Yikes. That is a surprise to me. So, don't use xDrive badges to tell the difference...

As my penance, I flipped through parts diagrams for different months on realoem, and they show some cars as early as 02/2003 with the xDrive transfer case. So, some 2003 might have it, later in the year is more of a sure thing. 01/2003 and earlier (according to realOEM diagrams), will not have the xDrive transfer case.

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David.X5
2001 X5 4.4i Sport
SOLD! at 160k miles