The Bilstein B3 OE Replacement 04-10 BMW X3 Front Coil Spring is a high-quality aftermarket replacement part designed to match the performance and reliability of the original factory coil spring. This product is made from high-strength steel and features a corrosion-resistant coating for long-lasting durability. It is designed to provide a comfortable ride and improved handling while maintaining the OEM ride height. It is an ideal replacement for worn or damaged factory coil springs and is suitable for use with most aftermarket suspension components.