YES lol I did check it and actually there is a minor leaking issue. EX. If it sits for 2weeks, which it does there would be a puddle in my pan and i need to refill. could it be the Brake Master Cylinder? Im nervous because after checking the rotors and pads. It appears I need new of both, but this hissing sound makes me nervous. Im not 100% what this is? I hardly drive it in Central NY because of weather ( rain and BAD winters. So I dunno..hopefully this info can lead you to a conclusion? Please help! thanks so much , Dan