The Bilstein 07-13 BMW 328i B3 OE Replacement Coil Spring - Front is a direct replacement for the original equipment coil spring of the BMW 328i from 2007 to 2013. This coil spring is designed to restore the original handling characteristics of the vehicle. It is a high-quality, long-lasting part made from a special steel alloy and is corrosion-resistant. The spring is designed to provide a comfortable, smooth ride with improved control and stability. It also helps to reduce body roll and sway.