Brakes can squeak for a variety of reasons, but continuous squeals and grinding sounds may mean it’s time for new brake pads or shoes. Worn brakes can mean longer stopping distances and difficulty stopping in an emergency situation. Rotors and drums that are too thin may even become over-stressed and break.
Brakes rarely fail suddenly. They deteriorate slowly with wear. Brake life depends on many factors, such as terrain, city vs. country travel, driving style, and even climate. Brakes are a normal wear and tear item for any car, with heavy emphasis on the wear. Eventually, your brake system parts are going to need replacement for performance and safety reasons.