I’ve got this same problem!Mine Too
My Driver Side Door and now the Passenger door have gone bad, same with a friend who has the same car. Could this be a class action lawsuit to force infiniti to fix these things for free. Never done that sort of thing, but it seems like we could petition the company with a bunch of owner names and maybe they're agree to fix problem. (I doubt it but worth a try maybe?)
So the drivers side window controls no longer work for the drivers window or passengers window, it works for the back windows. Any idea what part would be needeed for this problem??to my knowledge there has not been a recall for the window motors or the door lock actuators. No extension of the warranty for this either. I'm not sure if USA-Actuators is still in business either. The last couple of postings in regards to them have been that they are not responding to emails/calls. If your problem is intermittent then I would pull the drivers side switch assembly and check/clean all connections.
Otherwise, the only fix that I know of at this point is to replace the motors with oem or aftermarket. Not particularly difficult from what I know as there are plenty of youtube videos out there these days.