my bmw 2002 330i has a hissing sound when pressing the brakes and when it's idle on 2002 BMW 330i

what needs to be fixed and what"s the cost?

Asked by for the 2002 BMW 330i
2 answers 2 comments
sounds like you have a vacuum leak or a brake booster is your pedal hard when you brake?
thank you
Brake booster Dont know the cost
thank you