Judging whether the car brake pads need to be replaced is an important part of ensuring driving safety.
The thickness of the car brake pads is a direct basis for judging whether they need to be replaced. The thickness of new car brake pads is usually about 1.5 cm. As the use time increases, the car brake pads will gradually wear out. When the car brake pads are worn to only one-third or one-quarter of the thickness of the new car brake pads, that is, about 5 mm, it is necessary to consider replacing them. For some models, the thickness of the car brake pads can be directly seen from the side of the tire, and for those that cannot be seen, the wheel needs to be removed to check. In addition, you can also use tools such as vernier calipers to measure, or use a flashlight to observe at a certain angle parallel to the wheel hub plane to intuitively judge the wear of the car brake pads.
The sound emitted when braking is also an important basis for judging whether the car brake pads need to be replaced. When the car brake pads are worn to a certain extent, the metal needle contacts the brake disc, and a sharp abnormal sound, such as a "tearing" sound or a metal friction sound, will be emitted when braking. This sound usually means that the car brake pads have been worn to the limit, or the warning iron sheet on the car brake pads has worn to the brake disc. At this time, the car brake pads should be checked and replaced as soon as possible.
The change in braking effect is also a reference factor for judging whether the car brake pads need to be replaced. If the braking performance feels significantly reduced when braking, such as the braking distance becomes longer, the braking response is slow or the brakes are soft, and the car cannot stop in time even if you step on the bottom, then it is likely that the car brake pads are seriously worn. At this time, the car brake pads should be checked in time and replaced according to the actual situation.
Some high-end models are equipped with a brake wear reminder function. When the car brake pads are worn to a certain extent, the car brake pads warning light on the dashboard will light up to remind the owner to replace the car brake pads in time. This is a very intuitive reminder method. The owner should pay close attention to the warning light on the dashboard to detect and replace the worn car brake pads in time.
When the car brake pads are worn more, the gap between the disc and the plate will become larger. This will cause the master cylinder to need to add brake oil, while the brake oil is reduced or the brake fault light is on. In addition, if the car brake pads are oily, they need to be replaced regardless of their thickness. Oil will affect the friction performance of the car brake pads, thereby reducing the braking effect.
The vehicle mileage and the driver's braking habits will also affect the wear degree of the car brake pads. Generally speaking, the front car brake pads can be used for 30,000 to 40,000 kilometers under normal driving, and the rear car brake pads can be used for 60,000 to 100,000 kilometers. But the specific life depends on factors such as vehicle model, vehicle weight, driving habits and road conditions. If the driver often brakes suddenly or drives on complex road conditions such as mountain roads and congested sections, the car brake pads will wear faster. Therefore, car owners should regularly check the wear of car brake pads according to their mileage and braking habits.
In addition to the above judgment basis, car owners should also comprehensively consider the replacement time of car brake pads. If the car brake pads are severely worn, cracked, damaged, or the braking performance is significantly reduced, the braking distance becomes longer, etc., the car brake pads should be replaced in time. At the same time, car owners should also pay attention to the condition of other parts of the brake system, such as brake discs, brake fluid, etc., to ensure the safety and reliability of the entire brake system.
It takes multiple factors to determine whether the car brake pads need to be replaced. Car owners should regularly check the wear of car brake pads and replace them according to actual conditions to ensure driving safety.
