And the average across all 2-3 year old cars is 5%. It does not tall us much unless we would also get some information on how expensive it is to fix the proble

And the average across all 2-3 year old cars is 5%. It does not tall us much unless we would also get some information on how expensive it is to fix the problem. A 5% problem rate can be worse than a 15% rate if the cars in the 5% category have issues that are more than 3x more expensive to fix.