The contact owns a 2016 Chevrolet Equinox. The contact stated that while driving at an undisclosed speed, the contact heard a loud sound coming from the vehicle with a gasoline odor coming from the engine compartment. There was no warning light illuminated. The vehicle was taken to the dealer, where it was diagnosed that the exhaust manifold had failed and needed to be replaced. The vehicle was repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 120,000.