Generator Belt
WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Drive belt deflection/tension inspection is not necessary because of the use of the generator drive belt auto tensioner.
Verify that the drive belt auto tensioner indicator mark does not exceed the limit. See Fig 1 . If it exceeds the limit, replace the drive belt.