Beginning in 2004, Ford dropped the old 4-cylinder Zetec engines in favor of Mazda's MZR design. Thus, 2005 and present Duratec 4-cylinder engines are Mazdas.

The engine is currently built by Ford in Chihuahua, Mexico; Dearborn, Michigan; Valencia, Spain; Laguna, Philippines; and Nanjing, China.

The Duratec is the replacement engine of the older Zetec, but on closer inspection you notice that the two are nothing alike! The Duratec belongs to the '14 family' as found in twin-cam Sierras and Mk5 Escort RS2000 as a 16-valver. However it doesn't have a lot in common with thos either. The only aspect they share is chain-driven camshafts.

Hope this info answers your question.

Cheers.