Ultrasonic rodent repellers sound like the perfect car-rodent solution. You put a little device near the car, it makes a sound you mostly cannot hear, and the mice and rats decide to take their chewing business somewhere else. That would be lovely. Unfortunately, rodent prevention is rarely that clean. Ultrasonic repellers may help in some situations, especially as one layer in a broader prevention plan. But they are not a force field, and they should not be the only thing standing between your wiring harness and a mouse with poor life choices. Quick Answer: Do Ultrasonic Rodent Repellers Work for More…
Do Cars Have Soy-Based Wiring? Why Rodents Chew Car Wires March 19, 2026
Updated July 2026 Many drivers first hear about soy-based wiring after discovering chewed wires, warning lights, or a rodent nest under the hood. Repair shops and online forums often blame modern wire insulation made with soy-derived materials. Some vehicles do use plant-derived materials in components, including certain plastics, coatings, foams, and wiring-related materials. But the claim that mice chew automotive wires because they taste like soy goes further than the available evidence supports. Quick answer: Soy-derived materials may be used in parts of some modern vehicles, but rodents also chew conventional plastic, rubber, foam, and petroleum-based wire insulation. Cars attract More…