is this shaft seal on the front in relation to a valvetronic problem causing the vibration? Mine started idling a bit rough and my mech said he's seen a rash of 5 people over last 2 months come in with exact same problem I'm finding with my x5. cel showa no exact problem, just "misfire" on cyl 6, 7 & 8.

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I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

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'91 850i
'05 X5 4.4i
'09 Clubman S