Firmly press the handbrake, then put up the front of the car and hold it firmly on the axle stands and then remove the front roadwheels. To fully check, fit and clean the brake pads, and it can be checked whether the operation of the caliper and the state of the brake disc can be comprehensively observed on both sides. To check that quickly put the thickness of each brake pad through the aperture in the caliper body. When the friction material on one pad becomes worn to the stipulated thickness or less, then the entire set of pads should be replaced.