I too did not know why they were going to be replaced but then I am only a "gentlewoman". I posted a message here but really didn't get more info. So since it was under warranty, I went ahead and had them changed.
I am very close to having the warranty expire. Before then I plan on taking it to an independent and have him go over it from top to bottom and then will take it to the dealership. I do plan on geting extended warranty but want to make sure we have everything covered or taken care of before then.
Thanks all for the advise and comments. Much appreciated.