Have had the car checked now by two very reliable mechanics. They are both stumped!! Changed the master cylinder four times and the spongy brakes to the floor are still the same. There is no visible leaks to brake lines all four wheels calipers, brake shoes, etc., there is no visible leakage of brake fluid when car sits for a long period of time. I refuse to take it to the dealer at the risk of being raped. This car SUCKS!!!!! It also SUCKS Brake Fluid!!!!