Hello everyone, I'm Xiao Li. After using the car for 12 years, I realized that the brake fluid cannot be changed casually, let alone added casually. When many people go to the maintenance shop, they see the 4S shop and say that they have driven so many kilometers and want to change the brake fluid, so they will change it. Or when you check the car, you find that the oil level of the brake fluid is too low, and no matter what the reason is that the oil level is too low, add the brake fluid to it. This is problematic, and I was only told about it today when I was talking to a repairman.
The way to judge whether the brake fluid needs to be replaced is to use the instrument to measure the moisture content of the brake fluid. In fact, the moisture content of the brake fluid is high, and it does need to be replaced, otherwise the brake cylinder may be replaced several times. Because the moisture content of the brake fluid is high, it will corrode the piston inside the brake cylinder, resulting in rusty pistons. However, no car manufacturer recognizes the equipment on the market to measure the moisture content of brake fluid, and everyone relies on this equipment to judge whether the brake fluid needs to be replaced, which is a bit unreliable.
Many people don't notice a problem, that is, our brake oil pot has a sensor that comes with the original car, and this sensor is used to detect whether the brake fluid is normal. If the brake fluid is too small, too dirty, or even deteriorated, it will detect it and turn on the brake system fault light as soon as possible. Among them, the deterioration of the brake fluid is actually that the moisture content is too high, so the sensors of our original car have not been reported to fail, why are you in a hurry to replace the brake oil? I have a deep understanding of the quality of brake fluid, so let's tell you about my experience.
I used to drive a large forklift in a factory, and as I told you in my previous article, our forklifts often have brake failures, so we will always have brake fluid with the car. But the brake fluid given to us by the repair shop has 2 kinds of packaging, one is an iron can, and the other is a plastic can, and this kind of iron can is a relatively poor brake oil, but it is also the most commonly used brake fluid in many repair shops. After our forklift and this kind of iron can brake fluid into it, there will soon be a brake failure problem, the brake is not completely out of order, every time people come to check it is to clean the piston in the brake cylinder, because the piston is rusty and inflexible, resulting in brake failure. Changing to a plastic bottle of brake fluid rarely has this problem. Today, the master of the repair shop told me that some brake oil is really not good, even if it is a new brake oil will corrode the brake cylinder and cause rust problems, I combined my previous experience in driving a large forklift, I understood what he meant, we will suffer a big loss if we change to poor quality brake oil.
Therefore, if the sensors on your car have not alarmed, you will change the brake fluid, change to a good quality brake fluid that is nothing, if you change to a poor quality brake fluid, it must not be as good as the original car's brake oil, in this case you will soon have to change the brake cylinder. It is better not to change, the brake fluid used in the original car can not be used, at least when the sensor of the original car has not alarmed, it proves that the brake fluid is no problem, we pay attention to the inspection in the process of maintenance. Many people are worried about whether their cars will fail if they don't change the brake fluid, in fact, I think your worries are a bit unfounded.
If your brake fluid has always been translucent and translucent, it proves that the brake system does not have the problem of rust and air leakage, and the brake fluid is less exposed to impurities in the system, and there is no problem in this case. I have driven a car for 9 years, and I have never changed the brake fluid after 100,000 kilometers, but I check the color transparency every time I maintain it. My boss's imported Kia has never been changed for 15 years, not that it has to be changed for many years, but it depends on the situation. There are many problems that are prone to brake failure, mainly in 2 situations, the first situation is that the brake cylinder is corroded, and you will be stuck if you don't open it for a long time, and the brake will fail.
The second situation is that the brake system leaks, causing the brakes to fail. Generally, if the brake cylinder leaks, we can see it every time we check it, and if we find that the brake fluid is abnormally reduced, we will give priority to checking whether the brake cylinder is leaking. If it is not the brake cylinder leakage, it may be the brake line perforation, which will suddenly leak oil in the process of using the car, we should pay attention to check whether the brake line at this position in the figure below is damaged. Because this section of the pipeline is a hose, it is very easy to bulge and deteriorate during driving, and then there will be a break.
The above is about the question of why the brake fluid can't be changed casually, if you think what I said is helpful to you, don't forget to give me a thumbs up, thank you.