I don't think the 4.4 ever came with a manual in the X5, even in other markets. You're pretty much stuck with a 3.0 if you want a factory manual in your X5.

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2003 X5 4.6 | 2000 540i Touring

Formerly owned:
2004 Range Rover | 2000 M5 | 2000 540i/6
1995 750il | 2003 Mercedes S500 | 2003 540i/6