DUE TO HYDROGEN EMBRITTLEMENT, THE KING PIN USED IN THE VOLVO 5.7 (12,500 LB) FRONT STEER AXLE MAY HAVE BEEN BROKEN DURING ASSEMBLY OF THE AXLE. CONTINUED OPERATION OF A VEHICLE WITH A BROKEN KING PIN MAY ALLOW THE PIN TO WORK LOOSE, CAUSE ERRATIC STEERING, AND RESULT IN POTENTIAL FOR LOSS OF STEERING CONTROL AND A VEHICLE CRASH.CORRECTION: VEHICLES WILL BE INSPECTED AND KING PIN REPLACED IF REQUIRED.