Denso 221-3309 Radiator

Denso Radiator for Mitsubishi Diamante

Restore proper engine cooling with this Denso radiator, part number 221-3309, built for 1997-2004 Mitsubishi Diamante applications. It is an OE-style replacement engineered around core dimensions, tank design, fin pitch, and materials that align with original equipment standards.

Key Features

• Core height: 15.7500 in.
• Core width: 28.2500 in.
• Core thickness: 1.0000 in.
• Inlet diameter: 1.3750 in.
• Outlet diameter: 1.3750 in.
• Transmission oil cooler included
• Built by Denso, a major OE radiator supplier

Detailed Description

Denso 221-3309 is a radiator for the Mitsubishi Diamante that follows OE-focused design and durability standards. Denso uses its original equipment experience to produce radiators with the correct configuration, fitment, and cooling performance for demanding daily driving conditions. This radiator cross-references Mitsubishi MR431051 for the same application.

For buyers searching for a 1997-2004 Mitsubishi Diamante radiator, Denso 221-3309 provides the dimensions and cooling layout needed for direct replacement service. It is also a strong match for shoppers comparing Denso radiator 221-3309 against other OE-style cooling system parts.

What It Helps Address

• Engine overheating from a restricted or leaking radiator
• Coolant loss caused by cracked tanks or damaged core sections
• Transmission fluid temperature control when the radiator-mounted cooler is in use
• Reduced cooling efficiency from worn internal passages or fin damage
• Fitment issues when replacing the original Mitsubishi Diamante radiator

Installation Notes and Tips

Verify inlet and outlet hose sizes before installation. Inspect hoses, clamps, and coolant condition at the same time to reduce repeat cooling-system service. Flush the system if contamination or corrosion is present, and confirm proper bleed procedure after installation to remove trapped air.

Quality Assurance

Denso radiators are built to OE standards and undergo durability and function testing before release. That manufacturing approach supports consistent fitment and dependable cooling performance for Mitsubishi Diamante applications.