Some time ago I bought 4.10 diffs from a 2001 3.0. to replace the 3.90s in my 4.6. I haven't made the swap yet but I checked multiple sources that said it is a direct plug and play. I just measured the centerline of 3 of the bolts on the lower part of the cover on both rear diffs. The span is the same. One of those that told me the two diffs are a direct swap was a BMW tech that I trust. There were also a couple of members here that also thought so.

I will be taking the diffs to have them checked over and new seals installed later this week and I can ask the shop if you would like.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas