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What causes the Audi A3's brake pedal to be hard to press and the car unable to start?

1 Answers

Ron

07/29/25 7:50pm

Audi A3's brake pedal being hard to press and the car unable to start may be because the owner stepped on the brake several times after turning off the engine, causing the vacuum in the brake booster pump to disappear. Without the booster's assistance, it becomes difficult to press the brake pedal. Additionally, the booster pump does not work when the engine is off, so the owner can only try to restart the engine and press the brake pedal firmly. Once the car starts, the brake will return to normal. Emergency braking: When driving at low speed and encountering sudden events ahead, emergency braking can be applied by pressing the brake pedal firmly. However, this should not be done at high speeds to avoid the vehicle skidding or overturning. Gradual braking: Under normal driving conditions, gradual braking can be used. Press the clutch pedal while releasing the accelerator pedal, shift to a lower gear, and after the speed decreases, release the clutch pedal and press the brake pedal until the car stops. Intermittent braking: When driving downhill on mountainous roads or in situations where continuous braking may generate high temperatures, intermittent braking by alternately pressing and releasing the brake pedal can effectively prevent the braking system from overheating.

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