If you search online about rodents damaging cars, you will quickly encounter a surprising explanation: modern vehicles supposedly use soy-based wiring insulation that attracts mice and rats. Some drivers claim rodents never bothered their vehicles until automakers started using “soy wires.” The theory appears frequently in repair forums and social media discussions whenever someone discovers chewed wiring under the hood. But how much of this claim is actually true? Do modern cars really use soy-based wiring, and is that why rodents chew through electrical harnesses? Like most things you read on the internet, while there are elements of truth, it’s More…
Why Rodents Chew Car Wires (And How to Stop It) March 10, 2026
Quick Answer: Rodents chew car wires because they need to constantly gnaw to keep their teeth from overgrowing. Modern soy-based wire coatings may also attract them. Preventing access and removing nesting opportunities is key to stopping the damage. Discovering chewed wires under the hood of your car can be both surprising and expensive. Many drivers assume the damage must have been caused by a mechanical failure, only to learn later that mice or rats have been nesting inside the engine compartment. There is also a lot of confusion about whether soy-based wiring makes rodent damage worse, but the real answer More…