Can't say for sure but the shape may be a bit different between front and rear carriers. The carrier fits snug to the door skin so if the profile of the skin is different on each door - the carrier shape would also be different. Different part numbers would suggest they are not the same.

Only one way for you to find out for sure.....

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Cheers, Brian

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2001 X5 4.4i Sport
Black Sapphire, Hi Gloss Shadowline, Full Privacy Glass.
Too Cool for Jack Bauer