That tray would not fit in my X5 - my 17" full-size spare has a large central "stand-off" that holds up the centre of the cargo floor - part #9 in this diagram.

RealOEM.com - Online BMW Parts Catalog

Unless I cut a hole in the centre, about 50mm (2").

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