The Bilstein B3 Series OE Replacement coil springs are designed to restore your vehicle's original ride height and handling characteristics. Manufactured to rigorous OE standards, these springs provide high durability and precise performance. This product is a high-quality aftermarket replacement for the rear axle of BMW X3 (E83) models. Component List: 1x Bilstein B3 Rear Coil Spring (Art: 38-228599). Please note: springs should always be replaced in pairs to ensure balanced suspension performance.