Why does my car squeal when braking?
Brake squeal is most commonly caused by brake pads vibrating at a high frequency as they contact the disc. This can happen with new pads, worn pads, or glazed discs. Unlike grinding (which means the pads are worn through), squealing often occurs when pads still have material but need attention. If the squeal stops when you apply more pressure, it is often the pad wear indicator — a deliberate warning.
Likely causes
Brake pad wear indicator squealing
A metal tab deliberately designed to squeal when pads reach minimum thickness — replace soon
Glazed brake pads or discs
Hard, shiny surface on pads or discs causes squeal — can be from overheating or low-quality parts
Dust or debris on disc surface
Temporary squeal that clears after a few braking applications
Low-quality aftermarket pads
Budget brake pads are more prone to noise
Worn brake pads (pre-grinding stage)
As pads wear thin, they can squeal before reaching metal-on-metal grinding
Repairs you may need
Typical cost range: £70–£280 — Brake pads per axle: £70–180. Discs: £80–200 per axle. Full axle service (pads + discs) £150–320.
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