That isn't all you need to do though iamhe77, just to add to what you have already posted: (in my examples i used my vin but blanked out a bit of it.)
depending on how you have done your part search, via a vin number or just a model code (you can enter just WC34 for example and browse all the parts for the WC34 series stagea). you may have to cycle through the illistrations to get the one displaying the parts you are after.
after you choose the part number on the illistration you have to go back out to the first screen with the cars details displayed. you will see the part you just selected will be listed here. i have picked an alternator/fan belt. to get the full nissan part number you need to click a button up the top, shown in this pic:
after you click that your part number will be displayed
sometimes there will be more than one partnumber for a part, especially when you are searching parts via model code, you will get this screen pop up, all you do is select the part number with the correct year model, engine type/transmission type you are after. it can also pop up if a part has been subceeded with a newer/different part.
another thing that you may be interested in is the factory fitted options for you car