Brake Discs and Pads
Most car manufacturers will specify a minimum thickness for your brake discs. When your brake discs go below the recommended thickness, you are strongly advised to replace them. Brake discs may need replaced due to wear and tear, or because of corrosion.
If your car brake pads are worn down, or your brakes are making squeaking or grinding noises, they may not be working safely and effectively. You should replace the brake pads for your own safety and the safety of other road users.