The Meyle Expansion Tank cap - 1001210042 is a replacement part for a vehicle's expansion tank. It is designed to securely seal the tank, preventing any leaks or loss of coolant. This cap is made by the brand Meyle, known for producing high-quality automotive parts. It is compatible with various makes and models of vehicles, providing a reliable and durable solution for maintaining proper coolant levels. This product is made with precision and meets strict quality standards, ensuring optimal performance and longevity.