[sooper]

A not insubstantial amount, I'd predict.

(Anecdata) I had to prove that the work I did on a car (replacing the bumper) didn't cause a fire which burned down the garage and house it was in a week later.

That said, I do agree with your point that a brand new vehicle should not have these sorts of issues. Be interesting to see where the cause lay.

[mikeash]

I'm not sure about brand new vehicles. Cars have a bathtub curve like anything else. I expect car fires are mostly very old or very new cars.

[hnburnsy]

Just wondering but would insurance cover you in either case?

[madengr]

The burden of proof ought to be the opposite.