One problem related to engine belts and pulleys has been reported for the 2002 Mazda Protege 5. The most recently reported issues are listed below.
I have been working on this car for maybe 2 years and the last few months it has been misfiring on cylinder 3. It seems that many other people have had this problem but cant seem to figure it out. I have replaced everything that had to do with electrical and now I think it might be something to do with the fuel injectors. Also the seat belt would stay locked for about 10 minutes or so.