The Nevada Emissions Control Program aims to reduce air pollution caused by vehicle emissions. If you live in Nevada or recently moved here, getting your car registered might include one important step: an emissions test. It might sound technical, but it’s a simple process that helps keep Nevada’s air clean and your vehicle running safely. Whether you're registering a new car, transferring from another state, or renewing your tags, here's what you need to know.
Do You Need an Emissions Test?
You are required to take an emissions test if both of the following apply to you:
You live in Clark County or Washoe County.
You drive a passenger vehicle, truck, RV, or motorhome.
You are not required to take an emissions test if your vehicle falls into one of these categories:
Your vehicle is from model year 1967 or earlier.
Your vehicle is a diesel vehicle with a weight over 14,001 pounds.
Your vehicle is a motorcycle or moped.
Your vehicle uses alternative fuel.
Your vehicle is registered as a classic, old timer, or replica and is driven less than 5,000 miles per year.
If you live outside Clark or Washoe County, you are automatically exempt from emissions testing requirements.
What If You Just Bought a Car?
If you purchased your vehicle through a private sale, you are responsible for having it tested. The results will be valid for 90 days.
If you purchased your vehicle from a dealer, the dealer will handle the testing. Those results are valid for 180 days.
How Often Will You Need a Test?
You will need an emissions test when you register your vehicle for the first time and at each annual renewal.
The following exemptions apply to new vehicles:
New gas-powered vehicles are exempt for the first three registrations.
New hybrid-electric vehicles are exempt for the first five years.
Moving to Nevada?
If you have moved to Nevada, you must register your vehicle within 30 days. You will also need to complete a Nevada emissions test. Please note that the DMV does not accept out-of-state smog test results.
Where Can You Get an Emissions Test?
There are several DMV-approved testing stations in Clark and Washoe Counties. Visit the DMV licensed businesses page to find an emissions testing station near you, or call one of the DMV Emissions Labs:
Las Vegas: (702) 486-4981
Reno: (775) 684-3580
What Happens During the Test?
Nevada uses two types of emissions tests, depending on your vehicle's model year:
For vehicles from 1996 or newer, a technician will perform an OBDII test by connecting a scanner to your car’s onboard computer to check the emissions system.
For vehicles from 1995 or earlier, a technician will perform a two-speed idle test, where your car is evaluated while idling and again at 2,500 RPM.
Both tests take only a few minutes to complete, and you will receive your results right away.
What If Your Vehicle Fails?
If your car does not pass the emissions test, you will need to make the necessary repairs and return for a retest.
You may qualify for a waiver if:
Your vehicle exceeds allowable limits for carbon monoxide or hydrocarbons (applies to 1968–1995 vehicles and all heavy-duty models).
Your check engine light is illuminated on a 1996 or newer vehicle.
If you are located in Clark County, repairs must be completed at a 2G-licensed shop in order to qualify for a waiver.
You will not qualify for a waiver if:
Your vehicle is emitting visible smoke.
Your vehicle is still under the manufacturer's warranty.
There is evidence of tampering with emissions control devices.
Even If...
Even if you are concerned about the hassle or cost, emissions testing is easier than you might expect. Many common issues are inexpensive to fix, and certified technicians can explain everything you need to know. Plus, passing the test keeps your car running more efficiently and helps protect Nevada’s air quality.
Tips to Help You Pass
Make sure your vehicle is well-maintained throughout the year.
Avoid letting your engine idle for longer than 30 seconds.
Accelerate smoothly and avoid excessive speeding.
Address any illuminated check engine light as soon as it appears.
Still Have Questions?
For the most current information about Nevada emissions testing requirements, visit the Nevada DMV website or call your local DMV office.
Updated 09/16/2025
