The Bilstein B4 2005 BMW 120i Base Front Left Suspension Strut Assembly is a high-quality suspension strut designed for the 2005 BMW 120i Base model. It is constructed from durable materials and features a monotube design for superior performance and handling. The strut is designed to reduce body roll, improve steering response, and provide a smoother ride. It also includes a dust boot to protect the strut from road debris and a protective coating to reduce corrosion.