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    BMW X5 Vibration/ booming and harshness

    Hi. I have a 2002 BMW X5 E53 4.4 When accelerating through 2-2.5k rpm the engine /drive train is noticeably harsh and boomy in the cabin. This is also accompanied by a high frequency vibration. If stationary in P or N and the engine is revved there is no vibration or harshness so it is doen...