What severe mechanical failure can occur if a driver continuously rides the foot brake pedal during a long, continuous downhill mountain descent?

1. Tire tread freezing from rapid airflow
2. Thermal brake fading (制动器热衰退/热失效), where excessive friction heat boils brake fluid and glazes brake pads, leading to complete loss of braking power
3. Fuel tank pressure collapse
4. Engine oil instantly turning into solid carbon