WHILE DRIVING THROUGH A ROUNDABOUT AT APPROXIMATELY 25 MPH, THE VEHICLE WAS HIT ON THE RIGHT SIDE REAR SLIDING DOOR BY ANOTHER VEHICLE. TWO OF MY CHILDREN WERE IN THE SECOND ROW SEATS. THE RIGHT SIDE DOOR WAS CRUSHED AND THE GLASS WAS SHATTERED AND PROJECTED THROUGH THE VAN TO THE LEFT SIDE. THE SIDE CURTAIN AIR BAGS NEVER DEPLOYED. THE AIR BAG LIGHT WAS NOT ON, SO THERE WAS NO INDICATION OF A FAULT. THIS IS A SERIOUS SAFETY CONCERN AND SHOULD BE ADDRESSED.