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On October 1, 2007, the State of New Hampshire transitioned into the final stage of the OBD emission program. All automobiles and light-duty trucks whose model year is 20 years old and newer must now pass an OBD emission system inspection during its inspection period. This helps ensure that the vehicles on the roads in New Hampshire will be running cleanly and efficiently in accordance with the US Environmental Protection Agency regulations and keeping our environment and air quality healthier for us all.
| Safety Result | OBD Result | Sticker Details |
|---|---|---|
| Pass | Pass | Sticker Expires in Birth Month |
| Pass | Reject | Sticker Expires in 60 Days |
| Reject | Pass | No Sticker |
| Reject | Reject | No Sticker |
The windshield stickering process that was implemented in February 2018 now applies to all 20 years old and newer vehicles that require an OBD inspection. Depending on the result of the safety and OBD inspections, a vehicle will receive a sticker that expires in the owner's birth month, or a sticker that expires in 60 days, or no sticker as shown in the above table.
The OBD system test consists of several individual checks. Failing any one of the tests will result in an overall failure of that vehicle for the emission portion of the NHOST inspection.
At the end of an emission test, the OBD inspection machine will print out a Vehicle Inspection Report, or VIR. The station should present this VIR to you as it is designed to let the motorist see the results of the inspection including whether or not the vehicle was passed or rejected. If it was rejected, it will list the reasons why it was rejected. We recommend you keep the VIR in your vehicle as added proof that you have recieved a proper vehicle inspection. Click here for more VIR Details.
If your vehicle was rejected, you will need to have proper repairs made. A diagnostic evaluation is the first step. Be sure that your vehicle is diagnosed and repaired by a qualified OBD trained technician. Generally, people who are qualified to diagnose and repair OBD are ASE L-1 certified. Your vehicle may be eligible for warranty repair under your vehicle emissions warranty or the federal 8/80 warranty. Also, check for recall notices or technical service bulletins prior to authorizing repairs. Consult your vehicle owner's manual or dealer.
If you believe that your vehicle should not have been rejected for the OBD inspection, you may request a Referee Action within 10 days of the failed OBD inspection. Do not have any repairs made to your vehicle prior to contacting the NHOST Helpline. Your inspection results will be evaluated to determine if your vehicle qualifies for Referee Action.
Of all the vehicles on the road today, the vast majority will pass an OBD emission test. If you properly maintain your vehicle on an ongoing basis your vehicle will most likely pass smoothly through that portion of the inspection. But, if you are one of the few whose vehicle has an OBD issue, here is some information about what that means for your annual inspection.
A rejection indicates that a problem exists that could compromise the efficiency and smooth operation of your vehicle. Rejected vehicles must be repaired and pass the inspection before an inspection sticker will be issued. A one time 60-day repair period will be allowed to have necessary diagnostics and repairs performed, and the vehicle re-tested to verify repairs.