The Genuine BMW Cap Wiper Arm Left - 61618161491 is a replacement part for the wiper arm on the left side of a BMW vehicle. This cap is designed to fit securely onto the end of the wiper arm and protect the internal components from dirt, debris, and moisture. It is a genuine BMW product, ensuring high quality and compatibility with the vehicle. This cap is made from durable materials and is an essential component for maintaining the proper functioning of the wiper system.