Yes the rotor needs to be resurfaced so it is flat and clean and the new brake pad can seat and properly dissipate heat. This will bring the braking power back up to spec. and keep you and your family safe on the road. Another important factor is the thickness of the rotor there is a min. thickness if the rotor is to thin it won’t dissipate the heat like it should and braking power will be diminished. That’s why you can get in trouble with discount brake jobs many times the proper steps to brake replacement will be skipped, and that leaves you with unsafe brakes.
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