Guide Updated 2026-10-30
Nevada smog check basics for Las Vegas and Reno
Nevada requires an annual emissions test only in urban Clark County (Las Vegas) and Washoe County (Reno). The 2026 fee caps are $75.50 and $71.50, and a pass is good for 90 days.
Do you need a smog check in Nevada
You need a Nevada emissions test only if your vehicle is based in the urban parts of Clark County or Washoe County. Clark County includes Las Vegas. Washoe County includes Reno and Sparks. Nevada calls the test an emissions test and most people say smog check.
If you live elsewhere in Nevada, you do not need one. Vehicles based in remote areas of Clark and Washoe counties are exempt too. The state runs the program through the Nevada DMV, and the rules are quite different from California's.
- Model year 1968 and newer gasoline vehicles of any weight need a test.
- Diesel vehicles from 1968 on need a test if they weigh 14,000 pounds or less.
- The test is every year, not every other year.
- A passing result is good for 90 days.
Nevada will not issue your registration until a qualifying vehicle passes. Call the Nevada DMV Emission Control Program in Las Vegas at (702) 486-4981 or in Reno at (775) 684-3580 if you are unsure about your address.
Which vehicles are exempt in Nevada
These vehicles do not need a test.
- Vehicles on their first three registrations, since new vehicles are exempt until the fourth registration
- New hybrid electric vehicles for the first five model years, so the test starts in the sixth model year
- Model year 1967 and older
- Motorcycles and mopeds
- Electric vehicles
- Vehicles that run only on propane, compressed natural gas, methane or butane
- Diesel vehicles of 14,001 pounds and up
- Transfers between husband and wife
- Transfers where a passing test is less than 90 days old, or 180 days on a Nevada dealer sale
- Classic rod, classic vehicle and old timer plates, if driven 5,000 miles a year or less
- Replica vehicles
- Fleet vehicles in the Continuous Monitoring Program
The classic car break has paperwork. You file an odometer certification each year and you must carry classic car insurance. If you go over the mileage you have to get a test and change your plates.
New cars and hybrids in Nevada
Nevada does not count model years the way California does. A new car is exempt until its fourth registration. Since registration is yearly, that means the first test comes in about the fourth year. California gives an eight model year break on renewal, but only a four model year break on a sale.
Hybrids get a separate rule. A new hybrid is exempt for five model years and needs a test in the sixth. In California, hybrids follow the same rules as gas cars.
How much does a Nevada emissions test cost
Nevada sets a ceiling on what stations can charge. The state surveys station labor rates each year and publishes new limits. The 2026 limits for a light duty gas car are $75.50 in Clark County and $71.50 in Washoe County. That includes a $7 state certificate fee. Stations may charge less and many do.
Highest legal Nevada emission test price in 2026
| Vehicle | County | Test fee | Certificate fee | Highest total |
|---|---|---|---|---|
| Light duty gas | Clark | $68.50 | $7.00 | $75.50 |
| Heavy duty gas | Clark | $68.00 | $7.00 | $75.00 |
| Diesel | Clark | $83.00 | $7.00 | $90.00 |
| Light duty gas | Washoe | $64.50 | $7.00 | $71.50 |
| Heavy duty gas | Washoe | $66.00 | $7.00 | $73.00 |
| Diesel | Washoe | $67.00 | $7.00 | $74.00 |
Compare that with California. The average price BAR reports for 2025 is $67.20, and the $8.25 certificate fee is extra on a pass. That puts a typical California cost near $75.45. The Nevada number is a ceiling, not an average, so the two are not the same measure. Still, the two states end up close.
What the Nevada test checks
- 1996 and newer light duty gas. The inspector scans the onboard computer, called OBD II. A lit check engine light fails.
- 1968 to 1995 light duty gas. These get the two speed idle test, which measures exhaust at the tailpipe. All heavy duty gas vehicles from 1968 on get this test too.
- Visual checks. Cars from 1981 on are checked for tampering with the catalytic converter, air injection, EGR valve, fuel inlet restrictor and gas cap. Older cars get a gas cap check.
- Visible smoke. All vehicles from 1968 on are checked for smoke and crankcase blowby.
