Hey Don, hope all is going well over there!
That is crazy high consumption, most likely a failed sensor somewhere, but the trick is to find it rather than, as you say, do the normal BMW process of elimination replacements! That's very low mileage for a vibration damper to go! How long ago was it replaced? Worth a try to get them replace if it was within two years ago - is motorplan still active?
Either way, hope you get this sorted! :thumbs: