You mentioned you let your X warm up before you back out of the driveway. Does it stall if you just jump in and go and does it stall any other times other when it is cold out--whatever cold is in MT. 40 in Dallas would be a new event. Any other symptoms?

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas