Hey all, I came across this while doing a search and thought I might share it here on this forum. It contains part #'s, pics, and a how to on changing the idler pulley inexpensively. Now I can only assume that the info is correct as I have not ordered the part yet but will soon as mine is just starting to chirp a bit.

Tensioner Pulley noise easy and cheap fix

hope this helpful to any who may need it...

 

just a follow up... here are the links supplied from torontomazda3.ca

DAYCO Part # 89015

Gates Online Catalog

Gates part# is 38008