CAR STALLED ON HIGHWAY AT 45 MPH, STEERING AND LIGHTS WORKED, STALL CAUSED COLLISION-3 PEOPLE HURT. THE DEALER DOES NOT KNOW WHY CAR STALLED. CAR COULD NOT START UNTIL AFTER A COMPUTER CHIP WAS REPLACED. BUT WHEN CAR WAS RUNNING AND WE PULLED THE CHIP THE CAR CONTINUED TO RUN. NO ONE KNOWS WHY CAR STALLED. THE CONVERTABLE TOP LEAKED WATER, BROUGHT TO DEALER BACK THREE TIMES. BUT NOW THE CONVERTIBLE TOP DOES NOT COME UP ON WINDSHIELD FLUSH-BROUGHT BACK TO DEALER FIVE TIMES STILL WORKING ON IT. THE FRONT BRAKES BEGAN SQUEAKING AND PULLING AT 5000 MILES. THIS IS MY 4TH NEW CAR NEVER HAPPENED BEFORE.