Genuine OEM Audi Rear Left Brake Caliper, part number 420615407K. This critical braking component is responsible for applying hydraulic pressure to the brake pads, pressing them against the rotor to slow or stop the vehicle. It is specifically designed for the rear left wheel position. Weighing approximately 1.98 kg, this caliper is engineered for precise operation and durability. Choosing a genuine OEM brake caliper ensures correct piston bore diameter, proper sealing, and robust construction for reliable and consistent braking performance.