Why do brakes squeak?

Sometimes the brake systems of some vehicles may squeak during operation.

This phenomenon can be caused by several reasons.

Some types of brake pads emit a warning sound like a whistle before the end of their service life, and then they need to be replaced.

The second reason for this effect is various kinds of pollution that have accumulated in the area of ​​​​the caliper, which, when the brakes are working, rub against the discs, making a rattle. This defect can be successfully eliminated by cleaning the system or replacing the pads.