WHILE DRIVING VEHICLE AT 60 MPH THE REAR SEATBACK BROKE. THIS IS THE SIXTH TIME THIS HAS OCCURRED. OWNER IS VERY CONCERNED FOR HIS SAFETY. *AK DRIVERS SEAT BACK HAS JUST COLLAPSE THREE TIMES AND REPLACED. BRACKETS AT BASE OF SEAT WAS LOOSE AND CRACKED AT THE SAME SPOT MANY TIMES CAUSING LOSS OF CONTROL WHILE DRIVING. *YH