I would stay away from the "kits" as they usually put together cheaper parts at a cheaper price. Just replace what you think is need and do a little research as far as quality is concerned. A lot of things like the original hoses even after 200,000 km are less likely to give trouble as some of cheap replacement parts.

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1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)