I can find next to no refernce to the PN either. What I did find was this, that shows a 2008 CIC control like 65129205283 will work in a 2004 car. So as long as it is from an X3, it will work, no matter when it was made.

You can then cross ref the 65129205283 P/N to see what other vehicles that fits, and find out your compatible donor vehicles list.