Forgot to mention that customer was told that no faults would be flagged. According to BMW dealer it is a safety built in, in-case driver falls asleep with his foot on throttle pedal when not moving. Tried to believe this but not quite there yet. It is true that our emission machine testers WILL not pass this model. What should be done is we pass the vehicle as long as the CO is at 0.00 and keep the results with an explanation why you passed. The answer is not to cheat as you are not getting a true reading. Les