Don’t wait until you hear grinding noises to have the brakes inspected. Have brakes checked periodically for wear. We use a brake grading system12-8mm’s condition green =good, 5-6mm’s yellow=good ½ worn, 4mm’s last yellow=start thinking about replacing brake pads, 2-3mm’s red=replace now. Some warning signs of brake problems are: noises when brakes are applied, the steering wheel shakes when brakes are applied, needing to add more than 2 oz. of brake fluid to the brake reservoir, a soft or squishy brake pedal, or the pedal goes to the floor slowly while brakes are applied. Brake fluid should be replaced every 30,000 mile or every other year.