Here is a link to an article on Edmunds.com: http://www.edmunds.com/reviews/list/top10/55745/article.html
There is the following blurb about the MP3:
"There are a few notable omissions here, and this is by design. For instance, you won't find the Mazda Proteg MP3 system on our list. Why not? Simple: The Mazda MP3 was a 2001 model, with no replacement in the 2002 model year list. We'd rather deal in current models that you can go out and purchase today."
There is the following blurb about the MP3:
"There are a few notable omissions here, and this is by design. For instance, you won't find the Mazda Proteg MP3 system on our list. Why not? Simple: The Mazda MP3 was a 2001 model, with no replacement in the 2002 model year list. We'd rather deal in current models that you can go out and purchase today."