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Answered 2011-09-13 17:13:05

Normal. Vehicle leveling syatem.

I just purchased a 98 STS and have heard that same noise.. Happens when the key is first turned on, but continues once car is started. I tracked it down, atleast my noise. Next to the headlight switch there is a really small vent, I am guessing it is for climate control. I put my hand right in front of it and can feel air being sucked in. It sounds like the bearing is shot in mine, it gets quiet after a min or so but can still hear it.

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