Hi

This is my first post on this site (just moved from M3 to X5).
I completed the installation of the BMW retrofit kit on my M3.
The part number I bought from the dealer was 84 64 0302 157.
It seems this covers the E46 as well as the X5 but I would get this confirmed by the dealer.
Hope this helps and if you do need any help, then let me know

Thanks
Steve