What Causes Brake Noise?
2 Answers
The reasons for brake noise are: 1. Different hardness of brake discs leads to uneven wear; 2. Severe wear of brake pads results in direct metal-to-metal contact; 3. Foreign objects entering the friction disc causing noise when braking; 4. Improper installation of the brake system. Brakes are part of the vehicle's braking system and require regular maintenance. Maintenance intervals are typically based on the mileage or time recommended by the vehicle manufacturer, usually around 7,500km to 15,000km or 6 months, whichever comes first. Maintenance should be performed by professional technicians, with key tasks including cleaning, lubrication, tightening, and inspecting relevant braking and safety components.
I've been working in the auto repair field for many years and found that there are various reasons for brake noises. The most common one is when the brake pads wear down to their limit, the metal indicator will emit a sharp screech to remind you to replace them. Or, small stones or dust get stuck between the brake disc and pads, like sand grinding on a plate—a few hard brakes might clear it out. In humid weather or after rain, moisture can cause temporary friction noises, which usually go away after driving for a while. However, if the noise is persistent, sharp, or accompanied by vibration, you should suspect brake disc warping or loose lining. This issue shouldn't be delayed. I recommend checking the brake system thickness every 10,000 km—replace immediately if it's below the standard value. Avoid slamming the brakes in dusty areas as part of regular maintenance. This habit can save a lot of trouble and ensure driving safety.
