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Required in some areasSources checked Oct 6, 2026

Maine emissions testing rules

Maine adds an emissions check to the safety inspection only for gasoline vehicles registered in Cumberland County. Vehicles from 1996 and newer get an on-board diagnostics test, and a failed OBD test must be repaired before the inspection sticker is issued.

Program changes

The enhanced program has been in effect since January 1, 1999, under 29-A MRSA §1751.

“The enhanced motor vehicles inspection program under 29-A MRSA§1751 went into effect January 1, 1999.”

Where testing is required

All gasoline-powered vehicles registered in Cumberland County must get the enhanced inspection.

“The program requires that all gasoline-powered motor vehicles registered in Cumberland County be subjected to an enhanced inspection.”

What the test checks

1996 and newer vehicles get an on-board diagnostics (OBD) inspection, added in January 2000; a gas cap pressure test was added in January 1999.

“Starting in January 2000 an Onboard Diagnostics (OBD) inspection for 1996 and newer vehicles was added to the inspection.”

  • “In January 1999, a gas cap pressure test was added for 1974 and new vehicles.”

Registration and enforcement

Since January 2001, a vehicle that fails the OBD part must be repaired before it receives a safety inspection sticker.

“In January 2001, vehicles failing the OBD portion of the inspection were required to make necessary repairs prior to receiving a safety inspection sticker.”

Maine emissions testing questions

Does Maine require emissions testing?

Yes. Required in some areas. All gasoline-powered vehicles registered in Cumberland County must get the enhanced inspection.

Sources

Every quotation above is checked word for word against our saved copy of the page, on the date shown. Rules change; if a page has moved or says something different, tell us at the corrections page.