What Causes the Brake Pedal to Suddenly Become Stiff and Feel Like It's Stuck?

1 Answers
DelLandon
07/29/25 12:56pm
The reason the brake pedal suddenly becomes stiff and feels like it's stuck is due to a malfunction in the vacuum booster pump. When this occurs, the vacuum booster pump in the braking system should be promptly inspected and repaired. The function of the brakes is to reduce speed or bring the vehicle to a stop. Their working principle involves converting the kinetic energy of the moving vehicle into heat energy through friction between the brake pads and brake drum, as well as between the tires and the ground, thereby slowing down or stopping the vehicle. Causes of brake failure include: 1. Presence of impurities in the master cylinder or poor sealing; 2. Failure of the vacuum booster pump; 3. Contaminated brake fluid; 4. Leakage in the master cylinder or wheel cylinder; 5. Leakage in the air reservoir or pipeline connections; 6. Severe overloading; 7. Carbonization of the brake drum; 8. Insufficient brake fluid in the master cylinder; 9. Wear of the master cylinder piston.
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