One of my green-striped injectors malfunctioned and the check engine light started to flash and the engine started behaving abnormally. I went to the junkyard and he gave me four white-striped injectors. I replaced all the green ones with the white ones and the car didn't start. I re-put the green ones and just replaced the malfunctioned one, the car started but at sometimes the engine nearly dies when accelerating, and the power is not like before. Another junkyard man told me that "the white one is compatible with your 406" but, obviously, it isn't..Not sure? probably just different manufacturers. As far as I can tell all 406 petrol injectors are the same.