Ball joints are crucial components in a vehicle's suspension system. They connect the steering knuckle to the control arms, allowing for smooth movement and flexibility. This design enables the wheels to pivot while maintaining stability, which is essential for safe driving. Over time, ball joints can wear out due to constant movement and exposure to dirt and moisture. When they deteriorate, it can lead to issues like uneven tire wear and poor handling. Regular inspections and maintenance are important to ensure that ball joints remain in good condition for optimal vehicle performance.