How often should brake pads be replaced? How do you know if you need to replace it?

The brake pads of the car are generally changed between 30,000 and 50,000 kilometers. When the vehicle is used for more than 30,000 kilometers, it is necessary to regularly observe the brake pads, check the actual thickness of the brake pads, and replace them immediately if they are too thin.

It needs to be judged based on the wear and tear of the vehicle. If the wear and tear of the vehicle is severe, then the brake pads need to be replaced.

I think the brake pads should be replaced every two years, and if you hear a sharp noise when braking, it means it's time to replace them.

As a qualified driver, you should have a good grasp of the state of the whole car during the driving of the car, especially the brake system of the car, such as the brakes of the car become soft and hard. When it comes to the brake system, I have to talk about the brake pads of the car, because the brake pads not only affect the braking performance of the car, but also a part that is easier for the owner to check and has a long maintenance cycle. But many car owners still have doubts, what is the replacement cycle of brake pads, and when should the brake pads be replaced?

Composition of brake pads.

Brake pads are composed of friction material layer, heat insulation layer, adhesive layer, back plate, etc. The brake pads push the back plate through the brake cylinder to press the friction material of the brake pads on the brake disc for braking, so the quality of the friction pads is particularly important. Some brake pad friction pad material is harder, the braking effect is poor but the service life is long, and some brake pad friction material is softer but the braking performance is good, from this point it can be seen that the life of the brake pad is directly related to the quality of the friction material.

Brake pad replacement intervals.

Car owners may have some controversy about the replacement cycle of brake pads, mainly because the owners of the repair shop want to extend the replacement cycle, and the repair shop wants to shorten the replacement cycle......Perhaps most car owners have encountered this situation, the car owner went to the 4S shop repair shop for maintenance, and the people in the shop only looked at the mileage of your car, and immediately recommended you to change the brake pads ......In fact, there are many times when the brake pads do not need to be replaced, whether the brake pads need to be replaced is not only related to the mileage, but also depends on the actual thickness of the brake pads.

When do brake pads need to be replaced?

In daily use, the owner should pay more attention to the thickness of the brake pads, and when the brake pads are worn to 3mm visually, they need to be replaced. If the owner does not have the habit of checking the vehicle, there is no problem, because there is an alarm sensor on the brake pads, when the brake pads are too thin, the brake pad sensor will alarm on the dashboard, the owner confirms that the brake pads are alarmed, do not panic too much, and drive to the 4S shop to replace it.

Summary: Driving habits have a great impact on the use of car brake pads, and the driver always steps on the brakes during the car driving, which not only consumes fuel but also wears the brake pads, especially when encountering traffic jams, the loss of brake pads is greater. One thing to note::

The front brake pad (front model) of many models needs to be replaced at 28,000 kilometers, but someone can drive the same car to 35,000 kilometers, because of driving habits.

Generally, the front plate is replaced once every 4 to 50,000 kilometers, because the engine leans forward due to inertia when braking in front, so it is easy to wear.

After the film 6 to 80,000 depending on the specific model.

1.Before replacing the brake pads, you should open the lid of the engine compartment brake fluid reservoir to see the height of the brake fluid page, if the brake fluid page is above the maximum limit, you should suck out some brake fluid to prevent the brake fluid from spilling during the replacement process.

2.Prepare the brake pads to be replaced and remove the wheel where the brake is located. During the dismantling process, avoid scratches on the rims.

3.Use a wrench combined with the sleeve to remove the bolts of the brake caliper, and then remove the brake pads (if there is a brake induction line, the brake induction line should be removed first). Observe whether the brake pads are overworn, or cracked, and if so, replace them in the next step.

4.Since there will be a lot of sand or mud in the brake calipers, it is necessary to remove them with a rag and then apply sound muffling paste to prevent abnormal noises when braking.

5.Use the piston pressure pump to press the piston to the position that cannot be pressed, then install the brake pads on the brake caliper, install the new brake pads in place (those with brake induction wires should also be installed), tighten the guide bolts, and the installation is completed.

6.After installation, cover the lid of the reservoir, enter the car and press the brake pedal a few times, and reset the brake. Then observe the brake fluid height and be within the appropriate height range.

7.After changing, test drive to check whether the braking effect is reflected.

Depends on your usage. It mainly depends on the frequency of use and road conditions.

Some cars have an alarm light on the dashboard, which indicates that it is time to replace it when it is on!

If there is no prompt, when the friction material on the brake pads grinds to the steel back warning line, you will hear a whistling sound, and you need to replace it immediately.

The reference standard is that the brake pads are ground to 1mm left, and they have to be replaced.

Open the brake oil cap, remove the tires, remove the brake pads, reset the pistons, install new brake pads, install the tires, and check the brake fluid level.

3 to 60,000 kilometers need to be replaced. In the braking system of a vehicle, the brake pads are the most important object, and the quality of the brakes is determined by the brake pads.

The replacement cycle of brake pads is not fixed, not only directly related to the service life of brake pads, but also depends on the driving conditions of the car and personal driving habits. Generally speaking, the car replaces the front brake pads every 3-50,000 kilometers or so, and the rear brake pads every 6-100,000 kilometers. When the car travels about 30,000 kilometers, check the front brake pads, and when driving about 60,000 kilometers, check the rear brake pads, you need to develop the habit of regular inspection and timely maintenance.

How to tell if brake pads need to be replaced

First, look at the thickness.

