The Bilstein B6 2013 BMW X1 sDrive28i Front Left Suspension Strut Assembly is a direct replacement part for the OEM strut assembly on the BMW X1 sDrive28i. This strut assembly is designed to increase the performance and handling of the vehicle, while providing superior ride comfort. It features a monotube design with a gas-pressure construction, which allows for improved responsiveness and maximum damping performance. The strut is designed to work with the factory spring and mounts, and is backed by a limited lifetime warranty.