line on driver side mirror, what the heck is this?

Genuine BMW Mirror Assembly 51-16-7-485-226

Vertical line on the wing mirror : r/BMWi3

Passenger Side mirror Kia Soul Forums :: Kia Soul Owners

Replacement 2010 BMW 328i Kool Vue Mirror. Passenger Side, Paintable

Reflection in the drivers side mirror, Page 2

BMW E46 3-Series Heated Exterior Mirror Right Passenger Shadow Line Imola Red 51167890828

Vertical line on the wing mirror : r/BMWi3

Mazda MX-5 Owner's Manual

Side mirrors question - Rennlist - Porsche Discussion Forums

Vertical line on the wing mirror : r/BMWi3