'04 has the updated electronics and engine vs '01-'03, which makes adding on electronic mods easier - My vote is for the 4.4, which gives the best mileage for the X5 - the 3.0 works for the X3, not the X5

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Mark _______________________________
2001 X5 4.4i topaz blue/sand Sport, complete Dinan S2 , hitch, V1, tint, BSW Stage 1, Alpine INA-W910BT
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