Driver side rear brake caliper screwed?

[A//// Guy]

The piston is frozen in place or does not return back into the cylinder. Ive had it happen 2 times to the same side in the rear. This can also happen because of the ebrake cable being stuck and pulling a little from not moving easily.

You can either replace the caliper with a rebuilt unit or rebuild it yourself.

You should notice a scraping sound while driving and the wheel will be super hot after driving around... Those are signs I ussually see/smell first.