Most common cause: pads worn through
When the friction material is gone, the steel backing plate rubs the rotor. You'll hear grinding and may feel vibration.
Other causes
- A stone or debris caught between the pad and rotor
- A seized caliper or slide pin
- Rusted rotors on a car that sat for a while
- Worn wheel bearing (grinding that changes when turning)
Why waiting costs money
Every mile of metal-on-metal grinding scores the rotor deeper. A job that could have been pads only turns into pads and rotors — sometimes calipers too. More importantly, stopping distance increases.
What to do
Drive gently and get the car inspected as soon as possible. If the brake pedal feels soft or sinks, don't drive — call for a tow.
FAQ
Can I just replace the pads if my brakes are grinding?
Sometimes, if caught early. Usually the rotors are damaged and need resurfacing or replacement.
This article is general information, not legal or insurance advice. Rules and policies change — check your policy and the official source, or ask us.