Genuine OEM Volkswagen Brake Disc, part number 2N0615301E. This disc provides a surface for the brake pads to grip, slowing down the vehicle when the brakes are applied. It is located at position 11 in the diagram. This brake disc is made from high-quality cast iron for optimal heat dissipation and durability. Genuine OEM brake discs are manufactured to exact tolerances for proper balance and smooth braking performance.