Do you know anyone who has had their car wiring harness or fuel line chewed by rodents?

My neighbor is a live-and-let-live kind of guy. He uses HavAHart traps when he needs to catch mice in his house. That kind of guy.

He has 2 vehicles: 2014 and 2015 Mazdas. About a month, ago I helped him repair his electrical harness that had been chewed through disabling one spark plug. After resoldering and fixing the car he thanked me and laughed off the rodent issue.
Yesterday, his other car died while his wife was driving and had to be towed to the dealer. He was just quoted $2100 to fix the harness above the fuel tank! It had been chewed through by rodents.
After 2013, many new vehicle harnesses are made of “eco-friendly” soy-based sheathing that rodents enjoy chewing. This appears to be more of a problem in rural areas and includes cars made by Toyota, Honda, Mazda, Subaru, and other makers.
I’ve been looking around and see that there have been class action suits over this issue.
One judge recently denied the suit saying the evidence was anecdotal and there is no scientific data to substantiate the claims.
What data can individuals provide that show this is an issue?

Do you know anyone who has had this problem? What did they do?