The Bilstein B4 2013 BMW X1 sDrive28i Front Left Suspension Strut Assembly is a direct replacement part for the BMW X1 sDrive28i model. This strut assembly is designed to provide improved ride comfort and handling, as well as increased durability and longevity. It is constructed from high-quality components, including a monotube gas pressure shock absorber, a dust cover, and a heavy-duty steel strut body. Additionally, this strut assembly features an adjustable pre-load spring rate, allowing for a more customized suspension setup.