The Bilstein B4 2002 BMW 745i Base Front Left Suspension Strut Assembly is a high-performance, monotube gas-pressure shock absorber designed to provide superior damping ability and improved handling. It features a self-adjusting, deflective disc valving system that is specifically engineered to provide superior performance for each individual application. This strut assembly is designed to provide superior comfort, stability, and control, while also reducing road noise and vibration. It is constructed from high-quality materials and is designed to last for years.