The executive wagon I have, only has electric windows in the front. How hard is it to install the electric windows in the back, and do I need extra wiring for it, does the BCM need to be upgraded (currently MID BCM)? I am looking on eBay for a 4 window console switch, and will also need to source the rear door panels to swap the manual winders for electric.
I have done this task without a problem. It just took a few hours once I got all the bits together. You need 2 electric window regulators, the electric center console switch, 2 rear door switches and 2 rear door wiring looms. I just went to the the hardware store and found 2 black plastic plugs to cover the holes from the manual winders and cut holes for the rear door switches. Once you have all the bits you need to drill out the pop rivets that hole the manual regs out and fit the electric ones. The loom and swithches are plug and play.
Good luck!