Offizieller Kommentar
Hard to tell, but it sorta looks like the stem was bent to one side, which I'm guessing is why it broke. You can try contacting Pioneer DJ technical support in your region to find out if they'll repair it under warranty, but I believe that unfortunately, much like tires on a vehicle, faders are not covered for wear-and-tear or unusual damage.
You can certainly purchase a single replacement fader to do it yourself.

