the oil pump is located inside the oil pan.
With your arm and a repair manual
Here is a link to a service manual, http://pdftown.com/Nissan-Xterra-2001-2004-Service-Manual.html . i hope it helps!
Directly on the bottom of the motor.
5.5 Quarts
Lift up the passenger rear seat and there is a plate. Remove the plate and right there is the fuel pump. Easy to change out. This is on the xterra not the pick-ups.
hi how to change supercharg oil nissan xterra 2002
how to change fuel pump from 2002 xterra
3.5 us quarts with filter
how do you release the fuel pump from the bottom of the tank on a 2000 xterra
The oil pump on a 2001 Chevy Monte Carlo is changed by draining the motor oil, removing the oil pan, and unbolting the oil pump. A new pump can then bolted in place, pan re-installed, and the oil refilled.
The 2001 Nissan Xterra has 16 valves.
The cost to replace the oil pump on a 2001 Jeep Cherokee Sport ranges from $300 and $500. Replacing the oil pump requires the oil pan to be removed.