What Causes the Car Brake Pedal to Be Hard to Press Down?

1 Answers
DeColin
07/29/25 8:58pm
Car brake pedal being hard to press down is due to a malfunction in the vacuum booster pump. Solution for vacuum booster pump failure: The vacuum booster pump is a component that provides assistance, allowing the driver to easily press the brake pedal. When the brake pedal is pressed, the master cylinder uses brake fluid to push the wheel cylinders, which then press the brake pads against the brake discs, enabling the car to decelerate. The wheel cylinders contain multiple pistons that push the brake pads. Therefore, when the car brake pedal is hard to press down, it is necessary to promptly visit a vehicle repair facility to inspect the vacuum booster pump. Check for leaks, wear, damage, and other issues, and carry out timely repairs or replacement. Maintenance of the vacuum booster pump: The brake fluid in the vacuum booster pump needs to be replaced regularly. If not replaced for a long time, it can lead to reduced braking force and extended braking distance. Brake fluid is a liquid that easily absorbs moisture. When the moisture content in the brake fluid reaches 3%, it must be replaced immediately. After replacing the brake fluid, it is also necessary to bleed the air from the brake system lines. Regularly inspect the vacuum booster pump for damage, leaks, and ensure proper lubrication.
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