There is almost 100 service bulletins on these. The can be stopped by a "water bulkhead" sheet of plastic, the active tanks have been faulty for years and only just redesigned, the latest one only making it a year and a few months.
Yes, they sold it to me knowing it needed the active tank replaced. I know it wasn't neglected or abuse.
I don't dislike BMW, we have a 3 series and have had several before.
But... the X5 35d is a pretty delicate vehicle. I need something I can count on, and it seems like this vehicle has an engine code for"raining" or "dirt roads".