The Genuine Porsche Engine Coolant Hose Flange Retaining Spring (part number 99902101101) is a small but essential component of the engine cooling system in Porsche vehicles. This spring is designed to securely hold the coolant hose flange in place, preventing leaks and ensuring proper coolant flow. It is made from high-quality materials to ensure durability and reliability. This product is a genuine OEM part, meaning it is manufactured by Porsche and specifically designed for use in their vehicles. It is a crucial component for maintaining the proper functioning of the engine cooling system and should be replaced if damaged or worn out.