Why Can't the Brake Pedal Be Pressed and the Steering Wheel Won't Move?

[Blake]

The inability to press the brake pedal and the steering wheel not moving can be caused by a faulty vacuum booster pump, excessive impurities in the master cylinder, or air leaks at the pipeline connections. Below are the explanations for these causes: Faulty Vacuum Booster Pump: If the vacuum booster pump is damaged, it will make the brake pedal extremely hard to press. Once the vacuum booster pump fails, it must be replaced immediately, as it will affect the normal operation of the braking system. The braking system is a critical component of a vehicle, directly impacting driving stability and safety. Excessive Impurities in the Master Cylinder: Too many impurities in the brake master cylinder, poor sealing, a failed vacuum booster pump, or contaminated brake fluid. Air Leaks at Pipeline Connections: Brake fluid mixing leading to vapor lock when heated, oil leaks in the master or slave cylinders, or air leaks in the air reservoir or pipeline connections.