How to Solve Rearview Mirror Squeaking?

[Janelle]

The noise is usually caused by insufficient lubrication of the torsion spring inside the rearview mirror. You can remove the rearview mirror cover and spray some BMW adhesion lubricant on both ends of the spring. Then manually fold and unfold the rearview mirror to see if the squeaking disappears. You can repeat the process of spraying, folding, and unfolding multiple times until the noise is gone. This is likely due to the expansion of sealing components in hot weather combined with insufficient lubrication. This usually happens when the car is dirty, and rain or car washing washes tiny debris onto the rearview mirror base and sealing components.