Last Updated 25th of May, 2010

Can diesel powered vehicles undergo emissions testing at any smog check station?

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Diesel Inspection and Vehicle Registration

Currently only New York, Colorado, California, and Nevada require emissions testing for diesel-powered vehicles. Respective testing guidelines are as follows:

Colorado


Air Care Colorado, the program that manages Colorado's smog check program, does not test diesel-powered vehicles. This is instead handled by independent, state-sanctioned emissions testing stations.

Currently only the following counties require diesel vehicles to pass a smog inspection: Boulder, Jefferson, Broomfield, Denver, Douglas and partial portions of Adams, Arapahoe, Larimer, Weld, and El Paso.  

California


Because testing for diesel-powered vehicles is relatively new (IT went into effect January 2010), the Bureau of Automotive Repair (BAR) will not be pointing diesel vehicles to Test-Only or Gold Shield stations for the initial couple years of the program.

Under the new rule diesel vehicles manufactured prior to 1998 or with a gross vehicle weight are exempt.

New York


Diesel-powered vehicles can test at any DMV-licensed inspection state. Keep in mind that only diesel-powered vehicles registered in the New York City Metropolitan Area (NYCMA) with a maximum gross weight of 8,501 pounds or heavier require inspection. Vehicles registered outside of the NYMCA are exempt.

Nevada


You must test at a designated light-duty diesel emissions inspection station. There are five in Reno and nine in the Las Vegas area. You can find a listing of these inspection stations on the Nevada DMV website.

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