Thanks for all your feedback guys! Just heard back from BSR
BSR: 2004-11-25 00:31
We do not recomend to switch ECU at all.
Often there is a lot of program changes beetween model years, so by 99% we can say that the newer box woun't fit the older car.
Sorry for this bad news.
Med vänliga hälsningar /BSR
I hope this thread will benefit others looking to purchase ECU's that were programmed for other models