Fuel trims point to a vacuum leak. Did you check the intake elbow? You might need to smoke it to find it.
Wow, lots of miles on it.
Please post O2 fuel trim levels. Short term and long term.

Dang, too from me to smoke. I have a nice little smoke machine.

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'06 X5 3.0i - bought @143,123 miles (12/26/20)