Gasoline-Fueled Motor Vehicle Inspection and Maintenance

The Federal Clean Air Act (CAA) of 1990 required New Jersey to establish the Enhanced Motor Vehicle Inspection and Maintenance Program (I/M) to ensure regular monitoring of gasoline fueled motor vehicle emissions by requiring that vehicles undergo periodic emissions testing.  This emissions testing ensures that vehicles are well maintained and operating as designed and do not exceed established pollutant limits. Our goal is to implement an Enhanced I/M program in accordance with the State Implementation Plan that reduces ozone precursors, particulates and air toxics. This program also reduces carbon dioxide through improved fuel efficiency.

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Diesel-Fueled Motor Vehicle Inspection and Maintenance

The Diesel Inspection and Maintenance unit administers the Heavy Duty Diesel Inspection and Maintenance (HDDVIP) program, which was one of the first programs in the country. Established by law in 1995, the Diesel Inspection and Maintenance (I/M) program requires that all heavy-duty diesel powered motor vehicles (HDDVs) with a manufacturers gross vehicle weight rating (GVWR) of 18,000 pounds or more be annually inspected by one of the 300 licensed diesel Private Inspection Facilities (PIFs) throughout the state. The GVWR may be different from the vehicles' registered weight. All diesel-powered trucks, commercial buses and school buses including private and government vehicles are subject to regulation. Emergency vehicles such as ambulances and fire trucks are exempted.

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