* Brake caliper or pads: Worn or damaged brake pads, a seized caliper piston, or debris caught in the caliper can cause a grinding noise that synchronizes with wheel rotation. This is a very common cause.
* Wheel bearing: A worn or damaged wheel bearing is another highly probable cause. As the bearing deteriorates, the moving parts grind against each other, creating a rhythmic grinding sound. This is a serious issue that needs immediate attention to prevent complete bearing failure.
* Damaged rotor or drum: A severely warped, cracked, or otherwise damaged brake rotor (disc brakes) or drum (drum brakes) can produce a grinding noise. You might also feel vibrations through the brake pedal or steering wheel.
* Stone or debris stuck in brake system: Sometimes a small stone or piece of metal can get lodged between the brake pad and rotor/drum, causing a grinding sound.
* Loose wheel: While less likely to cause a *grinding* noise, a loose wheel can cause other noises and is a safety hazard. Check your lug nuts to be sure they are properly tightened.
What to do:
1. Safety First: If the noise is loud or accompanied by vibrations, reduce your speed and pull over safely. Driving with a severely damaged wheel bearing can lead to a catastrophic failure.
2. Visual Inspection: Carefully inspect the front wheel and brake assembly. Look for anything obvious like a damaged rotor, loose parts, or debris. You may need to remove the wheel to get a better look at the brake components.
3. Professional Inspection: Unless you have significant mechanical experience, it's best to have a mechanic diagnose and repair the problem. Ignoring the noise could lead to more significant and costly damage.
Do not attempt to drive the vehicle extensively with this noise. The underlying problem could worsen and potentially cause a loss of control. Have it checked immediately.
