Back to all

The Edible Engine

December 28, 2025

You may have had a friend whose vehicle was the victim of hungry rodents.  After all, mice, rats and squirrels—even rabbits—have been known to gnaw on wires in engine compartments, causing vehicle electrical systems to go haywire.  They can disable a vehicle completely and be very expensive to fix.

In 2017, some drivers noticed their vehicle's wiring was being chewed and found out the automaker was using a relatively new material for covering their wires: soy.  Many of the repairs to their new vehicles weren't covered under warranty by the manufacturer when it was discovered rodents were eating the wiring.  So the owners filed a class action suit, saying the soy covering was essentially baiting the critters. 

The automakers tell a different story, saying mice, rats and squirrels have been chewing through wire insulation long before it was made out of soy. 

Regardless of what the insulation is made of, vehicle owners should make sure rodents aren't chowing down and creating a problem in the engine compartment.  They can have their repair facility check for these signs:  Little bits of acorns, leaves, chewed up plastic and animal droppings in the engine's nooks and crannies.  Using a black light, your technician can detect animal urine, a sure sign that they've been using your engine compartment as a warm apartment, a nest and a dining room. 

You can take steps to prevent rodents from chomping your vehicle's parts.  Honda—one of the vehicle manufacturers that uses soy-based wiring covering—makes a rodent tape.  It contains a spice called capsaicin that rodents find too hot to handle.  Other preventative measures include installing metal mesh around wiring harnesses or spraying the engine compartment with special rodent-repellants. 

Rodent damage can cost one vehicle owner thousands of dollars to fix, not the kind of bite anyone wants taken out of their bank account. 

Charlie's Fast Lube Jackson
1901 E. Jackson Blvd.
Jackson, Missouri 63755
575-243-2226

Need Service?

Request a Quote

More articles from Charlie's Fast Lube Jackson

Steer Clear of Power Steering Problems (Power Steering Maintenance)

March 29, 2026

We usually take our vehicle's easy steering for granted until something goes wrong. Power steering is what makes it almost effortless to turn the steering wheel, aiming your vehicle in the direction you want to go. Without the assistance of power from the engine, steering would be a laborious pr... More

Smooth Operator (Shock Absorbers)

March 22, 2026

When you are comfortably headed down the road, you may not realize how many of the imperfections in the driving surface are being smoothed out, so you hardly feel most of them. You can thank your shock absorbers for a lot of that comfort, and its important to make sure you keep your shocks in go... More

Not-So-Common Sense (Sensor Failures)

March 15, 2026

So your vehicle won't start. What's the first thing that comes to mind? Battery dead? Starter motor worn out? Out of gas? Well, those are all reasons that make sense. But your vehicle may be refusing to start because one of its computers is being warned that to do so might damage it. Here's ... More