If you exchange Wi-Fi in some cases won't work because of eprom tied with board, solution is to exchange 8 pin eprom from old module to new board which is inside module.
Or read data from old and write data inside new eprom on new board.
Wow, I hope not... I would have no idea how to dump or reprogram an eprom... I know there are videos out about dumping/reprogramming eproms for the optical drive, but I can't find any on this topic... I'm actually having trouble sourcing the wifi module here in Australia, the only ones I can find are on Ali Express, which take ages to get here...
Btw... in your last posts you were talking about a coil... I've got to be honest, I'm only an amateur/hobbyist guy, but I don't know what you are referring to when you are talking about the coil...