The brake sensor wire mainly consists of a brake warning sensing device and a conductive metal wire. Through the circuit and spring steel sheet, when the brake pads reach their wear limit, the vehicle computer automatically determines this and illuminates the red warning light on the instrument panel. Using brake sensor wires in the braking system enables accurate and intuitive monitoring of brake pad wear via the automotive electronic display, greatly helping users stay informed about vehicle conditions, carry out timely and accurate braking system maintenance, and reduce the probability of accidents.