A grinding noise when you press the brake pedal is a sound you should never ignore. In most cases, it means metal is rubbing on metal inside your brakes. The good news: if you act fast, the repair is usually simple.
What a grinding noise usually means
Your brake pads have a layer of friction material on a metal backing plate. When the friction material is gone, the metal plate touches the metal rotor. That makes a deep, rough grinding sound, and you may also feel it in the brake pedal.
Common causes of grinding brakes
- Worn-out brake pads. This is the most common cause. The pad is used up and the backing plate is hitting the rotor.
- A stone or debris stuck in the brake. A small rock can get caught between the rotor and the dust shield. This makes a loud scraping noise, even when you are not braking.
- Rust after the car sits. If your car sat outside in the rain or snow, a thin layer of rust forms on the rotors. The first few stops may sound rough. If it goes away after a few stops, it’s normal.
- Damaged rotors. Deep grooves or a heavy rust lip on the rotor can cause grinding, even with good pads.
- A stuck brake caliper. If a caliper does not release, the pad keeps rubbing and wears out very fast on one wheel.
Is it safe to drive with grinding brakes?
No, not for long. Grinding means your brakes are not working as well as they should. Your stopping distance can get longer, and the damage gets worse every time you brake. Drive only as much as you need to, go easy on the brakes, and get them checked as soon as possible.
Why waiting costs more money
When you hear squealing, you usually only need new pads. When it turns into grinding, the metal plate starts cutting into the rotor. Now you need pads and rotors. If you wait even longer, the caliper can get damaged too. Fixing it early keeps the job smaller. See brake pads vs. rotors: what needs replacing.
Grinding only when you turn?
If the grinding happens mostly when turning and not only when braking, it could be something else, like a worn wheel bearing or a CV joint. A quick inspection will tell you the real cause.
What to do next
- Don’t wait for the noise to “go away.” It usually won’t.
- Avoid hard braking and highway driving until it’s checked.
- Book a brake inspection right away.
Not sure how long your pads should last? Read how long do brake pads last.
Grinding brakes? We can check them today
President Tire & Wheels offers a free brake inspection and same-day brake service at 632 Colby Drive, Waterloo. Brake pads and rotors start at $350 per axle with a 1-year warranty, or $499 per axle with a 2-year warranty (most sedans).
Get a free brake quote, visit our brake service page, or call (226) 698-1667. We serve Waterloo, Kitchener and Cambridge.
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