- Diesel. Light duty diesels are tested for exhaust opacity on a dynamometer.
Check your gas cap first. A loose cap is a common cause when the light comes on. A flashing check engine light means a serious problem, so pull over and stop driving.
After a repair or a battery change, do not rush to the test. Nevada may show the result as rejected. Rejected is not the same as failed. It means the computer is not ready. Vehicles from 1996 and newer may need up to a week of mixed driving for the OBD system to finish its checks. California gives a longer window of one to two weeks.
Nevada smog check by the numbers
Nevada tested 1,511,884 light duty gas vehicles in 2024 and 2.26 percent failed the first test. In California the first test fail rate was 8.5 percent in 2025. The two states use different standards and test different groups of cars, so the rates are not a direct match.
| Measure | Number |
|---|---|
| Light duty gas first tests, 2024 | 1,511,884 |
| Passed first test | 1,477,769 |
| Failed first test | 34,115 |
| First test fail rate | 2.26 percent |
| Retests | 20,453 |
| Retest fail rate | 14.51 percent |
| Fail rate, model years 1968 to 1995 | 13.46 percent |
| Fail rate, model years 1996 and newer | 2.06 percent |
| Light duty waivers issued | 3,498 |
| Reported smoking vehicles | 4,548 |
| Evader cases | 122 |
Nevada first tests by county, 2024
The retest fail rate in Nevada is much higher, at 14.51 percent, because those vehicles already failed once. Older vehicles fail far more than newer ones. Vehicles from 1968 to 1995 failed 13.46 percent of first tests. Vehicles from 1996 on failed 2.06 percent. In California, the 2000 and newer group failed 7.8 percent and 1999 and older failed 17.9 percent in 2025. The two states use different standards, so do not compare them one to one.
Nevada first test fail rate by model year, 2024
The chart shows the usual pattern. The older the model year, the more likely a fail. Newer model years fail well under 1 percent.
Behind the tests are about 175 test only stations, called 1G stations, and 232 test and repair stations, called 2G stations. Nevada also had 26 government fleet stations and 3 DMV referee stations. The state licensed 1,353 inspectors in 2024. About 450 stations were open in a typical month, most of them in Clark County.
What to do if your vehicle fails in Nevada
A failed vehicle must be repaired and pass a second test before the DMV will register it. If it still fails, you may qualify for a waiver. Do not skip the test just because the light is on. A failing test is the first step toward a waiver.
The vehicle must fail for exhaust levels of carbon monoxide or hydrocarbons, or for a lit check engine light on a 1996 or newer light duty vehicle. You must also spend a set amount on repairs. The amount depends on the county and who does the work.
| Where and who repairs | Spend at least | Needs |
|---|---|---|
| Clark County, repaired at a 2G station | $450 | Receipts from the station for parts or labor tied to the failure |
| Washoe County, repaired at a 2G station | $200 | Station receipts for parts or labor tied to the failure |
| Washoe County, repaired by the owner | $200 on parts | Parts bought within 14 days after the first test |
| Diesel, repaired at a shop | $750 | Receipts dated within 14 days after the first failed test |
| Diesel, repaired by the owner | $500 on parts | Parts only, dated within 14 days after the first failed test |
Some things block a waiver. A vehicle that is eligible for warranty coverage does not get one. A smoking vehicle does not get one and must be fixed at any cost. A vehicle with removed or changed emissions parts does not get one either. In Clark County, repairs at a shop that is not a 2G station do not count, regardless of cost. The waiver lasts one year, and the vehicle must be repaired before the next registration year.
Nevada issued 3,498 light duty waivers in 2024, which was about 10 percent as many as initial failures. Most were in Clark County, where 2,814 waivers went to cars repaired at a shop. See how California handles the same problem in the repair cost waiver guide.
Clark County also runs the Smog Free Clark County voucher program. The Clark County Division of Air Quality pays up to $975 for emissions repairs on 1968 to 1999 vehicles when the owner meets income limits. If your registration is about to expire, you can ask the DMV for a movement permit that lets you drive legally.
