THE ENTIRE WHEEL AND TIRE SUDDENLY CAME OFF THE CAR WHILE DRIVING ON A CITY STREET GOING STRAIGHT. THE WHEEL LUGS HAD SEVERED OFF /BROKEN OFF COMPLETELY. THE VEHICLE WAS AT A 40 MPH SPEED. THE CAR WAS TOTALED. THIS CAR WAS VERY WELL MAINTAINED BY INDEPENDENT VOLVO MECHANIC AND HAD NEVER BEEN WRECKED OR INVOLVED IN AN ACCIDENT BEFORE.