In general, there are a few signs to watch out for that may indicate it's time to replace your brakes. Firstly, if you notice a squealing or grinding noise when braking, this could be a sign that your brake pads are worn down and in need of replacement. Additionally, if you notice any vibrations or pulsations in your brake pedal when you apply pressure, this could be a sign that your discs are warped or damaged and need immediate attention. Finally, if you notice that your vehicle takes longer to stop than usual, it's certainly time to take your car in to be inspected, as this could indicate failing brakes.