Scott, 2008 breather part #11D-E5371-10
2009 breather part #11DE53711000
I don't know who initiated the warranty replacement, there has been no recall, BUT there have been several people on here, including me, that have had it replaced under warranty.
The parts look different as well, the 09 breather has three (I think) snail shaped chambers formed into the breather.
It works.