Where is the oil sending unit on a 2000 Nissan Quest and how do you change it?

On my 1999 Nissan Quest, it is located under the car (front passenger side), just above where the oil filter screws in. It has an electrical connector on one end, and it screws into the car on the other end. After removing the electrical connector, just unscrew the oil sending unit. I heard there is a special 1-1/16" socket that makes the job easier. I am not sure as I have not tried to replace it. Based on where it is located, I suspect some oil to leak out when replacing it, so you may want to have oil handy.