This VALEO thermostat (part code 820168) is designed to regulate the engine's operating temperature. It plays a crucial role in the cooling system by controlling the flow of coolant to the radiator. Proper functioning of the thermostat is essential for preventing engine overheating and maintaining fuel efficiency. A faulty thermostat can lead to either an engine running too cold or too hot, both of which can cause significant damage over time. VALEO is a trusted brand known for its quality automotive components. This thermostat is built to meet or exceed original equipment specifications, ensuring reliable performance and durability for your vehicle's cooling system.