State Inspection

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All vehicles registered in Massachusetts must receive a safety inspection each year. Vehicles listed below must also receive the following types of emissions tests each year: 

On-Board Diagnostic (OBD) Test:

• Model years 2007 and newer passenger cars, trucks and SUVs
• Model years 2007 and newer light-duty diesel vehicles (with a Gross Vehicle Weight Rating or "GVWR" of 8,500 pounds or less)
• Model years 2007 and newer medium-duty diesel vehicles (with a GVWR of 8,501 to 14,000 pounds)
• Model years 2008 and newer medium-duty non-diesel vehicles (with a GVWR of 8,501 to 14,000 pounds)

Opacity Test:

• Model year 1984 and newer, medium- and heavy-duty diesel vehicles (with a GVWR of 10,001 pounds or more) not equipped with OBD systems

The following types of motor vehicles are exempt from the emissions inspection:

• Cars, trucks and SUVs manufactured before model year 2006 (Note: while these vehicles no longer receive tailpipe emissions tests, if they emit excessive smoke they will fail their safety inspections.)
• Light-duty diesel vehicles (with a GVWR of less than 8,500 pounds) manufactured before model year 2006
• Medium-duty diesel vehicles (with a GVWR of 10,000 pounds or less) either manufactured before model year 2007 or that are 15 years or older (based on model year)
• Medium-duty non-diesel vehicles either manufactured before model year 2008 or 15 years or older (based on model year)
• New vehicles delivered to Massachusetts owners
• Motorcycles and mopeds
• Tactical military vehicles
• Vehicles operated exclusively by electric power

For more information visit: https://www.mass.gov/info-details/vehicle-inspections