Tune up A world to learn
Each wheel of your car is equipped with two of these brake pads that close together when you press on the brake pedal. Naturally, these pads wear down over time. That metal scraping sound that you one day start hearing whenever you press on the brakes is your car telling you that brake repair is needed. You could choose to ignore the sound, but the pads will wear completely away and only metal against metal will be left to stop your car. The scraping and grinding of metal on metal will eventually completely ruin the wheel mechanism.