Excellent DIY and you couldn't have posted it at better time for me. I to have the same tranny in an '03 325i and have been trying to decide what fluid to use for the change. It's not a cost issue with me, I just want to use the right fluid. I have so far been unable to find the original fluid anywhere. Tischer BMW lists the new part number (83220397114) that has apparently superseded 83220024359, but that is Dexron VI, not the original fluid. I don't have anyway of removing all of it, so I'd prefer to go back with exactly what's in it. Does anyone have an online source for the 83220024359 fluid?