When the CP4 failure rate first popped up from 2011 to 2013 there was some formal and maybe a review by National Safety folks. The Ford actual CP4 failure rate was 6 out of 10,000 with plenty of those being water, ethanol, DEF, or gasoline in the fuel, which is not the fault of Ford (or Bosch). I suspect as the motor and fuel industries have learned about the sensitivities, that the failure rate has gone down. Yes, it sucks if it happens to you, but the odds are low. I use Ford fuel treatment and try to buy from high volume stations to lower my personal risk.