I'm the OP, having never owned or worked on a car with a electric parking brake, I was told I wouldn't be able to push in the piston to make room for the thickness of the new brake pads without a scan tool. Having never taken apart or seeing this type of brake system, it seems this electric brake is attached to the caliper, pushes in the pad, and is removable? And if removed, then the piston can be pushed back out? With only 2,000 miles on the vehicle, and being the rear brakes, it will be a long time before I will need rear brake servicing. At that time, I will take the rear wheel off, or at a wheel rotation, I will investigate and learn if the motor can be removed easily and will result in pushing the piston back? As mentioned, at that time, scan tools will be cheaper, better, improved.