Here is a photo of my original Bcm.
You need more than just a match for the Part number at the top staring with the A. From what I've figured out you also need to match the number beside the Temic and the HW and SW need to match, I assume that's the hardware and software numbers. And also match the number with the W in it.
The one that I currently have in is an exact match to everything except for the 03W38, the one I have in I believe is a 03W42 and it still isn't the right one, so know I bought one with an identical match to everything.. We will see how that works out.

So are you looking to put a retractable spoiler on your srt? If so I don't think that I would mess with your Bcm as it may cause you a bunch of other issues software wise.. Perhaps have it manually retract with a switch or figure a way to have it deploy during certain speed conditions etc.. Using another external controller or Plc ( programable logic controller) using ladder logic that you can easily program and work it out that way without using any of the cars systems.