Generally, the thickness of the new brake pad is about centimeters, if it is worn to one-third, that is, when the thickness is less than 5 mm, it is recommended to replace it in time;

2. Listen to the sound.

If there is a metal friction sound when braking, it may be that the brake pads are worn to the lowest thickness, and the limit marks on both sides of the brake pads touch and rub to the brake disc to make an abnormal noise, which needs to be replaced in time;

3. Look at the tips.

Some models will have brake wear prompts, if the brake pads are worn too much, the sensing line will touch the brake disc, resulting in a change in resistance, resulting in a current, a signal is detected, and there will be a brake pad warning light on the dashboard.

Fourth, by feeling.

If you feel that the brake pedal is light, or you feel that the brake is hard and cannot brake the car, it means that the brake pads are seriously worn and the thickness is not enough, and they also need to be replaced in time.

How to replace the brake pads

1. To replace the brake pads, you need to lift the car and remove the tires;

2. Remove the screws of the brake caliper, remove the brake caliper, and remove the old brake pads;

3. Push the brake piston back and install the new brake pads;

4. Install the brake caliper back, screw the caliper screws to the required torque, and then install the tires back;

After the brake pads on both sides are replaced, you will find that the brake oil in the brake oil pot is overflowing, in this case, you need to press the brakes several times to keep the fluid level between max and min. The purpose of applying the brakes is to eliminate the gap between the shoe and the brake disc and to reset the piston of the sub-cylinder. Check whether the brake oil pump is working properly and confirm that it is correct, that is, the brake pads have been replaced.

Generally, the new brake pad needs to have a run-in period, and only after the run-in period can it play its brake role better and more effectively.

Brake pads are mostly iron, especially after rain, which is easy to rust. At this point, when you apply the brakes, you will hear a hissing sound of friction. This sound is normal for a short time, but if this sound accompanies it for a long time, the owner will replace it.

Because this phenomenon indicates that the wear of the brake pads has exceeded the limit. If it continues, it will affect the brake disc, and the hidden danger will increase over time. Once you have removed the brake caliper, you can remove and replace it with a new one.

This step is relatively straightforward. However, when replacing the new piece, attention should be paid to the position of the new piece, which is aligned with the fixing bolt hole to facilitate installation.

Install the new tabs, fasten the circlip, tighten the fixing bolts, and replace the brake pads. However, it is necessary to check the position of the brake pads and discs to see if there is friction or other anomalies. Brake pad mechanical fault reporting method and identification, based on their own driving experience for comprehensive judgment.

When the brake pads need to be replaced, the vehicle must be different, the brake pads are too thin, and during the braking process, there will be a noticeable screeching sound, which can be heard with a little attention. In the braking process, the braking distance is significantly extended, the braking stroke is extended, and the braking effect is deeply pressed. It will be better at this point.

Many disc alarm devices are installed on many brake pads. When the brake pads are not thick enough, there will be a chirping sound near the tire, which is very harsh. If you hear this sound, it is recommended to check the thickness of the brake pads, the general normal driving vehicle, the brake pads can travel about 7-80,000 kilometers, different models, slight differences, the wear of the brake pads is inseparable from the driver's driving habits.

If you are a very cautious driver, skilled in technology, not strenuous driving, emergency start, less braking, two pairs of brake pads before and after, more than 200,000 yuan of cars, running 150,000 kilometers, or even longer distances, generally do not need to be replaced. I've practiced it myself. If you drive fiercely, one foot on the accelerator, one foot on the brake, 60,000 kilometers, the brake pads will not work.

Drive reasonably, start lightly, stop slowly. Ahead of time**, collect the oil and slow down. When my car reached more than 300,000 kilometers, I sold it.

Before I sold my car, I ran 150,000 kilometers after the last time I got a new brake pad. The wear of the brake pads is only 50%, indicating that the quality of the brake pads is still good, mainly related to the driving style of the individual.

Observe the thickness of the brake pads. Because generally a new brake pad thickness is in, the thickness will gradually become thinner with continuous friction in use. As long as you observe and find that the brake pads have become much thinner than before, then you should be ready to replace them.

Listen to the sound to judge. As long as you are driving, there is a slight sound of "iron rubbing iron" when you step on the brakes, then the brake pads should be replaced.

For example, the thickness of the brake pad is about centimeters, it should be replaced in time, you can listen to the sound of the brake disc when braking, and you can also observe the braking distance of the brake; The brake pads should be replaced every three months, and if the braking time is relatively long and the distance is relatively long, they should be replaced in time.

Generally to 30,000 kilometers or 60,000 kilometers or so, it should be replaced in time, the brake pads have serious noise, and particularly thin, about only about one centimeter, braking when the frustration is relatively strong, braking time and braking distance are relatively far. Be sure to choose the original imported brake pads.

Like this brake pad is basically replaced once in the first half of the year, the first point is judged by some feelings of their own driving, and the second point of advice is that once you feel that it is not easy to use, you should replace it immediately, after all, the brakes of the car are very important.

These are all issues that we need to pay attention to, only in this way can we ensure the safety of our driving, so I hope you can pay attention to it. Because only in this way can we focus on these issues, otherwise there will be any accidents, and the result will be very terrible for us.

When braking, we feel weak and there is no ** force, we generally need to replace, in addition, the distance of the brake is longer than before, and the metal sound of the brake is louder, these two situations also need to replace the brake pads.

Look at the effect of the brake pads when they are used, whether they are particularly good, and you also need to look at the surface to see if there is rust, if these situations occur, you need to replace them.