A grinding noise from your brakes is a serious warning sign that requires immediate attention. The most common cause of brake grinding is severely worn brake pads, where the friction material has completely worn away, allowing the metal backing plate to rub directly against the brake rotor. This metal-on-metal contact creates a loud grinding sound and causes rapid, expensive damage to your rotors. At Hoover Street Auto Repair, we've seen Ann Arbor drivers continue to operate their vehicles with grinding brakes, which turns a simple brake pad replacement into a much costlier repair that requires new rotors and sometimes even calipers.
Grinding noises can also indicate damaged, warped, or excessively worn brake rotors with grooves, scoring, or uneven surfaces that cause the pads to grind when they contact them.
A stuck or seized brake caliper that fails to release properly can cause continuous contact between the brake pad and rotor, producing grinding sounds even when you're not applying the brakes.
Foreign debris, such as rocks, gravel, or road debris, trapped between the brake pad and rotor creates grinding noises and should be addressed promptly to prevent rotor damage.
In some cases, particularly for Ann Arbor drivers in winter conditions, a combination of rust, salt, and moisture can cause brake components to corrode and grind. If your grinding noise occurs primarily when turning rather than braking, it may indicate failing wheel bearings or CV joints rather than brake issues.
At Hoover Street Auto Repair in Ann Arbor, we offer same-day service for most brake repairs, and we strongly recommend you bring your vehicle in immediately if you hear grinding noises—continuing to drive with grinding brakes is dangerous. It will significantly increase your brake repair costs as rotor and caliper damage accumulates.