mine broke in the winter, it got damned cold, the snow in there froze and broke the plastic when i tried knockin some of the snow out of the fender\flap and it split halfway down, i had em off all winter and i live in a city with lots of construction, nothing like NYC but i havent had any issues other than snow getting up in the fender, i usually run it through a wash every couple weeks or when it gets above freezing to get the salt off, i wouldnt worry about it