I had this same problem. It took me two different shops, the later having a roadforce wheel balancer. They resoved my problem by finding two bent wheels that were not identified by the first"inexperienced" tire shop. Give this a check at a place with the premium wheel balancing machines. When the x is lifted up take a quick look at the flexdisc and look for tears, but it's prob not that. Good luck

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2001 X5 4.4i WHITE-Loaded like a baby's diaper SOLD