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Cars and Light Trucks

Light-Duty Vehicle and Engine Emission Certification

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Search the Document Index System (DIS) database to find:

  • Advisory Circulars
  • Applications for Certification
  • Certificates of Conformity
  • Certificate Summary Information Reports
  • Manufacturer Guidance Letters
  • Verify System Documentation

NOTE: You will need Adobe Acrobat Reader, available as a free download, to view some of the files on this page. See EPA's PDF page to learn more about PDF, and for a link to the free Acrobat Reader.

A comprehensive information source for light-duty vehicle and engine emission certification programs

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