Hi I have a 1999 mitsubishi 1.8 gdi and took it for MOT it failed on brakes not enough , the mechanics said it needed a new master brake cylinder and brake cylinders in wheel this has been done and it is still not working there is no brake on one wheel and they are now saying that it needs abs unit I am loath to spend more money if it does not solve problem does anyone have any ideas , please help desperate now with a bill of over 300 and still no end in sight .