Brake pads and rotors wear out over time, how often the brakes should be replaced depends on two major reasons. The type of the brake material and the way you drive.
Pad Type: Softer brake pads perform better at lower speeds, they are great for vehicles in the cities because low speed braking produce lesser heat. Harder brake pads last longer and they are harder on the rotors.
Driving Habits: If you are a driver who stop abruptly most of the time, most likely the pads will not last very long. Hard breaking not only cause premature wear on the pads but also increase the chances to warp the disc rotors causing vibrations.
Routes: Stop and go traffic and traffic lights in the cities make your brakes work much harder. If you cruise a lot on the highway, you obviously have less worries about replacing the rotors and pads all the time.
On average, brake pads need to be replaced anywhere between 60,000 to 80,000 KM. If you are a hard-braker, you will probably need to do it every 35,000 KM. Whatever driver type you are, we highly recommend a brake inspection at least once a year. Good and functional brakes are the key to safety.