NHTSA Complaint #11508312 — 2018 TESLA MODEL 3

The electrochromic rearview mirror will not significantly darken or dim. There is no way to make the mirror less reflective. The vehicle is designed to automatically simultaneously darken the rearview and sideview mirrors at night. The sideview mirrors darken properly* but the rearview mirror only very slightly changes color and does not noticeably reduce reflected light. This appears to be a manufacturing defect with the mirror. From what I understand about how electrochromic mirrors work, I believe there is likely a slight misalignment within the layers of the mirror that result in the mirror providing less than acceptable contrast. I have another Tesla with the exact same mirror and it works as intended. According to various internet message boards, many Tesla owners have the same and the opposite problem (mirror gets too dark). This would lead me to believe this is due to lack of quality control during the mirrors' manufacture. This lack of functionality requires me to suffer temporary blindness (Troxler Effect) caused by the intense reflection of headlights of the vehicles behind me. My only remedy is to reposition the mirror such that the mirror becomes useless for its intended purpose. This defect has existed since I purchased the vehicle new in September, 2018. There are no warning lamps, messages, or other symptoms associated with the defect. I reported this to Tesla multiple times. Tesla technicians inspected and tested the mirror on at least two separate occasions during daytime hours. Both times the technicians stated that the mirror appeared to work properly but the technicians were unable to replicate the issue because the vehicle will only darken the mirrors after sunset. *This is also problematic because the mirrors should also darken on dark, rainy, overcast days when the vehicles behind me are using their headlights. The vehicle is available for inspection upon request.