Genuine OEM Audi Rear Brake Disc, part number 4F0615601E. This component forms the critical friction surface for the rear brake pads, converting kinetic energy into heat to slow and stop the vehicle. Weighing 5.5 kg, genuine OEM brake discs are manufactured to precise metallurgical specifications and tolerances, ensuring optimal heat dissipation, consistent braking performance, and vibration-free service life.