No update because, as the weather started to warm up, the problem disappeared so I am 100% positive my radar is failing at low temperature ( less than freezing ) and zero to do with the PPF. I have not had one failure since it warmed up outside and I was getting it every trip when freezing outside. For a while I could not figure out why going to work was fine and coming home was not and it was because the car is garaged and work is parking outside. There has not been one report on the boards about PPF creating radar issues. I would fully recommend going ahead. Remember....the Tesla guy also told me the sun affects the radar....at that point I knew what I was dealing with.