The Bilstein B4 2002 BMW 745i Base Rear Shock Absorber is a high-performance suspension component designed to provide superior ride comfort and handling. This shock absorber is specifically engineered to meet the specific needs of the BMW 745i and is constructed with a monotube design for maximum durability and performance. It features a gas-pressure construction for a comfortable ride, and its zinc-plated finish provides superior corrosion resistance. This shock absorber is designed to provide superior road holding and control, and is backed by Bilstein's limited lifetime warranty.