Why does my car make a grinding noise when braking?
A grinding noise when braking is almost always caused by worn brake pads where the metal backing plate is now contacting the disc. This needs prompt attention — the longer you leave it, the more damage is done to the discs, significantly increasing the repair cost. If the grinding is constant rather than just when braking, a seized brake caliper may be the cause.
Likely causes
Worn-through front brake pads
Most common cause — pads worn to metal, contacting the disc directly
Worn-through rear brake pads
Same issue at the rear axle — often accompanied by a vibration through the pedal
Scored or damaged brake disc
Often accompanies worn pads if left too long — grooves in the disc surface
Seized brake caliper
Caliper stuck on causes constant grinding and one-sided wear
Stone or debris trapped between pad and disc
Can cause a brief grinding that clears on its own
Repairs you may need
Typical cost range: £80–£380 — Pads only: £80–180 per axle. Pads and discs: £150–380 per axle. Caliper replacement: £120–320.
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