Solution: Mice and rats hate the ozone smell. buy one of those little clean air machines, install it under the hood and plug it in at night. For extreme infestations buy a bigger unit and run it all the time. I do this in the tornado shelter and tree house. Kills bugs too. Don’t breathe in the concentrated stuff.
We live rural. They ate the wiring out of my brothers new Toyota pickup once. Now they do not bother it.
I have had good luck with dryer sheets.
I place them in the engine compartment and on the dash and floors too.
This is in my classic car that sits over the winter.
no mice issues in the two years I have been doing this.
Not sure how it would work in an everyday driver, but you can jam dryer sheets just about anywhere.
Great use for sheets we quit using years ago. Smell one yourself to get the effect. kind of overwhelming.