No BC, it doesn't go away. It begins about 60 seconds after starting the engine. The intake system passed a smoke test last summer when all new coils and plugs were installed along with a new fuel filter. CCV system was checked too. MAF seemed the most likely culprit because of the ambient air temperature sensitivity, but now I'm leaning towards the idle control valve. I'll pull it this weekend for inspection.


2002 X5 3.0 355,500 miles