At the first sign of wear and tear on your Geo brakes, inspect them immediately to see if they need to be replaced. Neglecting or delaying to replace worn-down brake parts can lead to catastrophic accidents or engine damage - so make it a habit to check your Geo brakes regularly. Luckily, the Geo brake system is designed to give you plenty of warning that brake failure is approaching. The brake pedal might be 'hard,' or resistant to pressure. Or, the brake might require a tremendous amount of pumping to react quickly. There might be vibrations or pulsing when you hit the brakes. You might hear squealing at low speeds that are emitted from your break wear sensors. You can check for brake pad wear by viewing the pads from outside the front tire. On most cars, you can look through the openings on the outside of the wheel/rim assembly to see the pads. If the pad depth is less than ? inch, then replace the Geo brake pad soon. If it's less than 1/8 inch, you are risking damage to the rotor and replace those pads with genuine Geo brake pads immediately. Instead of ordering parts through a dealership that will charge you high fees, consider ordering genuine Geo brakes through car-stuff.com.