A non - exempt diesel - powered motor vehicle may be subject to either the OBDII emissions inspection or the diesel emissions inspection. Additional information about these inspections may be found on the table below. 

Emissions Inspections for Diesel-powered Vehicles 


Vehicles subject to diesel emissions inspection 
All non - exempt diesel - powered vehicles registered in the NYMA or Diesel Emissions Metropolitan Area DEMA some registrations may or may not show they are within DEMA, with a maximum gross weight MGW, as indicated on the vehicle registration certificate, over 8,500 pounds, must get an annual diesel emissions inspection. The diesel emissions inspection must occur at the same time as the annual safety inspection. The DEMA includes the five boroughs of New York City, and Nassau County, Suffolk County, Rockland County, and Westchester County. The model year does not exempt a vehicle from the inspection. Read section 79.2 of the inspection regulations to get information about vehicles that are exempt. All diesel - powered vehicles registered outside of the Diesel Emissions Metropolitan Area DEMA, with a maximum gross weight MGW over 8,500 pounds, do not require an annual diesel emissions inspection, but may be subject to a random roadside diesel emissions inspection. All model year 1997 or newer non - exempt diesel - powered vehicles, registered anywhere in New York State, with a gross vehicle weight rating GVWR less than 8,501 pounds, must get an annual OBDII emissions inspection, and are not subject to the diesel emissions inspection. All model year 1996 or older diesel - powered vehicles, registered anywhere in New York State, with a gross vehicle weight rating GVWR less than 8,501 pounds, are not subject to the OBDII emissions inspection, the low - enhanced emissions inspection, or the diesel emissions inspection. 

Diesel Opacity Emissions 
The Diesel Opacity Emissions inspection is not required in other areas of NY State, or for vehicles register 

user: How do I organise a temporary certificate of emissions waiver?

assistant: Have you an existing diesel emissions inspection certificate that is expired?

user: No, not at the moment

user: Where is a temporary certificate of emissions waiver issued and when is it needed?

assistant: If your existing diesel emissions inspection certificate expires while outside the DEMA, you may apply to the Department of Motor Vehicles for a temporary certificate. This certificate is only available at the DMV Issuing Offices. This temporary certificate allows the vehicle to be operated when displayed on the vehicle

user: What types of vehicles must undergo a diesel emissions inspection?

assistant: All non-exempt vehicles in the NYMA area or DEMA area with an MGW over 8500 pounds must get an annual diesel emissions inspection. This inspection has to occur at th same time as the annual safety inspection. 

user: Can vehicles that are due for a diesel emissions inspection be carried out at a non-diesel emissions inspection station?

assistant: Non-diesel emissions inspection stations cannot inspect vehicles that are due a diesel emissions inspection.

user: What vehicles are subject to the diesel emissions inspection?

assistant: All vehicles from 1996 or older with a GVWR less than 8501 pounds are not subject to the OBDII emissions inspection, low-enhanced emissions inspection or the diesel emissions inspection

user: How does an inspection station become a diesel emissions inspection station?

assistant: The station must prove that it has purchased an approved smokemeter and must send a photocopy of the purchase invoice to the address listed