The brake disc is attached to the wheel and rotates whenever the wheel is in motion. To bring the vehicle to a stop or to slow down, two brake pads located in a caliper move together to grip the disc. The harder you press the foot pedal, the greater the force applied on the brake disc.
Over time the brake pads inevitably wear down until there is no more surface face left and what grips the brake disc is the underlying metal structure. The squeak is this bare metal making contact with the brake disc.
Sometimes, though, a squeak can be caused by a stone becoming lodged in the brake caliper or in hot countries an excessive build up of dust or grit. Chances are it is simply worn brake pads.
Is it dangerous? Yes, because your car does not have the full braking power it needs, and could cause, in rear wheel drive cars especially, a skid under heavy braking as there would be less pressure applied on one wheel than the others. And you could end up having to replace the brake disc too if it becomes too heavily scored.
If the car does not have good brake pedal or pulls to the left or the right when braking take your car straight to the shop for repairs, it is dangerous to drive.
Grinding noise means no pad left, tow your car to the shop
A rock or dirt caught in the brakes
Or a brake pad that has worn down too far....there is a metal clip that will be touching the drum when brakes are applied and the brake pads are wore out. The brake pads will not squeak when they are like new if applied correctly and not warped.
If your car is making noise or you hear weird sound when you apply breaks then you should not avoid this problem. Because this problem can lead to accident. So it's better to get regular car service or get your car's break inspected from the best mechanic Winnipeg. You can also follow some basic car break maintenance tips to save your self from this problem. And to get best car break service please visit at best brake shops Winnipeg.