Save you some money, this is very easy and you can do this DonDon, the oil sensor is at the bottom of the oil reservoir. Take the oil reservoir loose FIRST and empty the oil, THEN remove the oil sensor in the reservoir, take it [ oil sensor, not reservoir] to a dealer then install new one.
Don't forget to put the oil back in.
I have done this to my motor so it must be simple, cause you know how dumb you say I am.