They could cost you much more than a wiring replacement especially on EV's!
Tried a lot of stuff to keep rodent away from my cars & motorcycles and I believe only in one proven solution, mouse traps & peanuts butter.
I put at a pair of traps near each vehicle, its not perfect for sure, but at least I got some of these rodents.
Poison is terrible, you attract them somehow and they are rotting in places you can't access, beside representing a real danger for pets.
Electronic repellents are very convenient but they don't work at all, they are more a scam than a real solution.
By the way my garage is filled with with cloth baggies too.
I would be curious to know how others are dealing with rodents, winter is coming!