I think it might depend on what gate as to whether or not the card works through the window. I don't care particularly, but this has been suggested before, and I tried it at the St.James gate when it was first brought up, and it didn't work from inside the window of my 2011 Chrysler 200.
Since it was brought up a second time, I tried it again. Still doesn't work!
I did have to replace two automatic window winders on my XTerra in 5 years (without going though any gates), so I think they can/do wear out.
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