Originally Posted by uspatriot1960
Not in a direct answer to your questions, but I will say that I have one of these on my 2006 325i and it makes a HUGE difference in seat of the pants performance. I haven't done any specific timed tests, but there is a monstrous difference when it is turned off and when it is set to race - which it always is - of course. Well worth the money IMO.
One more Q, did you ever face any kind of error or something?
Would be interesting to see what does the diesel 3er owners have to say about the same...