Brake pads are the removable surfaces that callipers use to make contact with the rotors during this process. These pads won't last forever. (No car part does.) The friction mentioned earlier will inevitably wear them down over time. Let the pads get too thin, and your brakes won't work as effectively as they should, the front two wheels have a braking apparatus that depend on what is known as rotors: metallic discs found behind each wheel. Above each of these is a clamp-like device called the calliper. When you hit your brake pedal, the callipers start to close, squeezing the rotors from both sides. This action produces friction, which causes the wheels to spin more slowly until they come to a complete stop.
Indicator Light Turns On:
a sign that it's time to replace your brake pads is when the indicator light turns on. In some models of cars, there is a sensor on the brake pad that will trigger when the brake pads become worn down. If your brake light turns on, you need to get a professional to take a look at your brake pads and make a recommendation on how soon to replace them
You're out driving with the radio off and the windows rolled up. In the relative quiet, you hear a faint scraping, squealing, or buzzing sound. brake pads are manufactured with built-in "wear indicators." The sole purpose behind these things is to emit that unpleasant screech you just heard. Wear indicators are metal tabs located near the top of typical brake pads. When the pad itself wears down to a dangerous extent, the indicator will scrape against the rotor.
Vibrating Brake Pedal:
That means time to replace your brake pads is a vibrating brake pedal. If it is challenging to stop your car with your current brake pedal and it vibrates or feels unsteady as you press down, this means that your brake pads have worn out. A vibrating brake pedal is not normal and in order to avoid any further damage to your car or a potential accident, it's important to have your car checked right away.
the brake pads fit snugly a special holding device. Other vehicles keep them steady with clips, bolts, or pins. At all rates, the common goal behind these designs is to keep the pads from wobbling around. If they become loosened somehow (perhaps after a part of the surrounding hardware gets damaged), they'll begin to rattle.