Denso 221-3142 Radiator

Denso Radiator for Prius Cooling Performance

The Denso 221-3142 radiator is an OE-style replacement built for 2004-2009 Toyota Prius applications. It follows Denso’s original-equipment engineering approach, with core dimensions and materials selected to match factory fitment and cooling requirements.

For Toyota Prius owners searching for a radiator replacement by part number, Denso 221-3142 offers a direct-fit solution for maintaining stable engine temperature and dependable cooling system operation.

Key Features

• Fits 2004-2009 Toyota Prius
• Core height: 23.6250 in.
• Core width: 13.7500 in.
• Core thickness: 0.6250 in.
• Inlet diameter: 1.2500 in.
• Outlet diameter: 1.2500 in.
• No transmission oil cooler included
• Denso part number 221-3142

Detailed Description

Denso 221-3142 is a radiator engineered for the Toyota Prius cooling system, with OE-based configuration details that support proper fitment and heat transfer. Denso supplies radiators to vehicle manufacturers worldwide, and this replacement follows the same focus on dimensional accuracy, fin pitch, tank design, and core construction used in factory applications. The result is a radiator intended to match the original layout for 2004-2009 Toyota Prius models while supporting consistent coolant flow and engine temperature control.

This part cross-references Spectra Premium CU2758 for the same application.

What It Helps Address

• Overheating caused by a leaking or restricted radiator
• Coolant loss from cracked tanks or damaged core passages
• Reduced heat dissipation from clogged or corroded radiator fins
• Temperature instability in a high-mileage Toyota Prius cooling system
• Fitment issues when replacing the original Prius radiator with an OE-style unit

Installation Notes and Tips

Verify inlet and outlet hose sizes before installation, and confirm the vehicle is a 2004-2009 Toyota Prius. Inspect hoses, clamps, and coolant condition during replacement, and flush the cooling system if contamination or corrosion is present. Because this radiator does not include a transmission oil cooler, confirm your vehicle’s original configuration before ordering.

Quality Assurance

Denso radiators are built to OE standards and undergo durability and function testing before release. Denso’s manufacturing approach emphasizes fitment accuracy and reliable cooling performance for daily driving and demanding operating conditions.