Nevada requires an annual Smog Check for vehicles in Clark County (Las Vegas) and Washoe County (Reno/Sparks) - the rest of the state has no emissions program. No safety inspection statewide.
Rules change. Verify the current Nevada requirements with the state DMV or environmental agency before you go. This guide reflects the program as of 2026.
| Item | What the Inspector Checks |
|---|---|
| OBD-II scan (1996+ gas) | Check engine light, codes, readiness monitors. Primary test. |
| Two-Speed Idle (older) | 1967-1995 gas vehicles get a tailpipe test. |
| Diesel testing | Diesel-powered vehicles up to 14,000 lbs are tested. |
| Functional check | MIL bulb check on ignition and after engine start. |
| Visible smoke | Excessive smoke from exhaust or crankcase = fail. |
| No safety check | Nevada does not check brakes, tires, lights, or other safety equipment. |
Active check engine light is one of the top reasons cars fail in this state.
Get a Full Diagnosis →Readiness monitors not ready is one of the top reasons cars fail in this state.
Get a Full Diagnosis →Catalytic converter failure is one of the top reasons cars fail in this state.
Get a Full Diagnosis →Failed evap (P0440/P0455/P0456) is one of the top reasons cars fail in this state.
Get a Full Diagnosis →Heat-damaged O2 sensor is one of the top reasons cars fail in this state.
Get a Full Diagnosis →Excessive smoke is one of the top reasons cars fail in this state.
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Only Clark County (Las Vegas metro) and Washoe County (Reno/Sparks). The rest of Nevada has no emissions program.
$15-$25 depending on the station. State-imposed $6 certificate fee included.
Annual, at registration renewal. New vehicles are exempt for the first 2 model years.
You must repair and retest. Free retest at the same station within 90 days. Repair waivers may apply if you have spent $450+.
Yes. Hybrids with a gas engine are smog-tested like gas vehicles. Battery EVs are exempt.
No, Nevada has no statewide annual safety inspection for personal vehicles.