[Dr. Sivana]

From Perplexity.ai, the best AI I have found:

Yes, modern cars do use soy-based insulation coating on their electrical wiring. Here are the key points: Since around 2000, almost all major automakers started using soy-based insulation for wiring instead of traditional petroleum-based insulation.

The soy-based insulation is cheaper for manufacturers and considered more environmentally friendly as it is plant-based and biodegradable.

However, this soy-based wiring has become an attractive food source for rodents like mice, rats, and squirrels who gnaw through the insulation, causing electrical issues in vehicles.

Automakers like Honda, Toyota, Kia, Hyundai, Audi, BMW, Dodge, and Nissan have all switched to using soy-based insulation on wiring in their vehicle models.

The problem of rodents damaging soy-based automotive wiring has become so widespread that some automakers have faced class-action lawsuits from owners over the issue.

So in summary, yes the use of soy-based insulation on wiring in modern vehicles from virtually all major brands has inadvertently made them more susceptible to rodent damage and related electrical problems.

[1Old Pro]

Just great, I had better get the car back in the garage.

[Omnivore-Dan]

Yes, I assume law suits will arise and after it costs vehicle manufacturers a bundle, they will switch back to petroleum based coatings. Their foolish attempt to save a few bucks is going to cost them big time.

[Erik Latranyi]

They have begun to add things to the soybean polymers to make it unattractive for rodents.