I’m curious if this has been an ongoing issue for anyone else? 3 months ago I noticed metal on metal sound from my rear left. I didn’t hear the squealing to give me a heads up to change pads and seemed to happen suddenly. Had pads and rotors replaced hey mentioned the calipers may and the mechanic said the caliper may have been getting “stuck” but shouldn’t be an issue now and he did not change it. 3 months later, I’m in the same situation! I’ve seen threads about asking sure a piston is not stuck and checking for over greasing. Any additional thoughts for permanent fix? I know have access at home to lift the car and work on it myself.