I have a 99 Mystique with the Zetec. I had a rubbing scraping sound with only 29k miles. I pulled the top cover and found the belt to be ridding right on the edge of the pulleys and to be chewed up. Ford fixed it under warrenty. They replaced the tensioner.
....Brad

Aviation Electronic Tech's RULE!!
Your born you die
inbetween you work on cars
how can we be so lucky.
99'Mystique Zetec VCT ATX
"CEG" on front and back windows.
10 inch HED series Cerwin-Vega
My ther car is a 1996 4Runner
Sunfire red pearl
with Bilstein shocks, K&N air filter
and Xenon fender flairs
"There is always room for more mods"