Genuine OEM Kia Thermostat Gasket, part number 256422GGA0. This essential gasket forms a critical seal between the thermostat housing and the engine, preventing coolant leaks and ensuring the integrity of the engine's cooling system. It is designed to withstand the high temperatures and pressures of the cooling system. Typically made from durable rubber or a composite material, this gasket provides a reliable, long-lasting seal. Using a genuine OEM gasket ensures precise fitment and material quality, which is crucial for maintaining proper coolant circulation and preventing engine overheating.