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What Causes the Brake Pedal to Feel Very Hard When Pressed?

1 Answers

VonMakayla

07/30/25 5:37am

There are several reasons why the brake pedal may feel very hard when pressed: 1. Vacuum booster pump leakage or malfunction: While driving, when applying the brakes via the brake pedal, the force exerted on the pedal needs to be amplified by the brake booster pump to achieve the braking effect. If the car's brake booster pump fails, pressing the brake pedal becomes difficult, and without the assistance of the booster pump, the brake pedal will feel very hard. 2. Booster pump failure after engine shutdown: If you notice that the brake pedal feels very hard or even immovable after the car is turned off, it is because the vacuum booster pump loses its vacuum when the engine is off. If you find that the brake pedal cannot be pressed after stopping the car, you can restart the vehicle to resolve this issue.

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