What Causes the Noise When Folding the Rearview Mirror?

[OEvan]

Reasons for noise when folding the rearview mirror are as follows: Insufficient lubrication of the spring: The noise when folding the rearview mirror is generally caused by insufficient lubrication of the internal torsion spring. You can remove the rearview mirror cover, apply lubricant to both ends of the spring, and then manually fold and unfold the mirror to see if the noise disappears. Repeat the process of spraying, folding, and unfolding multiple times until the noise is eliminated. Poor sealing at the mirror transition area: If the noise is a rubbing, buzzing, hissing, or squeaking sound, it is likely due to issues with the sealing components at the mirror transition area. There are two common patterns for these noises: one occurs during hot summer weather, likely due to the expansion of the sealing components from heat combined with insufficient lubrication; the other occurs after rain or car washing, usually because the car is dirty, and rain or washing dislodges small debris that adheres to the mirror base and sealing components.