1. Brake pad wear indicator: Brake pads have wear indicators that make a squealing noise when the brake pads are getting low and need to be replaced. When you apply the brakes, the brake pad wear indicator is pushed back away from the brake rotor, stopping the squealing noise.
2. Loose brake caliper: If the brake caliper is loose, it can vibrate and make a squealing noise when you drive. When you apply the brakes, the pressure from the brake pads against the brake rotor holds the caliper in place, stopping the squealing noise.
3. Worn or damaged brake rotors: Worn or damaged brake rotors can cause a squealing noise when you drive. When you apply the brakes, the brake pads press against the brake rotors to slow down or stop your car. If the brake rotors are warped or damaged, the brake pads can vibrate against the rotors, causing a squealing noise.
4. Foreign objects: Sometimes, foreign objects like rocks or small debris can get caught between the brake pads and brake rotors, causing a squealing noise. When you apply the brakes, the brake pads press against the brake rotors, pushing any foreign objects out of the way, stopping the squealing noise.
If you are experiencing a squealing noise coming from the front driver's side wheel that stops when you touch the brakes, it is important to have your car inspected by a qualified mechanic to determine the exact cause of the noise and have it repaired if necessary.