Buying, selling and dealers
A Nevada used car dealer must provide a valid passing emissions test with any vehicle it sells that will be registered in Clark or Washoe county. In a private sale the test is the buyer's responsibility. The usual validity is 90 days, and 180 days when a Nevada dealer sells the car. Transfers between husband and wife and transfers within the validity window do not need a new test.
Smoking vehicles and fraud
A vehicle that emits visible smoke cannot pass and cannot get a waiver. Nevada runs a Smog Spotter program where anyone can report a smoking vehicle at SmogSpotter.com or by phone. In 2024 people reported 4,548 vehicles and the DMV sent 2,600 advisory letters. Owners who ignore a letter can have their registration cancelled or put on hold.
Nevada also hunts for emission evaders, owners who register a vehicle outside the program area to avoid testing. It opened 122 cases in 2024 and fined owners a total of $17,250.
Moving from California to Nevada
- Check your address. Only urban Clark and Washoe addresses need the test.
- Check your vehicle. Gas 1968 and newer, diesel 1968 and newer up to 14,000 pounds. Hybrids and new cars may be exempt.
- Fix the check engine light first. It is the most common reason to fail.
- Find a station with the Nevada DMV online station search and compare prices. The fee is capped but not fixed.
- Test within 90 days of when you need to register.
- Plan for every year. Unlike California, Nevada tests annually.
If you still own a California registered car, California rules apply to it. See California smog check by the numbers for the other side of the comparison.
| Topic | California | Nevada |
|---|---|---|
| Where | Most of the state, 40 counties in whole or part | Urban Clark and Washoe counties only |
| How often | Every two years in most areas | Every year |
| Oldest gas model year tested | 1976 | 1968 |
| Oldest diesel model year tested | 1998 | 1968, up to 14,000 pounds |
| New car break | Eight model years, four for sales | Exempt until the fourth registration |
| Hybrids | Same rules as gas cars | Exempt for five model years |
| Test good for | 90 days | 90 days, 180 days for Nevada dealers |
| Newer car test | OBD scan, no probe | OBD scan for 1996 and newer light duty gas |
| Waiver spending | $650 | $450 in Clark, $200 in Washoe, for gas cars |
| Waiver length | Up to two years | One year |
| Typical price | $67.20 average plus $8.25 certificate | Up to $75.50 Clark and $71.50 Washoe |
| First test fail rate | 8.5 percent in 2025 | 2.26 percent in 2024 |
Questions people ask
Who needs a smog check in Las Vegas?
Gasoline vehicles from model year 1968 on, and diesels from 1968 on that weigh 14,000 pounds or less, based in the urban area of Clark County. New vehicles are exempt until their fourth registration, and new hybrids are exempt for five model years.
How long is a Nevada smog check good for?
90 days. A test from a Nevada dealer sale is good for 180 days.
How much is a smog check in Las Vegas or Reno?
The highest legal price for a light duty gas car in 2026 is $75.50 in Clark County and $71.50 in Washoe County. That includes a $7 certificate fee. Stations may charge less. Diesel caps are $90 in Clark and $74 in Washoe.
Does Nevada require a smog check every year?
Yes. Nevada tests qualifying vehicles every year. California tests most vehicles every two years.
Does Nevada have a repair cost waiver?
Yes. For gas cars in Clark County you must spend at least $450 at a 2G station. In Washoe County it is $200 at a station or $200 on parts if you repair it yourself. A waiver lasts one year, and it is not available for smoking vehicles, tampered vehicles or warranty covered vehicles.
What does rejected mean on a Nevada emissions test?
Rejected is not the same as failed. It means the vehicle is not ready to be tested, often after a repair or battery change. Drive for up to a week so the OBD system can finish its checks, then test again.
Do hybrids need a smog check in Nevada?
Not at first. New hybrid electric vehicles are exempt for five model years and need a test in the sixth.
Do classic cars need an emissions test in Nevada?
Vehicles with classic vehicle, classic rod or old timer plates that are driven 5,000 miles a year or less can be exempt. You file an odometer certificate each year and carry classic car insurance.
Is Nevada stricter than California?
Nevada tests every year, but only in two urban areas, and its first test fail rate was 2.26 percent in 2024 against 8.5 percent in California in 2025. The standards and test methods differ, so the two numbers are not a direct match.