What Causes the High-Pitched Squealing Sound in Car Brakes?
2 Answers
Here are the specific reasons why car brakes produce a high-pitched squealing sound: 1. Improper installation of brake pads: When installing new brake pads without resurfacing the old brake rotors, it results in poor fitment. This mismatch or installing new pads directly on unworn rotors causes uneven contact between new pads and the irregular rotor surface, ultimately leading to uneven wear on the new brake pads. 2. Brake system malfunction: There might be inherent defects in the brake system causing only partial contact between brake pads and rotors. This increases pressure per unit area, resulting in abnormal noises. It's recommended to inspect components like calipers and guide pins. 3. Foreign object presence: Debris causing surface mismatch leads to abnormal sounds.
My driving experience tells me that sharp, screeching sounds from the brakes are mostly due to severely worn brake pads, where the warning indicator is rubbing to remind you that it's time for a replacement. This situation is quite common. If not addressed promptly, the brake discs may get damaged, leading to higher repair costs and compromised safety. Sometimes, the brake pad material being too hard can also cause this, especially with cheaper brands or after rain, when noise is more likely. Additionally, rust or dust buildup on the brake rotors can lead to sharp noises—try gently applying the brakes over a short distance to alleviate this. However, never take it lightly; if you hear such sounds, go to a professional shop for an inspection immediately. Remember to maintain your brake system regularly; an annual check can prevent major issues, saving you money and giving you peace of mind.
