1. Squealing or Grinding Noises: If you hear squealing or grinding noises when you brake, it's a clear indication that your brake linings are worn out. This noise is caused by the metal backing of the brake pads rubbing against the brake rotors.
2. Brake Pedal Feel: If you feel the brake pedal going down further than usual before the brakes engage, or if it feels spongy or soft, it may indicate worn brake linings.
3. Loss of Stopping Power: If you notice a significant decrease in the stopping power of your vehicle, it's a sign that your brake linings may need replacement.
4. Visible Wear: If you can visually inspect your brake pads and see that they are significantly worn down or have less than 1/4 inch (6 mm) of friction material left, they need to be replaced.
5. Uneven Wear: If you notice that one brake pad is worn out more than the other on the same axle, it could indicate a problem with the caliper or brake hardware, and the brake linings should be replaced.
6. Warning Light or Message: Some vehicles are equipped with brake wear sensors that illuminate a warning light or display a message on the instrument panel if the brake pads are worn out.
It's important to note that different driving styles, road conditions, and vehicle types can affect the wear rate of brake linings. If you're uncertain about the condition of your brakes or if you experience any of these signs, it's best to have your vehicle inspected by a qualified mechanic to ensure your safety on the road.