Found a great deal on a V8 X5/2001 with 146K miles - but it's a V8 . The owner claims a knocking noise and that it needs an engine. I am wondering if I can swap in a I6 /330 engine instead. I imagine I have to do some small mods like exhaust manifolds and engine mounts. But what about the transmission? Any particulars with the EMC or other computer systems? Thanks in advance.

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X5 3.0 AUTO -2001 - 238,000 miles