
The reasons for the brake system warning light to illuminate are as follows: 1. Severe brake pad wear. Brake pads are divided into two types: those with sensor wires and those without. Brake pads with sensor wires will automatically complete the circuit when worn to the limit, triggering the warning light. Brake pads without sensor wires do not have an automatic warning system but will produce a "metal-on-metal" hissing sound. 2. Low brake fluid level. Brake fluid plays a crucial role in the vehicle's braking system. When the driver presses the brake pedal, the force applied is transmitted by the piston in the master cylinder through the brake fluid to the wheel cylinders at each wheel, causing the brake pads to contact the wheels and stop the vehicle. Insufficient brake fluid is often accompanied by noticeably reduced braking power, and in severe cases, a complete loss of braking force. This issue can be resolved by promptly replenishing the brake fluid. 3. Other factors causing the brake system warning light to illuminate, such as brake system oil leaks or false alarms.


