Crank position sensor

Can someone please tell me where to find the crank positioning sensor on my 2000 Sentra GXE with 1.8 liter motor. I need to replace it and got a new one but can't find the old one. Thanks

isn't it one of the recall on 00 sentra? or is it the cam position sensors? or.....they r just the same shit with different names?

I believe I have found it. I talked to someone that said that the crank and cam sensor look just alike. I think that Autozone sold me the wrong sensor and I had been looking for something that wasn't even on my motor. I'm going to the dealer this am and double checking about the recall and location. Thanks