The windings generate A/C which gets converted to DC with the diodes so phase is meaningless.
Electrons flow from negative to positive and take material with them as they leave which is how cathodic protection (pipe lines, boat motors) works

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1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)