If you can put it in an area with Decon. It will work but you need to protect it from animals. Putting Decon inside of a wire cage with an opening only mice can get in and out of works.
A mouse trap made of a plastic pail filled 1/2 full with water with a ramp going to the top and a peanut butter laced wire stretch across the top will entice mice to drown in it. It works very well. I would place a couple near the car. Killing mice is all that works. An option I’s to bury pail so top is at ground level with the wire accessable with out ramp.
This is similar though out doors use water instead of antifreeze. This is used by a feed store that I have seen.