Re ebay kit sold for 17 Euros, I am surprised they include the bearings and slip ring and all that stuff for that price.
A good bearing alone is $20.
Anyway, when you get the bearings, please post.

I think you are better off with the factory bearings b/c they last past 200K miles. They are usually Koyo or Nachi type.

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1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT