Denso 221-3109 Radiator

Denso 221-3109 Radiator for Toyota and Lexus

The Denso 221-3109 radiator is built for select Toyota and Lexus applications that need dependable engine cooling and stable transmission fluid temperature control. It is a direct-fit radiator for 1994-1996 Lexus ES300 and 1994-1996 Toyota Camry, plus 1995-1999 Toyota Avalon.

Key Features

• Core height: 16.7500 in.
• Core width: 28.0620 in.
• Core thickness: 1.0000 in.
• Inlet diameter: 0.9370 in.
• Outlet diameter: 0.9370 in.
• Transmission oil cooler included for integrated cooling support
• OE-style fitment and construction based on Denso radiator engineering

Detailed Description

Denso part number 221-3109 is a radiator engineered to meet OE-level standards for fit, function, and durability. Denso supplies radiators to vehicle manufacturers worldwide, and this unit reflects that OE experience through its core dimensions, tank design, fin pitch, and materials selection. For drivers servicing a Toyota Avalon, Toyota Camry, or Lexus ES300, this radiator provides the cooling capacity needed to help maintain proper engine temperature under everyday driving and demanding conditions.

This radiator includes a transmission oil cooler, making it a practical replacement where the factory cooling system routes transmission fluid through the radiator. The 221-3109 is a strong match for long-tail searches such as 1995-1999 Toyota Avalon radiator replacement, 1994-1996 Toyota Camry radiator with transmission cooler, and 1994-1996 Lexus ES300 cooling system replacement. This part cross-references Spectra Premium CU1746 and Toyota 16400-0A010 for the same application.

What It Helps Address

• Engine overheating caused by a worn or restricted radiator
• Coolant leaks from aging tanks, seams, or core damage
• Transmission fluid temperature rise in vehicles using an integrated cooler
• Reduced cooling efficiency from clogged or corroded radiator passages
• Fitment issues when replacing an OE-style radiator on Toyota and Lexus sedans

Installation Notes and Tips

Verify inlet and outlet hose size before installation, and confirm the radiator matches the vehicle’s factory transmission cooler routing. Inspect hoses, clamps, and coolant condition during replacement to help avoid repeat cooling-system issues. For best results, flush the system if contamination or corrosion is present before installing the new radiator.

Quality Assurance

Denso radiators are built to strict durability and function standards and are tested before release to support reliable performance. The 221-3109 is designed around OE specifications for the listed Toyota Avalon, Toyota Camry, and Lexus ES300 applications.