A brake sensor is one of the most vital parts of the brake system because it cautions you when your brakes get worn out. It also indicates other factors like brake pressure, brake disc temperature, etc. This part is usually attached to the braking pads and can also predict its remaining lifespan. It lights up your dashboard to inform you about the same. Once the brake sensor fails, it cannot be repaired but replaced. It is because sensors are designed for single-use only. In other words, the brake pads and brake sensor repair are not possible. It is because they will keep showing the warning light even if you have replaced the pads.