Smog rules by vehicle type

Two things move a vehicle off the ordinary path: its weight class or fuel changes the test method, or it appears on the DMV's exempt list. Here is the one-line rule for each type, with the full page a click away.

The seven rules in one line each

Motorhomes and RVs: gasoline coaches are tested at any weight, with the two-speed tailpipe test; diesel coaches over 14,000 pounds GVWR are exempt from the yearly test.

Motorcycles and mopeds: on the DMV exempt list by name.

Heavy-duty gas trucks: 8,501 pounds and up is heavy duty, tested every year with the two-speed tailpipe method.

Pickup trucks and vans: the 8,500 pound line decides the OBD plug-in test or the tailpipe test, and diesel pickups up to 14,000 pounds GVWR test too.

Leased vehicles: tested every year like any car; a transfer between leasing companies with no change of lessee or operator is exempt (NRS 445B.800).

Replica vehicles: Replica Vehicle registrations are on the exempt list.

Propane and natural gas vehicles: vehicles running permanently on propane, CNG, methane or butane are exempt.

Large vehicles at the Reno locations

For a motorhome, a large truck or a diesel, call the service center before you bring it: Reno Northwest (775) 787-1000 or Reno South (775) 828-6996. Diesels, hybrids, classics, fleets and new cars have their own situation pages, linked below.