Why Does the Brake Make a Squealing Sound When Reversing?
2 Answers
Reasons for abnormal noise when reversing and braking are as follows: 1. Normal noise phenomenon: It should be noted that brake pads are composed of iron plates, graphite, asbestos, etc. When they rub against the brake disc, some metal powder is inevitably produced, resulting in a slight squealing sound when braking. 2. Worn brake pads: Another reason for abnormal braking noise is that the brake pads have reached their wear limit. The brake warning plate rubs against the brake disc, producing a metal-on-metal grinding sound. At this point, the braking effectiveness significantly decreases, posing a serious threat to the driver's safety. It is crucial to replace the car's brake pads promptly to prevent potential hazards.
I've been driving old cars for a long time, so I'm all too familiar with that squealing sound when braking in reverse. It's probably because the brake pads have worn down smooth over time, causing the metal backing to rub directly against the brake rotor, especially noticeable when the rotor is rusty on humid days. Loose brake calipers or trapped dust can also cause that hissing noise. When reversing, the wheel's force direction changes, leading to uneven friction that easily produces noise. If not fixed promptly, it's not just annoying but can also increase braking distance, raising the risk of collision. I've been through it myself—completely resolved after the repair shop replaced the brake pads. I recommend getting it checked by a professional as soon as you hear this sound. Regularly checking brake pad thickness can prevent issues beforehand. By the way, a temporary fix on the road is to gently pump the brakes a few times to shake off dust, but don't count on it long-term. Safe driving is what really matters.
