Originally Posted by Rotary Rocket
Yes, basically the complications of electronics of a late model.
The E46 is a lot easier to work with. We are using the stock ECU and harness. I might do an AEM standalone later. We are talking with AEM and they are working on a system that will accommodate the throttle by wire and the Vanos. I will keep you all posted.
Pectel SQ6. If you can afford it, get one. They are fantastic and support anything you can throw at em. (Vanos, throttle by wire, etc.)