Yes, you should get a wheel alignment after replacing ball joints. Ball joints are a key part of the front suspension and steering system. When they are removed, and new ones are installed, the position of the control arm and steering knuckle can change slightly. Even small changes can affect your alignment and cause the car to pull, the steering wheel to sit off-center, or the tires to wear unevenly. An alignment resets your vehicle’s steering angles back to the manufacturer’s specifications. Many shops consider wheel alignment essential after front suspension work, such as ball joints, tie rods, or control arms.