Denso 221-9279 Radiator

Denso Radiator for Toyota 4Runner

The Denso 221-9279 radiator is built for Toyota 4Runner cooling system service with OE-style fitment and construction. It is a direct replacement radiator for 2010-2020 Toyota 4Runner applications, including the 2020 Toyota 4Runner OE radiator application.

Key Features

• Core height: 22.6400
• Core width: 26.5900
• Core thickness: 1.0600
• Transmission oil cooler included: Yes
• Inlet diameter: 1.3750
• Outlet diameter: 1.3600
• OE-focused radiator configuration for proper fitment and cooling performance

OE-Style Cooling Performance

Denso supplies radiators to original equipment vehicle manufacturers, and the 221-9279 reflects that OE engineering approach. The core dimensions, tank design, fin pitch, and materials are built to meet strict manufacturer standards for the Toyota 4Runner radiator application. This radiator is intended to maintain stable engine temperature and support dependable cooling performance under demanding driving conditions. If you are replacing a worn Toyota 4Runner radiator, Denso 221-9279 provides a direct-fit solution with a transmission oil cooler included.

This part cross-references Spectra Premium CU13251 and CSF 3698 for the same application.

What This Radiator Helps Address

• Overheating caused by a leaking or restricted radiator
• Coolant loss from cracked tanks or damaged core passages
• Transmission cooling concerns when the radiator cooler circuit is compromised
• Reduced heat transfer from age, corrosion, or internal blockage
• Fitment issues when replacing the factory Toyota 4Runner radiator

Installation Notes and Tips

Verify inlet and outlet hose diameters before installation: 1.3750 inches at the inlet and 1.3600 inches at the outlet. Confirm the radiator support, hose routing, and transmission cooler line connections match the vehicle before removal of the original unit. For 2010-2020 Toyota 4Runner radiator replacement, flush the cooling system, inspect hoses and clamps, and refill with the correct coolant specification after installation.

Quality Assurance

Denso radiators are built from OE experience and undergo durability and function testing before release. The 221-9279 is engineered to deliver reliable performance and fitment for Toyota 4Runner cooling system service.