The contact owns a 2015 Ford Explorer. The contact stated that while operating the vehicle, the odor of exhaust fumes was present inside the cabin of the vehicle, causing the driver and the passenger to experience nausea and dizziness. No medical assistance was required. The contact was concerned that there was possibly carbon monoxide hazard inside the vehicle while driving. The cause of the failure was not yet determined. The manufacturer and local dealer were contacted regarding ethe failure, but no assistance was provided. The contact was informed of NHTSA Action Number: EA17002 (STRUCTURE, ENGINE AND ENGINE COOLING). The contact stated that the vehicle had experienced the failure listed in the investigation. The failure mileage was unknown.