Denso 221-3171 Radiator

Overview of the Denso Radiator 221-3171 for Lexus GS Models

The Denso radiator part number 221-3171 is designed specifically for Lexus GS300, GS350, and GS450h models. This radiator ensures efficient engine cooling with precise core dimensions and inlet/outlet sizes tailored for these vehicles.

• Core Height: 15.812 inches
• Core Width: 27.75 inches
• Core Thickness: 0.625 inches
• Inlet Diameter: 1.5 inches
• Outlet Diameter: 1.562 inches
• Transmission Oil Cooler: Not included

Detailed Radiator Specifications and Design

The Denso 221-3171 radiator features a core height of 15.812 inches and a width of 27.75 inches, providing ample surface area for heat dissipation. Its core thickness of 0.625 inches balances cooling efficiency with compact design, suitable for the engine bay of Lexus GS300, GS350, and GS450h models. The inlet and outlet diameters of 1.5 inches and 1.562 inches respectively ensure proper coolant flow and compatibility with factory hoses. This radiator does not include a transmission oil cooler, focusing solely on engine cooling performance.

Applications and Common Issues Addressed

• Replacement for leaking or cracked radiator in Lexus GS300, GS350, and GS450h
• Resolves engine overheating caused by inefficient cooling
• Addresses coolant loss due to damaged radiator cores or tanks
• Improves cooling system reliability after radiator corrosion or clogging
• Suitable for restoring factory cooling performance in Lexus GS models

Installation Notes and Tips

When installing the Denso radiator 221-3171, ensure all coolant hoses match the specified inlet and outlet diameters for a secure fit. Drain the existing coolant completely before removal to avoid spills. Inspect and replace any worn hose clamps or seals to prevent leaks. Bleed the cooling system properly after installation to remove air pockets and maintain optimal coolant circulation. Professional installation is recommended for precise fitment and system integrity.

Quality Assurance and Warranty Information

Denso radiators are manufactured to meet OEM specifications for Lexus GS300, GS350, and GS450h vehicles. The 221-3171 radiator undergoes rigorous quality control to ensure durability and performance. While specific warranty details may vary, Denso products typically include a limited warranty covering defects in materials and workmanship. Refer to the product documentation for exact warranty terms.