If you begin to hear a grinding sound while the brake pedal is pressed driving down the road, schedule an appointment with us ASAP! The most likely cause of this noise is the brake pad friction material being worn down to the metal backing plate. Or in other words, the brake pad is basically useless. The grinding noise is the sound of the metal backing plate being pressed against the rotor. In most cases, the brake rotor will need replaced along with the brake pads due to gouges from metal being pressed on metal. The stopping ability of your vehicle is severely compromised when brakes become “metal to metal”, and should be addressed immediately.