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My brakes is making a hissing sound (like air coming free) when I brake but it isn't affecting the brakes, what could it be? Could it be a leak maybe? : r/Cartalk
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Hissing Noise From Brake Pedal
When I press the brakes in a car, there is a sort of hissing, almost compressed air sound coming from the brake pedal. What causes that? - Quora
brake booster hiss - Honda-Tech - Honda Forum Discussion
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Why does it sound like air when I press the brake pedal? - Quora
Car Clinic: What's causing the hissing noise that stops when I press the brake pedal?
