The Bilstein 5100 Series 2012 BMW Z4 sDrive35i Front Left Suspension Strut Assembly is designed to replace the factory strut in your BMW Z4 sDrive35i. This strut assembly features a monotube design, allowing for improved ride comfort and handling. The strut is also adjustable, allowing you to customize the ride height and stiffness to your preferences. This strut assembly is made with high-quality materials and is tested to ensure a long service life.