What Causes the Sudden Hardness and Inability to Press Down the Brake in an Electric Vehicle?

1 Answers
DiJade
07/30/25 12:17am
There are several reasons why the brake in an electric vehicle may suddenly become hard and difficult to press down: 1. Related to pressing the brake before shutting off the engine: The vehicle's braking system operates at its maximum efficiency when the engine is running, and the brake booster is the key component that amplifies the force applied to the pedal. If the engine is off, the brake booster will not function, and typically, pressing the brake pedal three times will deplete its remaining vacuum force. 2. Leakage or malfunction of the brake booster: If the brake pedal is pressed when the engine is off, or if the brake pedal becomes difficult to press while driving, it is likely due to a malfunction in the brake booster. This could be caused by a vacuum tube leak or blockage in the brake booster.
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