I've searched but cannot seem to find the exact part number for my PCM unit. I have a 2008 C4 Cab with Bose and Nav. The car has 150k miles and has been used as daily driver since I got it in 2009. My PCM screen has largely flickered to death over the last month. I may replace it with a used unit or go after market. When searching for a used unit, I am finding the part number 997.642.143.xx. XX is listed as 03, 10, or 11. Does it matter? Will any of these out of a Bose & Nav car work in my 997.1 or does only one specific model fit?

Thanks for the help.