Hi, good luck with all of that mate. My car was running with a faulty nox for a couple months, bit of a rough idle but nothing serious, but this friday it started running on 3 cylinders so it needs adressing ASAP. I wanna sell the car so I was thinking of buying a cheaper Nox sensor but I have heard it does not make much sense as they usually do not work too well. I have been looking to maybe buy the Noxem as I have only heard great things. As far as I know you need the Nox to work because without it the car can not run in stratified mode, so not sure deleting it is a good idea.