The next step is the replacement cycle of the brake fluid; normally, the brake fluid should be replaced if the vehicle travels 40,000 kilometers or the brake fluid has been used continuously for two years. Why is the brake fluid replaced according to the above standards? That is because the brake fluid itself is hydrophilic. The water content in the brake fluid will increase after long-term use, which will reduce the boiling point of the brake fluid, and the brake fluid will reach the boiling point more easily. , Resulting in air bubbles causing brake failure. Moreover, the brake fluid used for a long time contains more impurities, which will reduce the brake performance and even damage the brake system. Generally speaking, the replacement of brake fluid is also a symptom. If you find that the force of the brake is light or heavy, you may need to change the brake fluid.