I have a 2006 Murano (same replacement procedure as for your 2007) that threw the code P0345 Camshaft Position Sensor A Circuit Bank 2. This is the one nearer the front of the engine, on the driver's side (the other is also on the driver's side, but more toward the back/firewall).
The symptom (besides the code) was that the car was hard to start. I would have to tap the gas pedal while it was cranking to make it start (which I suspect caused the computer to adjust the engine timing, and caused it to "get lucky" with the wonky cam timing and start the engine).
Anyway, there were no gotchas. One 10mm bolt comes out, the sensor pulls out, the new goes in, and can only go in one way and to one depth. No worries there.
The tricky parts were:
a) getting the electrical connector off - there is a colored slidable tab along one side that you must fully depress downward toward the engine block until you hear a "click". Then the connector pulls right off.
b) getting a socket wrench on the bolt (for the front sensor) is hard because there is a cast pipe right only about 1-1/2" away from the bolt head, leaving no room to get a socket on it. Some guys use a socket with an extension and they get on the bolt at an angle (I've seen some YouTube examples done that way), but when I did that, I could not get enough bite on the bolt to make it turn out. Plan on having a 10mm box wrench so you can get on it from the side with really good grip all the way around the bolt, so it will turn out without rounding off or breaking.
Otherwise... took only about 20 minutes, and all the starting problems went away immediately.