Brake problem
 

Just had my rear caliper changed as it was sticking. Car now pulls a lot better but there's still this strange metal scraping noise coming from the back. Usually happens when you lift off the brake pedal. Any ideas?

Did you have new pads ?

They were replaced last year at the MOT and the garage said they are still fine.

Dust shield scraping perhaps.

I had same problem on mine and it turned out to be some rust from the back plate had dropped down and was trapped between disc and caliper/pads, while I was sorting it out I noticed there was a rust lip on the edge of the disc try clearing that away aswell to stop any rust dropping behind again I found the best way was to put a flat blade screwdriver against top of the caliper apply some pressure and turn the disc watch your eyes though I got abit of rust in mine not nice trying to get it out.