Denso 221-9166 Radiator

Denso 221-9166 Radiator Overview

Denso 221-9166 is an OE-style radiator built for direct replacement cooling performance on select Mitsubishi applications. It is engineered around core dimensions, tank design, fin pitch, and materials that align with original equipment standards for dependable engine temperature control.

Compatible with 2008-2011 Mitsubishi Lancer and 2007-2008 Mitsubishi Outlander, this radiator supports proper heat transfer in daily driving and demanding conditions. The Denso 221-9166 radiator is a practical choice when you need a replacement that matches the vehicle’s cooling system requirements.

Key Features

• Core height: 27.5591 in.
• Core width: 15.8661 in.
• Core thickness: 1.0236 in.
• Inlet diameter: 1.3780 in.
• Outlet diameter: 1.3976 in.
• Transmission oil cooler included: No
• OE-focused construction for fitment and cooling-system consistency

Detailed Description

Denso 221-9166 is a radiator replacement for Mitsubishi Lancer and Mitsubishi Outlander models listed in the fitment data. Denso supplies radiators to original equipment vehicle manufacturers worldwide, and this part reflects that OE engineering approach with attention to configuration, dimensions, and durability testing. The result is a radiator built to support stable coolant flow and efficient heat dissipation in the engine cooling system.

This part cross-references Spectra Premium CU2978 for the same application. For shoppers searching for a 2008-2011 Mitsubishi Lancer radiator or a 2007-2008 Mitsubishi Outlander radiator, part number 221-9166 provides a direct-reference option with the listed inlet and outlet sizing.

What It Helps Address

• Overheating caused by a worn or inefficient radiator
• Coolant temperature instability during stop-and-go driving
• Leaks or corrosion in the original radiator assembly
• Reduced heat rejection from an aging cooling core
• Fitment issues when replacing a damaged Mitsubishi Lancer or Outlander radiator

Installation Notes and Tips

Verify the vehicle’s build details before installation, especially for 2008 Mitsubishi Outlander Federal models built to 11/2007 and vehicles without a sensor. Confirm inlet and outlet hose sizing, mounting points, and cooling-system routing before removing the original unit. Flush the cooling system, inspect hoses and clamps, and refill with the correct coolant specification after installation.

Quality Assurance

Denso radiators are built to OE standards and undergo durability and function testing before release. That manufacturing approach supports consistent performance, fitment, and reliability for Mitsubishi cooling-system replacement needs.