The Bilstein B4 Series 22-172518 is a premium gas-pressure suspension strut designed to restore the original ride profile and handling of your BMW 3-Series. Built to meet or exceed OEM standards, it features twin-tube technology for consistent performance and durability. This specific unit is designed for the Front Left position. Component Details: 1x Suspension Strut Assembly (Manufacturer Part Number: 22-172518). Ideal for replacing worn factory struts to regain vehicle stability and comfort.