When did the car first change its brake pads?

The brake pad is generally composed of a metal back plate, an adhesive thermal insulation layer and friction materials, with a thickness of about 1.5cm. The friction materials on the surface of the used brake pad will gradually be consumed with the braking frequency. As we wear the same pair of shoes for a long time, the rubber materials on the sole will wear thin over time. The same principle applies to the brake pad. When the friction materials are completely worn, they will directly rub with the metal back plate, There is not too much friction between smooth metal and metal, which will not only cause the car to brake, but also directly damage the brake disc. Therefore, in order to prevent serious wear and accidents, the manufacturer will set an alarm for the brake pads!
Traditional brake pads all have a thickness warning small iron plate, which roughly means that when the brake pad is worn to a certain extent, the small iron plate will contact the brake disc, and the metal to metal wear will make a harsh sound, which indicates that the brake pad has reached its limit life. At this time, it is necessary to replace the brake pad immediately. If you continue to use it, it may cause brake failure. If you can see the thickness through the wheel hub, friends, It can be replaced according to the specific conditions of the vehicle and the degree of wear.
The other one is different from the traditional mechanical warning. The sensor sensing line is used to judge the wear degree of the brake pads. It does not emit a harsh sound, but is directly displayed on the instrument. Under normal conditions, the sensor always keeps the path, and the instrument does not generate an alarm prompt. Only when the brake pads are worn to the point where the sensing line is broken, then the sensor is disconnected, and the instrument starts to alarm to prompt for replacement as soon as possible, This warning limiter is intuitive and convenient to display!
Theoretically, after the brake pads wear to the alarm position, they can still drive about 500 km. However, considering the different road conditions and driving habits, it is recommended that you should go to the repair shop to replace them as soon as you call the police. It is worth noting that you should also pay attention to inspection and maintenance at ordinary times, especially for long distance driving. If the brake pads are thin or have already called the police, it is particularly dangerous to drive on high speed.
There is no exact time to replace the brake pads. The driving mileage is only a reference value. It can't judge the extent of wear of the brake pads. Maybe the brake pads can travel another 100000 km after 30000 km, or the brake pads can reach the alarm position after 30000 km. Therefore, it is most accurate to replace the brake pads according to the actual wear. Learn to judge, and replace according to the condition of your own car, so it is not easy to step on the pit.