Originally Posted by deejaygee
I really don't see how, 4 years on my e90 never had a problem even when I had the system checked over after ems light came on.
I think the answer lies in your comment - "4 years on..." Technology doesn't stand still and a lot has happened in that time.
If you think about it from BMW's pint of view, it's perfectly understandable for them to utilise any software to counter warranty claims resulting from unapproved engine modifications.
Annoying nonetheless, but a sign of the times - 'Big Brother' is well and truly with us.