braking, all ok until I nearly depress all the way then it starts making a noise on 2004 Volkswagen Jetta

OK, I have called my mechanic but he hasn't called me back yet and am concerned... When I depress the brake pedal everything is ok until I get to the "bottom" of the pedal, you know, keep pushing down, then poof, it starts making wonky noises. It is a low grumbly noise. Almost grinding but not quite. The noise is coming from the back of the car and almost sounds like the trunk. To make do, I am downshifting and using the brakes as little as possible. Any thoughts? Thank you, Amie

by in Tulsa, OK on September 29, 2012
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1 answer
ANSWER by , September 29, 2012
start to check all brake lines for leak and check master cylinder.