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I'm thinking of doing this but not sure if I should just replace it or try to fix it. My rear passenger window works on occasion. It would go down but sometimes it doesn't come back up. I would have to fiddle around with it either with the front driver controls or go to that side and try using the button on that side. Sometimes it just doesn't want to come back up then all of a sudden it goes back up.
I tried S51357140590 number on ECS tuning and Tischer BMW but nothing showed up
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