It’s possible that what you’re smelling is oil or power steering fluid on your exhaust headers. That will get picked up by the air intake as you drive. Another possibility is your trunk lid seal is bad and exhaust from the tail pipe is being drawn in. Your car is newer, not really likely that either of these is a possibility. But then, neither is a broken exhaust pipe. Was the car wrecked or damaged in some way? Any kind of visible leaks on the engine or near the headers? If the smell is bad when you first start the engine, is it only this bad when the engine is cold or when you are sitting at idle too, like waiting for a traffic light?
On a car this new I wouldn’t think fumes could get inside the car except by coming in the air vents somehow. All the seals should be in good shape.