Yes, this could be result of a failing caliper piston or one of the pads getting stuck in a position where it is in constant contact with the rotor. Leaving your parking brake on while driving would also cause significant heat to radiate from the rear brakes after normal driving. However, this generally wouldn't only affect one side. Lastly, removing the caliper and inspecting it should give you insight into exactly what the issue is.
Jun 13th, 2013
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