Genuine OEM Audi Fixed Caliper, part number 420615107C. This caliper is a critical part of the braking system, housing the brake pads and applying hydraulic pressure to them. It is mounted to the suspension knuckle and works in conjunction with the brake rotor. The caliper is constructed from durable metal to withstand high temperatures and forces. Genuine OEM calipers ensure precise fitment and optimal braking performance, maintaining the vehicle's original safety standards.