WHILE DAUGHTER WAS DRIVING ON HIGHWAY. THE LEFT FRONT LOWER BALL JOINT FAILED CAUSING THE WHEEL ASSEMBLY TO COME OFF THE CAR FRAME. SPEED WAS THE POSTED 55 MPH. NO OTHER TRAFFIC, THANK GOODNESS. WAS ABLE TO PULL OFF THE ROAD FOR ASSISTANCE. THIS IS A STUPID DESIGN. A MAJOR COMPONENT IF IT FAILS SHOULD NOT CAUSE THIS TYPE OF CATASTROPHIC FAILURE. IT DANGEROUS AND TOYOTA SHOULD WARN THE CONSUMER OF THIS STUPID DESIGN. *TR