Hello again, so here's how my problem progressed. WIshing I could get some help with this problem. Please note that we dont have any emission regulation where I am located hence I really find this issue a PITA :-( I wish I could delete the whole SCR thing (grrrr) but lets tackle that later on..

So a month ago, I got the 200 miles countdown and the incorrect fluid warning message. Refilling the DEF fluid didn't clear/solve the issue so I brought it to an indy BMW certified shop. They did the "process of elimination" methodology: started with draining the DEF tanks, cleaning them and checking the metering valves. Everything checked out ok. Then they went on to the NOX sensors and found NOX sensor #2 defective hence they replaced this.

After replacing the NOX sensor #2. It seemed like they have eliminated everything related so I was instructed to run the X5 on a dyno for 1 hour continuously running at 70kph. They said the fault will clear out after I do this. So I did that today. UNFORTUNATELY, that did NOT reset the countdown and I am now down to 86 miles to complete shutdown. Of course I brought the X5 back to the shop. They said they will run some tests again and will keep me posted. That's where I am right now after more than 1 month of having the X5 in the shop (waiting for the flushing, cleaning and parts NOX sensor took 1 week to ship).

Did you guys find anything wrong with the things that were done? Any step missing?

Million dollar question is...I really want to delete the whole SCR thing because I dont need it. Is there a thread or DIY you can point to me so I can have this procedure done? I really dont have any use for the SCR because we do not have any regulations on emissions here? Any suggestion will be very much appreciated. TIA!