Crash test ratings are just as pernicious as the CAFE targets, as they evaluate how the vehicle fares in the crash, but do not factor in how well whatever the vehicle hit did. This results in bigger, heavier vehicles.
They also do not factor in the odds of getting in a crash in the first place. Thus, we get vehicles with worse and worse driver visibility due to thicker support columns and smaller windows.
You can’t ignore the dollar cost of the MRI which could easily run $3000. The dollar value of a QALY is hard to pin down (and would vary widely between individuals) but typically for medical interventions is placed around $100K for cost/benefit analysis. With those numbers, and using your numbers for the benefits, you get a net of −0.005 QALY.
Of course, I’m sure the cost could be brought down, if enough people were pushing for it.