TL* THE CONTACT OWNS A 2010 BMW X6. SHORTLY AFTER PURCHASING THE VEHICLE FROM A PRIVATE OWNER, THE CONTACT STATED THAT EXCESSIVE SMOKE CAME OUT OF THE TAIL PIPE AND HE DISCOVERED SERVICE BULLETIN NUMBER: 110815. THE VEHICLE WAS SERVICED BY BILL JACOBS BMW (630-357-1200, LOCATED AT 2495 AURORA AVE, NAPERVILLE, IL 60540), BUT THE CONTACT WAS UNCERTAIN IF THE VEHICLE WAS SERVICED BY A RECALL AND IF THE VALVE STEMS HAD BEEN REPLACED. THE CONTACT STATED THAT THE REAR OF THE VEHICLE WAS SMOKING EXCESSIVELY AND THERE WAS A REDUCTION IN POWER. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURES AND THE CONTACT WAS WAITING FOR A RESPONSE TO DETERMINE A REPAIR REMEDY. THE FAILURE MILEAGE WAS NOT AVAILABLE.