NHTSA Complaint #10361473 — 2003 LEXUS ES300

I NOTICED WHEN I WOULD PULL OUT OF MY DRIVEWAY I WOULD HEAR A KNOCK WHEN I PUT THE CAR IN REVERSE ALSO; I WAS DRIVING HOME FROM WORK ONE EVENING AND IT WAS RAINING I WAS ON A BUSY FREEWAY, I WAS BEGINNING TO SLOW DOWN AND THE BRAKES WENT ALL THE WAY TO THE FLOOR AND A LOUD RUBBING NOISE OCCURRED I SLID FOR ABOUT A MIN. THANK GOD I WAS ABLE TO PULL OFF THE FREEWAY ,THIS HAS OCCURRED SEVERAL TIMES, I PREPARE FOR IT NOW BY BEING VERY CAREFUL. THIS IS MY ONLY MEANS OF TRANSPORTATION. JUST THE OTHER DAY I WAS ON A BUSINESS TRIP AND THE GUY THAT VALET PARKED MY CAR TOLD ME HE ALMOST HIT ANOTHER CAR, BECAUSE OF THE BRAKES GOING ALL THE WAY DOWN. I HAVE HAD THE BRAKES CHANGE AND 2 SETS OF TIRES WITHIN THE LAST 2 YRS NEITHER WAS THE PROBLEM. PLEASE HELP. *TR