Ok so I don't know if I just noticed this today and it has been happening all along but when I apply the brakes I hear a "swoosh" sound. It only happens while I am applying the brakes, it doesn't happen if I am just holding the brakes. The harder I brake the louder the swoosh. I know if there is a hissing while the brakes are being held down it could be something like a vacuum leak or a bad brake booster diaphragm but again it only happens when I initially apply the brakes. Anyone else have this?
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