I have a 2007 BX24... basically same tractor as yours.
I have some scuffs & scratches but nothing cracked or broken... have torn the lenses off the hazard flashers a few times by catching on brush, etc. but they didn't break.
I do keep my tractor in the barn... maybe continuous sun & weather exposure makes the plastic more brittle ?? I can't imagine what I would have to hit my tractor with to break the hood or fender.
Pete
I keep my tractor in a garage unless i am using it. On the rare occasion that I must leave it out side it is covered with a tarp when not in use.