards for consistent engine cooling and fitment.

With an integrated transmission oil cooler and inlet/outlet sizing matched to the application, this radiator supports dependable heat transfer for daily driving and demanding conditions. It is a direct-fit cooling component for Honda Civic owners looking for a radiator replacement that follows OE specifications.

Key Features

• Fits 2001-2005 Honda Civic, w/ DENSO Radiator
• Part number: 221-3220
• Core height: 13.7500 in.
• Core width: 25.8750 in.
• Core thickness: 0.6250 in.
• Transmission oil cooler included
• Inlet diameter: 1.1250 in.
• Outlet diameter: 1.1250 in.

Detailed Description

Denso 221-3220 is a radiator replacement for 2001-2005 Honda Civic models listed with DENSO radiator fitment. DENSO supplies radiators to OE vehicle manufacturers worldwide, and this unit reflects that experience through OE-matched configuration, dimensions, and materials. The radiator is built to support proper engine temperature control and stable cooling-system performance.

This part cross-references APDI 8012354 and CSF 2800 for the same application. The 221-3220 radiator is a practical choice when replacing a worn or leaking Honda Civic radiator and when maintaining factory-style cooling system layout matters.

Common Problems This Radiator Can Address

• Coolant leaks from a damaged or corroded radiator core
• Overheating caused by restricted heat transfer
• Transmission fluid temperature concerns when the cooler circuit is part of the system
• Cracked tanks or weakened seams from age and heat cycling
• Reduced cooling efficiency in a high-mileage Honda Civic

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 confirm the fan shroud and mounting points are in good condition. After installation, refill with the correct coolant mixture and bleed air from the system according to Honda service procedures.

Quality Assurance

Denso states that its radiators are built to OE standards and undergo durability and function testing before release. That manufacturing approach supports consistent fitment and reliable cooling performance for Honda Civic radiator replacement needs.