What Causes Car Brake Noise?
2 Answers
Here are the reasons for car brake noise: 1. During brake disc break-in period; 2. Normal activation of ABS system; 3. Foreign objects between brake pads and discs; 4. Rust on brake disc surface; 5. Excessive wear of brake pads or discs; 6. Assembly issues; 7. Problems with new brake pads. Below is extended information about car brakes: 1. The braking system consists of control system, hydraulic system and booster system. The brake device generates friction between the brake pads and wheel drum or disc, converting the kinetic energy during car movement into heat energy during the friction process. 2. The principle of braking system is to create enormous friction that converts vehicle's kinetic energy into heat energy.
I've run an auto repair shop for over a decade and handled countless cases of brake squealing. Common causes include excessively worn brake pads where the metal indicator scrapes the disc, producing a squeaking sound as a replacement reminder; or debris/pebbles stuck on the rotor that can be resolved with cleaning; uneven brake discs causing vibration noises; and moisture-induced rust on disc surfaces creating friction sounds during initial braking. I always advise car owners not to delay—get it checked at the first sign of noise. Neglecting it could lead to pad depletion damaging the discs, resulting in higher repair costs. Improper installation like missing shims can also cause noise. Safety comes first—visit a certified shop promptly for diagnosis rather than DIY attempts, as system failures can be dangerous if overlooked.
