I have a 2016 Ram 2500 diesel. I have been getting the code U029E and I just got the message that I have 20 miles left to drive before I'm limited to 5 MPH. I took it to the dealer and they said it is a NOX Sensor Module. The ticket says "bank 3 number 1". Is there only one Module to replace? And is an aftermarket part as good as the OEM part?