are you talking about the front or back?
the back bearings are a non serviceable part, the in order to change the bearings u need to change the hub,
the front bearings can be separated, but chances are if you have to change your hub, bearings will have to be changed also, you will damage the bearings trying to remove them and put them back in,
so my answer is yes. get the parts yourself from ecstuning.com and you will save alot of money over dealer or most shops.