I only notice it when sitting still or backing out of my driveway, but when I apply the brake pedal, there is a relatively loud metallic clicking noise that comes from the rear brakes. I can't tell if it's only on one side or both, but I'm hoping that it's nothing serious (wife drives the car back and forth to work every day). Maybe a loose caliper or something? Maybe just noisy linings? Any thoughts or technical advice would be much appreciated. 199 Contour SE Sport V6 MTX.