The sump plug is located on the base of the engine, and it is accessed from underneath the car
You will need to remove the sump cover. Release the plastic fixings
Undo the fixings using long nose pliers and a screwdriver
Don't forget to place a suitably sized receiving tray underneath
Use an 8mm SQ socket to carefully remove the sump plug and fully drain the oil. When the sump has emptied, wipe clean the sump plug area with a paper towel
Replace (new) sump plug and washer. Do not over-tighten
Find a Haynes product for your Nissan:
Search by registration mark
Search by make & model