A steering knuckle is a crucial component in a vehicle's suspension system. It connects the wheel hub to the suspension and allows for the steering mechanism to pivot. This part plays a vital role in maintaining the alignment of the wheels and ensuring smooth steering. Typically made from cast iron or aluminum, the steering knuckle houses the wheel bearings and provides a mounting point for the brake caliper and suspension components. Proper functioning of the steering knuckle is essential for vehicle stability and handling, making it an important part of the overall automotive design.