This Bilstein B6 11-17 BMW X3 / 15-17 BMW X4 Front Left Monotube Strut Assembly is an OE replacement part designed to provide superior ride comfort and stability. This strut assembly is made from high-quality materials and features a monotube design, which is more resistant to wear and tear. The assembly also includes a dust boot, bearing plate, and all necessary mounting hardware for a hassle-free installation. This strut assembly is designed to provide improved handling and stability while providing a comfortable ride.