In New Hampshire, a vehicle emissions OBD test is required for many original registrations, as well as for annual registration renewals. Inspection stickers indicate by what date an emissions test must be completed.
VEHICLES THAT REQUIRE AN EMISSIONS TEST
A car, truck, motor home or RV (recreational vehicle) requires an OBD emissions test when:
It is a 1996 model or newer.
It runs on gasoline.
It is a 1997 model or newer, runs on diesel fuel, and has a manufacturer’s gross vehicle weight rating of up to 8500 lbs.
Emission tests are valid for12 months. A valid test is required to complete an original vehicle registration or registration renewal. Used car dealers are required to issue a valid emissions test for any vehicle they sell. Getting an emissions test is the buyer’s responsibility when the vehicle is purchased from a private owner.
A vehicle is exempt from emissions testing when it is a 1995 model or older.