If you are talking about the axle stub spindle where your half-shaft bolts to yes there are bearings and they can be replaced. I think it's possible to do it in the car but I would pull the gearbox to make it A LOT EASIER. Then I'd check or replace IMS bearing and clutch to make sure that's not the area of concern. You can pull the gearbox with the car on jack stands. One of my older posts shows my car on jack stands with the gearbox removed. It's not that hard but I don't advise this if you have never done this type of work on a cheap car that won't cost you big if you mess up.
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2000 Boxster S
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