The contact owns a 2016 Ford Explorer. The contact stated while driving approximately 40 MPH, the accelerator pedal was depressed, and there were exhaust fumes entering the cabin of the vehicle. The contact stated that the exhaust odor entered the vehicle while depressing the accelerator pedal and was constant. The contact stated there was no warning light illuminated. The contact had taken the vehicle to a local dealer, where it was diagnosed and determined that the failure was related to Technical Service Bulletin Number: 17-0044; and the recommended that the repair be performed. The contact was advised that the vehicle was no longer under warranty. The vehicle was not yet repaired. The manufacturer was informed of the failure and referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 100,000.