The Genuine BMW Inner Left Window Channel Cover (part number 51337221177) is a high-quality replacement part for BMW vehicles. This cover is designed to fit the inner left side of the window channel, providing protection and support for the window as it is raised and lowered. Made from durable materials, this cover is built to last and withstand daily use. It is an authentic BMW product, ensuring a perfect fit and reliable performance. This inner left window channel cover is an essential component for maintaining the functionality and appearance of your BMW's windows.