did mine on the weekend.
plugged the laptop into the car and found one o2 sensor stuffed. rang nissan up and wanted $225 each per sensor, and 2 week wait from japan.
or $98 each from auto1 but with rewiring and $60 for o2 sensor socket ( makes life a lot easier).
plugged laptop back in and reset ecu, and sensors are working. now just need to see how much better fuel economy is is like.