Driving slowly, straight ahead, city street, right passenger mirror exploded with a big bang. looking inside, plastic linkages that link the mirror to the adjustment motor assembly were broken. lane assist leds continued to work but the mirror, hanging loose from its shroud, was useless. i hadn't adjusted the mirror in months.. car was 1 month out of warranty - parts and labor to replace ~$400. googling i discovered i'm not the first person to have this problem.