Why Is My Brake Pedal Making Noise?

Why Is My Brake Pedal Making Noise? A hissing noise is usually the brake booster leaking air. There could be a leak in the vacuum line, the booster diaphragm, or the master cylinder. A small leak could cause a hissing sound when you press on the brake pedal or let off. Why does my brake … Continue reading Why Is My Brake Pedal Making Noise?