From memory, the very early cars has slightly smaller diameter front axles, along with different front wheel bearings, CVs etc. so it's possible that parts for the later cars won't fit (almost certain in fact).

Best bet is you use your VIN at RealOEM and determine the exact parts you need.

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Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)