TL* THE CONTACT OWNS A 2015 FORD EXPLORER. THE CONTACT STATED THAT WHILE DRIVING AT APPROXIMATELY 35 MPH OR ABOVE, THE ODOR OF EXHAUST FUMES EMITTED INTO THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER, WHERE IT WAS DIAGNOSED THAT AN UNKNOWN VALVE RELATED TO THE AIR CONDITIONER NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED BUT THE FAILURE RECURRED. THE CONTACT MENTIONED THAT THE FUMES CAUSED HEAD ACHES THAT DID NOT REQUIRED MEDICAL ATTENTION. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 500.