Genuine OEM Toyota Rear Brake Disc, part number 42431F4051. This is a single-piece rear brake disc designed for optimal braking performance. It is located on the rear axle assembly. This brake disc has a diameter of approximately 304mm and a height of 74.5mm, weighing 6.13kg. Genuine OEM brake discs are manufactured to precise tolerances to ensure consistent performance, heat dissipation, and longevity, preventing premature wear and ensuring safety.