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not necessarily turbo

  1. Loud internal whistle during acceleration (not normal turbo sound)

    1.8 Liter Turbo
    Hello, I was unable to find a thread that had this particular issue so I apologize if this has been answered before. I have a 2002 1.8L beetle. It has started to develop a loud whistle that almost sounds like the "all aboard" whistle that sea captains use. This is not the typical sound of the...