I'm surprised folks are saying X5 parts in short supply. Yes, some body parts are difficult to come by such as towing kit, 4.8is body kit, OEM head unit etc. But wear and tear items are always available, even for my old 1997 528 E39. I've never failed to find OEM or otherwise maintenance parts.

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'05 E53 X5 4.4i, '97 E39 528, '07 E92 335i, '16 F86 X6M.