The Meyle Engine Coolant Expansion Tank Cap - 3142380003 is a replacement cap for the expansion tank of a vehicle's engine coolant system. It is designed to securely seal the expansion tank and maintain the proper pressure within the system. This cap is made by Meyle, a trusted brand in the automotive industry known for producing high-quality replacement parts. It is compatible with various makes and models of vehicles and is made from durable materials to ensure long-lasting performance. This cap is an essential component of the engine coolant system and helps to prevent leaks and maintain the proper functioning of the vehicle's cooling system.