Koyorad A13334 Radiator

Koyorad A13334 Radiator Overview

The Koyorad A13334 radiator is an OE-equivalent replacement built for select Lexus GS applications. It combines an aluminum core with plastic tanks and includes an internal transmission oil cooler for direct-fit cooling system service. This radiator is a fitment-based solution for 2006-2011 Lexus GS300, GS350, and GS450h models.

Key Features

• OE-equivalent radiator replacement from Koyorad
• Aluminum core with plastic tank construction
• Single-row core design
• Core dimensions: 15.75 in. height, 28.875 in. width, 0.625 in. thickness
• 1.5 in. inlet and 1.5 in. outlet diameters
• Internal transmission oil cooler included
• Transmission oil cooler diameter: 1.125 in.
• Fits 2006-2011 Lexus GS300, GS350, and GS450h applications

Detailed Description

Koyorad A13334 is engineered as a direct replacement radiator for Lexus GS sedan and hybrid applications. The aluminum core supports efficient heat transfer, while the plastic tank design follows common OE construction for service replacement. With integrated transmission oil cooler passages, this radiator addresses both engine cooling and automatic transmission fluid heat management in one assembly. For shoppers searching for a 2006-2011 Lexus GS300 radiator, 2007-2011 Lexus GS350 radiator, or 2007-2011 Lexus GS450h radiator, this part number provides a fitment-specific option. The part number A13334 is also useful when cross-checking catalog listings for the same application.

What It Helps Address

• Overheating caused by a worn or leaking radiator
• Coolant loss from cracked tanks or aged core materials
• Transmission fluid temperature issues related to a failing internal cooler
• Reduced cooling efficiency from clogged or corroded radiator passages
• Service replacement needs on Lexus GS300, GS350, and GS450h models

Installation Notes and Tips

Verify inlet and outlet hose diameters, mounting points, and transmission cooler line connections before installation. Drain coolant fully, inspect hoses and clamps, and flush the cooling system if contamination is present. After installation, refill with the correct coolant specification, bleed air from the system, and check for leaks at the radiator, hose connections, and transmission cooler fittings. Confirm fitment by matching the vehicle year and model to the listed applications for A13334.

Quality Assurance

Koyorad manufactures OE-equivalent radiators using application-specific engineering and replacement-focused construction. This part cross-references a limited number of catalog references for the same application, including Denso 221-3140 and Spectra Premium CU2948.