Hey everybody, I talked to BMW Canada and they said they "would consider helping" if it was there active tank but only if it was dealer diagnosed.
Took it to the dealer, they ran the bill up to $487 bucks and told me the number 4 engineer management fuse was blown. (Actually, the sock puppet behind the desk said it was the number 10 fuse. I said, "you mean it's a 10 amp fuse". He said, "No, it's the number 10 fuse. Is written right on it. I didn't kill him on the spot. Wanted to, didn't.)
Anyway, I'm waiting to get Carly but in the mean time I'm going to start unplugging things on the circuit, replacing the fuse, and power it up to see if she blows!
I already unplugged the transfer pump under the passengers side front floor. At least I think it was a transfer pump, right in front of the air suspension compressor...
Next, I was going to go after the active tank. I'll pull the inner fender liner out tomorrow, unplug the tank, replace the fuse, flash it up and see what happens.
I have a question though...
.1 when I unplug the tank, am I going to kill it? If the system runs out of urea, it shuts down and you're on a flat deck to the dealer.
.2 would you guys have an order of things you would unplug and check that might be more suspect than others? I would think anything like a pump would be more prone to failure than something like the egr that's on the same circuit?

I'm sorry but you lost us by jumping steps. Get the codes first.
A bad active tank or scr wouldn't make you run rough. A blown fuse either. It would just not start.
But what did bmw tell you after you gave them diagnostic money.
I don't hear besides then telling you a fuse? Breathe and think straight, get the codes they saw on paper.
Without codes we can't help you and you are just making it harder for diagnosis.. One step at a time

I know these new electronics are hard to troubleshoot at times, it's overwhelming to me too sometimes but you can't get far by shooting in the dark.

They didn't/wouldn't provide the codes. And, the mystery is that the number four circuit runs the SCR system. Almost everything, the active tank heater, level sensor, transfer pump, etc, is on that circuit and it still runs.

Ok! Finally got the proper codes today... Thank God for small miracles
004B6C heating crankcase ventilation, activation
0047FE reducing agent metering valve, activation
0046C4 reducing agent pressure line heating, activation
00480F NOX sensor after catalytic converter
0046CF reducing agent change over valve, activation
004A6F glow control until
004BAB reducing agent active tank fill level sensor
004BCB reducing agent passive tank fill level sensor
0046E4 reducing agent active tank heating activation
0047E9 reducing agent delivery pump
004D42 reducing agent repumping unit
004AB4 DDE control unit internal injector bank 5 voltage control
004F6F high irregular rotation

I hope you guys can work with this!!!
Thanks again

Most of the codes "reducing" look related to the fault of blown fuse. Are you blowing fuses when you replace it? First try that before you start unplugging things.

Injector code and irregular rotation could be a bad injector, there's been a problem with the x5 having leaky plastic at the passenger side, which drips onto the engine cover and corrodes the injector(s) 5 and/or 6. I had to replace both and yes the car stumbled and stalled at times because of this. IMO remove the engine cover and the foam and don't put them back. I can't find the thread right now on the plastic engine cover repair, but I will post it later if I find it.

Hi Rob! I did test the transfer pump on the passengers side, changed the fuse, power up, and it blew. The next thing I was going after was the active tank. Seems to be all over the road what the warranty or"good will program" is. Unfortunately, I don't live in California which seems to be 120,000 miles/ten year.
I was wondering, is there another pump in or near the passive tank under the driver's seat floor? I thought I should start with the passengers side transfer pump and then the active tank?

Also, with a dead scr, shouldn't this thing be a pylon right now?!?

active tank is nationwide

Yeah, it is in the US! Your lucky!! Canada? Not so much...
To add insult to injury, this one was replaced in Dec of 2015 at another dealer. They won't honor the two year part warranty because my friends owned it at the time.

Ah, you were the one that bought up "California".

Did not realize the two year warranty is limited to the owner at that time....



My actual understanding is that parts previously replaced under a warranty DO NOT get a 'fresh' two year warranty- they only have the remainder of the original warranty that had been utilized for the first replacement