Originally Posted by normsbimmer
I really think they are doing this detuning prior to the performance package release. I'm going back to the dealer to have them return my car to its original state prior to the patch.
Good luck with this. I don't believe I have ever heard of a dealer down-leveling a car.
I doubt your dealer has the ability to do this or even knows how it can be done.
Suppose for example you brought your car in for an update and it crashed and bricked the car. (This happened to my E90 330i.)
What do they do? They call BMW and the two work together to do whatever is necessary, even to replacing ECUs, in order to get the car updated to the CURRENT level. They never even consider downgrading the car.
If you get your car re-programmed, it's a one way street.