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Kia Optima Thermostats and Housings
This page brings together thermostats and housings for the Kia Optima across model years 2001–2020, including engine coolant thermostats, thermostat housings, and water outlets available as OE replacement parts, gaskets, and kits. Pick your Kia Optima's year above to narrow the list to thermostats and housings with confirmed fitment. Every part shown is checked against our vehicle data.
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In Stock (10+)
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In Stock (10+)
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In Stock (10+)
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In Stock (10+)
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In Stock (10+)
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4 left at this price
In Stock (7)
Representative Photo, actual item may vary
Aisin Automotive Casting Tennessee THYK-802 Engine Coolant Thermostat Assembly
Part: THYK-802
$12.42
In Stock (5)
Representative Photo, actual item may vary
In Stock (8)
Representative Photo, actual item may vary
Aisin Automotive Casting Tennessee THYK-803 Engine Coolant Thermostat Assembly
Part: THYK-803
$11.38
In Stock (8)
What's here for your Kia Optima
- Engine Coolant Thermostats — OE replacement units and kits
- Engine Coolant Thermostat Housings — direct-fit housings with gaskets
- Engine Coolant Water Outlets — replacement outlets and related hardware
The widest selection here comes from Motorad, Dorman, Beck/Arnley, and Gates, covering a broad span of Kia Optima model years and configurations. Other categories Kia Optima owners shop for: Kia Optima Brake Rotors and Drums, Kia Optima Shocks and Struts and Kia Optima Springs and Suspension Parts, or browse all Kia Optima parts and accessories.