-03 KYB Shocks & Struts Strut Boots are designed to provide superior protection for your BMW 325xi, 330xi, and 525 Series vehicles from 2001-2005. These strut boots are designed to keep dirt, dust, and other debris away from the strut shaft, which can help prevent premature wear and failure of the strut. The boots also help to reduce noise and vibration from the strut for a smoother ride. They are made from high-quality materials and are designed to last for the life of your vehicle.