Radiator for Lexus GS (2007-2011) 3.5L

Heavy-Duty All-Aluminum Radiator for 2007-2011 Lexus GS

What it Does: The all-aluminum radiator replaces the fragile plastic-tank heat exchanger on the 2007-2011 Lexus GS to prevent catastrophic coolant loss and maintain stable engine operating temperatures.

The Stock Lexus GS Radiator Failure Points

Factory cooling systems in the S190 chassis rely on an OEM radiator constructed with crimped composite plastic end tanks sealed to an aluminum core via rubber O-ring gaskets. Over repeated heat cycles and elevated operational pressures from the high-compression (11.8:1) 2GR-FSE 3.5L V6, this plastic degrades, oxidizes, and becomes brittle. The most common mechanical failure points are hairline stress fractures across the upper tank neck and separation along the crimped seam header, leading to rapid coolant depressurization and severe thermal damage to the cylinder heads.

The Engineering Solution

This direct replacement performance radiator replaces brittle plastic with 100% TIG-welded, structural-grade aluminum end tanks mated to a brazed multi-louvered tube-and-fin aluminum core. Eliminating mechanical crimp seams and elastomeric seals removes the primary point of failure under cyclic heat soak. The reinforced core geometry maximizes heat rejection efficiency and fluid transfer rates across the radiator face. CNC-machined inlet and outlet ports match original hose routing, and factory-located mounting tabs secure directly to the OEM fan shroud without requiring custom brackets. Designed to supersede OEM part number 16400-31370.

Technical Specifications

Compatibility

• 2007-2011 Lexus GS 350 3.5L V6 (RWD / AWD)

Frequently Asked Questions

Does this fit the S190 GS?
Yes, this is a direct fit for the 2007-2011 Lexus GS equipped with the 2GR-FSE engine.

Does this unit feature integrated transmission cooling provisions?
Yes, it includes internal transmission cooler fittings that match the factory hardline routing for seamless drop-in installation.

The Lexus Engineering Caliber

Engineered to preserve the strict mechanical tolerances and smooth high-RPM thermal demands of the direct-injected JDM V6 platform without risk of split tank failure.