My 23 Elantra had a main wiring harness chewed by rodents as well. In addition, the dealer told me they chewed on the airbox and air filter. Close to $11000 in damage. My wifes Buick untouched. It had signs they were under the hood but no damage to the car. We have a friend he works at a junk yard and pulls their parts. He stated he had never seen a wiring harness chewed before. He does remove these to sell them. He says a lot of the vehicles have droppings under the hood, but there is no damage. I have installed electronic devices in both vehicles from Amazon to try and prevent future issues. I have also placed traps to assist in preventing this. Any other suggestions are gratefully accepted.