Bilstein B3 OE Replacement (Air) suspension air bags are designed to replace the original suspension air bags on select European brand vehicles. Bilstein is an OE supplier for air suspension systems; the quality of these products meets, and typically exceeds, the standards set forth by the vehicle's manufacturer. Each B3 OE Replacement (Air) suspension air bag is designed to connect directly into the original connectors on the vehicle, ensuring modification-free installation and restoration of the original feel of the vehicle.