BMW instructions say to lift only from the diff at the rear, if a central lifting point is required, at least for my 3.0si model. Seems a safe bet that earlier models are similar. Do not contact the diff cover.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue