How to remove black pillar on outside of door?


Actually, maybe you should just buy the carbon fiber ones!


You have to remove the horizontal trim below the window - carefully lift it up using a plastic wedge. Then remove the two screws. Then rotate the trim out from the rear. The forward edge is a "U" shape that wraps under the rubber window channel. You might have to slip the rubber channel out of it's seat in the door - not a problem because it isn't glued (window down of course).
The pieces are available as separate parts. If you don't want to buy new, check wrecking yards.





