Answer
Jun 27, 2025 - 10:26 AM
To test a brake booster, start the engine and let it idle, then turn it off and press the brake pedal several times; if the pedal becomes harder to press, the booster is functioning. For the master cylinder, inspect for leaks and ensure that pressing the brake pedal results in firm resistance; if the pedal feels spongy or sinks slowly, it may indicate a faulty master cylinder.
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