Koyorad A2305 Radiator

Koyorad A2305 Radiator Overview

The Koyorad A2305 radiator is an OE-equivalent replacement built for direct cooling-system service on select Scion and Toyota applications. It combines an aluminum core with plastic tanks and includes an internal transmission oil cooler for vehicles equipped with automatic transmission cooling.

Compatible with 2000-2005 Toyota Echo, 2004-2006 Scion xA, and 2004-2006 Scion xB, this radiator is built around the factory-style dimensions and hose connections needed for a straightforward replacement. The Koyorad A2305 is a practical choice when you need a radiator that matches the original layout and cooling function.

Key Features

• OE-equivalent radiator replacement from Koyorad
• Aluminum core with plastic tanks
• Single-row core design
• Core dimensions: 13.75 in. height, 20.1875 in. width, 0.625 in. thickness
• 1.25 in. inlet and 1.25 in. outlet diameters
• Internal transmission oil cooler included
• Transmission oil cooler diameter: 0.75 in.
• Part number: A2305

Detailed Description

Koyorad builds the A2305 as an OE-style radiator replacement for compact Toyota and Scion cooling systems. The aluminum core supports efficient heat transfer, while the plastic tank construction follows the factory-style radiator layout used in the original application. With the internal transmission oil cooler included, this radiator serves vehicles that route automatic transmission fluid through the radiator assembly for temperature control.

This part number, A2305, is a direct-fit cooling component for 2000-2005 Toyota Echo and 2004-2006 Scion xA and Scion xB models. If you are searching for a radiator for a 2004-2006 Scion xB, a 2004-2006 Scion xA radiator, or a 2000-2005 Toyota Echo radiator replacement, this unit matches the listed fitment and factory-style connection sizes.

Common Problems This Radiator Addresses

• Coolant leaks from a cracked or aging radiator tank
• Overheating caused by reduced heat dissipation
• Transmission fluid temperature issues related to a failing internal cooler
• Corrosion or wear in the original radiator core
• Replacement needs after impact damage or long-term fatigue

Installation Notes and Tips

Verify inlet and outlet hose diameters, core dimensions, and transmission cooler line routing before installation. Drain the cooling system fully, inspect hoses and clamps for wear, and transfer any required factory fittings or sensors from the original radiator if your vehicle uses them. After installation, refill with the correct coolant mixture and bleed the system according to the vehicle service procedure.

Fitment includes 2000-2005 Toyota Echo, 2004-2006 Scion xA, and 2004-2006 Scion xB. Confirm automatic transmission cooler line compatibility before ordering if your vehicle is equipped with transmission cooling through the radiator.

Quality Assurance

Koyorad states that its radiators are manufactured as OE-equivalent replacements using the technical experience needed to complete the job correctly the first time. The A2305 follows that OE-style replacement approach for consistent fitment and cooling-system service.