Is the caliper-anchor housing spring needed on 03 expedition?

The caliper-anchor housing spring is not generally needed on the 2003 Ford Expedition unless you're experiencing specific issues with the caliper alignment or the brake system. This spring helps to keep the caliper in the correct position and can be beneficial for proper brake function. However, if the brakes are functioning well without it, it may not be necessary. Always consult a repair manual or a professional mechanic for specific guidance related to your vehicle's condition.