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small circular object on headliner

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99K views 26 replies 20 participants last post by  matthewartis01  
#1 ·
Does anyone know what that small speaker looking thing about the size of a half dollar on the drivers side roof inside does? Thanks
 
Discussion starter · #13 ·
@grim jeeper, that is exactly what I was talking about. thanks for the details. I am not sure my auto inside temp is working right since the body shop took my headliner off to replace my roof.