Where is the aftertreatmnt intake NOx sensor on Cummins ISX?

The one that you are listing is the recon part number, same thing. I edited my post between you posting that and after I originally posted mine. I was using a different truck, newer esn from the fleet I work on and got that part number. Also using two computers so it slows things down a bit on my side.

 

Well, when I use the newer esn from a 2014 manufacture date I got 3687930 as the part number so it seems that they did change part number for a truck 1 year newer. Wonder why they would do that?

 

Two 8mm headed bolts, one zip tie, and a 7/8 inch o2 sensor socket can make quick work of changing it. Otherwise you will need a 22mm wrench for the nut on the sensor itself.

 

Nope, you will cut it to remove the wire. It holds the wire away from the turbo and is tied to a line running near the path it wants to take. Without that zip tie there is the chance of the wire hitting the turbo and melting after prolonged contact.

 

Make sure you got right sensor from the dealer. Intake sensor has aluminum foil shield on wire. The outlet doesn't.
But before buying new sensor check the plug connection. If +12 volts connection is bad it will throw this co