Description
Temporarily Out of Stock Estimated restock: August 25, 2026. You can order now to reserve yours; it ships as soon as it arrives.
Thermostat Assembly direct-fit replacement engineered to meet or exceed OE specifications.
Fits: Lexus GS300 06, GS350 07-11 13-15, GS450h 07-11 13-18, IS250 06-15, IS300 16-18, IS350 06-18, RC300 16-17, RC350 15-18
High-flow OE-style design for optimal engine cooling performance
Thermostat housing assembly is manufactured to factory housing dimensions for easy bolt-on installation and reliable hose connections
Includes temperature sensor where applicable
High-quality alloy or composite material is temperature-stable to resist warping or cracking that can lead to coolant leakage
Replaces OE #: 143-0879, 16031-31020, 34711, 49408, 660180, 86112, 902-5137, A70-99-0016, TH7147.82J, THT-004, TI 310 82, WH-TB-82
About Autotecnica
Auto Obsession is proud to offer products from Autotecnica. Autotecnica supplies high-quality aftermarket replacement parts for a wide range of Asian and North American cars and trucks braking, cooling, driveline, electrical, engine, fuel, HVAC, steering, and suspension. Manufactured to ISO/TS 16949 quality standards and built to meet OEM specifications, Autotecnica is a smart, cost-effective alternative to expensive Genuine components.
Warranty: 24 Month Unlimited Mileage Warranty. Guaranteed fitment.
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