Usually there is no actual need to renew shaft seals or support bearing if they are not clearly worn or seals damaged while removing/installing the shafts.

What model/year are we talking about? Basic or M-sport suspension?

__________________
E39 530dA -02 M-Sport Messing metallic
E53 X5 3.0dA -06 Sport Stratus grey
E70 X5 40d -12 M-Sport Space grey