* Worn brake pads: This is the most common cause. When the brake pads wear down to their metal backing plates, the metal scrapes against the rotor, creating a grinding sound. This requires immediate attention; driving with worn pads can damage the rotors.
* Worn brake rotors: Severely worn or damaged rotors (the metal discs the pads press against) can also grind. Grooves, scoring, or excessive rust can contribute to the noise.
* Stuck caliper: A brake caliper that's seized or sticking can cause the brake pads to constantly press against the rotor, leading to grinding and potential overheating.
* Loose caliper bolts or hardware: If the caliper isn't properly secured, it can move and cause the pads to rub against the rotor unevenly.
* Foreign objects: Sometimes, small stones, pebbles, or other debris can get lodged between the pad and rotor, causing a grinding sound. This is usually a less consistent noise.
* Parking brake issue: A partially engaged or malfunctioning parking brake can also contribute to grinding.
What to do:
1. Don't ignore it: Continued driving with grinding brakes will worsen the damage and potentially lead to brake failure.
2. Inspect your brakes: If you're comfortable and have the necessary tools, you can inspect your brake pads and rotors yourself. Look for thin or worn pads, scored rotors, and any obvious signs of damage or sticking calipers. However, if you're not comfortable doing this, skip this step and go straight to a professional.
3. Get it checked by a mechanic: This is the safest and most recommended course of action. A mechanic can diagnose the exact cause of the grinding and perform the necessary repairs, which may include replacing brake pads, rotors, calipers, or other components.
Safety Note: Compromised brakes are a serious safety hazard. Do not drive your vehicle until the grinding noise is investigated and repaired by a qualified mechanic.
