My in-laws drive Toyotas and found out the hard way that the wire loom is like soy or peanut based or something like that. Anyway, mice LOVE it! They had to buy this electronic rodent repellent device that mounts under the hood after their harness got chewed on in their RAV4 shortly after they bought it. Luckily warranty covered most of it.
Yep. My brother had mice do that to a BMW. Its a common topic on a hiking forum I lurk on that focused on high elevation stuff in Colorado. People will car camp at a 10,000' trailhead and end up bailing on the hike the next morning because they've been up all night battling hungry marmots trying to chew their wiring. Or worse, they'll leave it while they camp on the trail and come back to a disabled vehicle.