Brakes are a vital part of a cars safety system and a fault in your brakes can cause you to have a serious accident. You are advised to test your brakes when you go on any car journey, simply by pressing the pedal down when going at a slow speed to ensure you stop.
Many cars have warning lights that will illuminate on the dash when your brake pads are low, but you shouldn’t rely on this totally as the sensor may be faulty or the dash not working correctly. Your brakes will be tested on an MOT inspection but your pads and or disc may need changing sooner than this.
When you have brake pads changed they will also inspect your discs to let you know if they also need replacing. If your car has a sensor then it may also need to be replaced as many get damaged when the pads wear low.