![Does the power brake booster make a hissing or bearing noise until appling brakes which changes the pitch of noise? Does the power brake booster make a hissing or bearing noise until appling brakes which changes the pitch of noise?](https://www.justanswer.com/uploads/ebrock63/2009-07-14_203252_2009-07-14_142710.png)
Does the power brake booster make a hissing or bearing noise until appling brakes which changes the pitch of noise?
Can the brake booster cause the brake pedal to go to the floor? Also when the engine is turned on, a hissing noise comes from the booster especially when the 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
What is the cause of the hissing or compressed air sound that occurs when the brake pedal is pressed in a car? - Poe
![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 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](https://preview.redd.it/6z6dnd7n8j141.jpg?auto=webp&s=c46c6ba65c03943e21c511aa72916a59ca256259)