This is a totally newbie question but I can't find it anywhere through the search function. My oil pressure gauge is acting crazy. It's fluctuating from normal to 0 and back with no pattern. I'm pretty sure it is my Oil Pressure Sending Unit from all the posts I read however I can't figure out where the hell the Unit is located. I'm pretty sure it is by the Oil Filter but I want to be sure before I just start taking things off. So if someone could post a detailed description of where it is or a picture would be even better. Another question I have is it bad to drive the car around with a bad sending unit basically could I potentially do any damage? Right now the car sounds and drives fine but I don't want to hurt the motor. Thanks for the help.