si_maxima

Hello. So sadly the other day my aux port went bad on my Maxima (the aux port on the radio receiver, I don't have the center console aux). I went to the dealership and they said they couldn't fix it and had to replace the whole radio for $1200. I told them to forget it and I went and ordered me a used factory radio receiver (pic) for about $70 (its on the way). so while I wait I did some research and saw something saying I have to reprogram the radio if I switch it? is this true? if im just switching to another factory radio receiver do I still have to reprogram it? or is it all just plug n play? thank you for any help/responses!