Stop Mice From Chewing Wires In Your Car (Ultrasonic Rodent Repellent) , CLICK HERE for the Ultrasonic rodent repellent that keeps rodents and other pests away. These Ultrasonic rodent repellent devices helped me get rid of mice that were always making nests under the hood of my car. I would find cactus and weeds near the engine and the mice would sometimes chew up wires and leave droppings under the hood of my car. Don’t breathe in the droppings under the hood, stop the mice from going under the hood of your car by using an Ultrasonic Rodent Repellent.