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Hello, when you try to fold and unfold the mirror does it make any sound at all such as a popping or do you hear the motor the motor inside the mirror spinning at all?
I hate to be the bearer of bad news, what you are describing sounds like the gearing on it has broken (for it to be loose like that). Unfortunately the mirror has to be replaced as an assembly, its not something that you can buy individual parts for. I would say, replace the mirror and you should be good shape.
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