Ask any workshop and you will hear the same thing: newer cars come in with chewed wiring far more often than the older ones. It seems backwards — a brand-new car should be tougher, not more fragile. So what changed? The answer is hidden inside the wires themselves.
The wires got tastier
To cut cost and be more environmentally friendly, many carmakers moved away from older petroleum-based plastic and started using insulation and coatings made partly from soy and other plant-based materials. It is a genuine step forward for the planet. But to a rat, a wire that is partly made of soy does not smell like plastic — it smells a little like food.
Rats do not actually digest much of it. They gnaw because their front teeth never stop growing and they must file them down constantly, and a soft, food-scented wire is the perfect thing to chew. The result is stripped insulation, exposed copper, and warning lights that appear for no mechanical reason.
Why parked cars are the real target
A rat is not chewing while you drive. It moves in when the car sits still — overnight, over a weekend, or during a festival trip when the car is parked for days. A warm engine bay with soft nesting spots and food-scented wires is, from a rat's point of view, an ideal home.
The four things that actually protect your car
- Keep the bay clean — no leaves in the cowl, no food wrappers, no clutter to nest in.
- Park smart — away from garbage, drains, bushes and open food.
- Check often — droppings, a musky smell, or bite marks mean act now, not later.
- Make the bay uncomfortable — run an ultrasonic deterrent so rats never settle in the first place.
That last step is the one most people skip. The EchoRepel Car Rat Repellent mounts under the bonnet in about five minutes and runs while the car is parked — exactly when rats move in. It will not un-soy your wiring, but it stops the bay from becoming the comfortable nest that leads to a ₹40,000 repair.