The brake problem cannot be ignored. Brakes can ensure the safety of cars, and many traffic accidents are caused by brake failure every year. If you don't pay attention to the brakes on a daily basis, it may threaten the safety of the people in the car at a critical moment. Generally, there will be some precursors before the brake failure, and timely detection and maintenance can avoid accidents.
1. The vehicle shakes when braking.
In daily driving, once the shaking phenomenon occurs in the process of braking, then it is necessary to be vigilant. One situation is that the brake disc is too long or the mileage is too long, causing the brake disc to be worn to the limit, which generally appears in older cars. In another case, when a sharp brake disc is used, there is a problem with the dynamic balance, and there will be shaking when the brakes are pressed. After the above two situations occur, the first time to go to the auto repair shop for maintenance, replacing the brake pads of the regular manufacturer can solve this crisis. 
2. The brakes become hard or soft.
If you find that the pedal is more difficult than usual when you step on the brakes in normal driving, it is particularly hard and you can't step on it, this situation is basically a problem with the booster system of the brakes, and you must go to the repair shop in time for inspection and maintenance, otherwise it is really easy to have an accident.
There is also the opposite situation, which is that the brakes become softer. When you step on the brakes, you feel that the pedal is weak, this situation is caused by insufficient oil pressure in the brake system, it may be that the brake fluid is leaking, or it may be mixed with air.
3. The braking strength decreases.
If you feel that the brakes are not as strong as before when you apply the brakes, you should be careful at this time. There are many scenarios that can cause this problem.
First of all, check the brake pads. The brake pad is a very weary part, and after a certain number of kilometers of use, the brake pad will wear out to the limit position, and it should be replaced at this time.
Then when the brake pads are worn out more than half, you can obviously feel that the braking strength is not enough when you step on the brakes, if you don't replace it in time, the brake warning light of the dashboard will light up in the later stage, and it will really have to be replaced at this time. Otherwise, accidents can happen at any time.
Second, check the brake discs. Brake discs, like brake pads, are also wear parts, and brakes are made to stop the car by relying on the resistance generated by friction between the brake pads and the brake disc. The brake disc will also become thinner after a long period of use, at which time the brakes will become softer and the stroke will be longer. So every time you change the brake pads, check the brake discs by the way.
At present, there is also a maintenance method on the market, which is to put the used brake disc on the machine and grind it before continuing to use it. Jing Xiaoyuan does not recommend everyone to do this, because the brake disc also has a lot of technical parameters, and the strength and dynamic balance of the brake disc after secondary processing will decline, which is also a big hidden danger in daily driving. So please just replace the brake disc with a new one.
Finally, check the brake fluid. Brake fluid is very absorbent, after a period of use, there will be a part of the loss, check whether the brake oil in the brake oil pot is in the normal scale position, if not, please add brake fluid in time. In addition, if the brake fluid is lost very quickly, you need to check whether the brake pump is leaking, you only need to check whether there is oil seeping inside the wheel one by one, if so, you need to replace the brake pump.
Fourth, the vehicle deviates when braking.
This phenomenon occurs due to the imbalance of braking forces on both sides of the vehicle. That is, in the process of braking, one side of the tire has stopped, and the other side of the tire has not stopped, then the vehicle will deviate. In this case, there should be a problem with the brake cylinder.
Jing Xiaoyuan reminds everyone that in the daily maintenance must not ignore the brake system, because once it fails, it will cause a major accident.