Ours is a 3.0d pre-LCI, basically the rear diff just went busted completely. It was not driveable as the rear wheels would lock up without the diff.

No apparent symptoms before it failed, the diff just snapped out of the blue. It was like a ticking bomb waiting to explode.

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'07 X5 3.0d - Black Sapphire Metallic / Camel interior
Specs: Sport pack, Executive, 7 Seats, OEM 336, Hifi
Mods: Aero Kits, Titanium grilles, 4.8i exhaust, Tinted, ///M Footrest, OEM Sport pedals, OEM Rubber mats, OEM Sunshades, LCI Taillights