2018 2.5T interesting smell

My wife had a 2018 Mazda6 Signature with the 2.5T. I have noticed the last few weeks when she gets home from work the car has an interesting smell that lingers around for a while. So bad that when she parks in the garage we can smell it in the upstairs of our house(above the garage).

It’s extremely hot in Las Vegas right now which may be causing the smell to seem worse. It doesn’t smell like oil or coolant…… and I can’t see any leaks. Any thoughts on what this could be? Any known issues or areas I should be inspecting ?