The Genuine Porsche Engine Coolant Thermostat Housing Cover (part number 9A110612100) is a component of the engine cooling system in Porsche vehicles. It is a housing cover that fits over the thermostat, which regulates the flow of coolant through the engine to maintain optimal operating temperature. This cover is made from high-quality materials and is designed to fit perfectly in Porsche engines for reliable performance. It is an essential part for ensuring the proper functioning of the engine cooling system, which is crucial for the overall health and longevity of the vehicle.