As long as the pax side arm is generally the same shape, you should be able to move it. I don't know how your arms are fastened to the wiper shaft, but on my former 2008 Bus mine were held on by a hex nut screwed directly onto the wiper shaft. I had a driver arm on the 08 Bus round out inside in a terrible rain storm in Florida. I ended up putting a 6 point socket on that bolt and tightening it with as much torque as I could apply with a 3/8" ratchet. I 'm not a small guy and am a former farmer and heavy truck mechanic and had no choice. I thought that if I broke the bolt/shaft I'd have to swap the ww drive arm from the pax side to the driver side anyway, so while I got a new wiper arm, a new wiper shaft would not be that much more. Bottom line...After tightening that nut as tight as I could get it, the arm stuck in the correct position. I drove that Bus for additional 2 years without an additional problem. The arm white metal actually deformed into new striations and held fine for the 30,000 or so additional miles I ran before I traded the Bus.
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