Does a squeaking sound when braking mean the brake pads need to be replaced?
2 Answers
Vehicle brake disc and pad replacement limits are: brake discs must be replaced when single-side wear reaches 3MM, and brake pads must be replaced when remaining thickness is 3MM. The following are reasons for squeaking sounds during braking: 1. Rust on brake discs or pads: After prolonged parking, especially in humid climates or after rain, some rust or dirt may form on brake discs or pads. This usually resolves after driving for a while, or you can apply butter or specialized lubricant at the connection between brake pads and calipers. 2. New brake pads: New vehicles or recently replaced brake pads may produce similar sounds. New brake pads and discs require a break-in period, and such noises during braking are completely normal. However, if the sound persists after extended use, there may be an issue. 3. Excessive wear on brake discs or pads: Both components are high-wear items that experience friction during every brake application. Long-term use naturally causes wear, and excessive wear will produce abnormal sounds, necessitating regular inspection and replacement. Typically, brake pads should be replaced every 60,000-80,000 kilometers, while brake discs should be replaced every 100,000-120,000 kilometers.
I recently encountered the issue of squeaky brakes as well, and it doesn't necessarily mean you have to replace the brake pads immediately. Often, it's just because newly replaced brake pads need a break-in period, and the noise will disappear on its own after a few days of driving. It could also be due to dust or metal shavings accumulated on the brake rotors, which can be resolved with a simple cleaning. Another possibility is that the brake pad wear indicator is alerting you—if the noise becomes louder or more high-pitched over time, it's time for an inspection. What annoys me the most is the squeaking sound after rainy or humid weather, which is usually caused by rust or moisture affecting the components; a few brake applications usually make it go away. I recommend not rushing to replace the pads—first, visually check the thickness of the brake pads. Generally, if they're thicker than three millimeters, they're still usable. If the thickness is below the standard or the brakes feel spongy, you should head to a repair shop immediately. Don’t forget that regular maintenance helps the braking system—I get mine checked every six months. In short, squeaky brakes aren’t always a bad thing; most of the time, it’s a minor issue you can handle yourself. If you’re really unsure, consult a professional mechanic.
