Originally Posted by 3Wagon
So, other than maybe an i-drive software update and some possibly complex wiring, why couldn't this be retrofit on only e9x's?
Well, I don't know the schematic details of it, but I'll make a guess:
1. Wiring the USB into the center armrest compartment would require removing the center console and possibly portions of the dash.
2. A change might be required to the size of the opening in the console (or not).
3. A new chipset or board is likely to be required in the audio head unit to accomdate the input of the iPod without using the CD changer.
Of course, anything could be a retrofit. You could turn your 325iT into a 325xiT if you wanted to... it would just be really really difficult.