Emissions Test in Las Vegas

Owning a car entails a ton of responsibilities and frequently stretches your budget. The same goes for yearly vehicle registrations and getting an emissions test. You can be better prepared for your subsequent trip to the emissions testing facility by being aware of the requirements your vehicle must meet, including any exemptions, and the significance of smog testing.

What You Must Understand

Smog tests and emissions tests examine the quantities of dangerous substances produced and released by combustion engines. By reducing the amount of pollutants your car produces while driving, emissions testing assist to enhance the quality of the air. Such contaminants are detrimental to both people and animals as well as the environment.

In the state of Nevada, most original vehicle registrations as well as yearly renewals are subject to emission inspection requirements if the vehicle is situated inside the densely populated and urban counties of Clark and Washoe. Your mailed renewal will specify when it’s time to test your car if one is due.

If a vehicle is gas-powered, diesel-powered (up to 14,000 pounds), was manufactured in 1968 or later, or is a newer vehicle on its third registration, it must undergo emission testing. Hybrids are exempt for five years.


There are some automobiles that are exempt from emissions testing, including:

  • On their initial or second registration, new automobiles.
  • For the first five years, a brand-new hybrid-electric vehicle.
  • manufactured before 1967.
  • Mopeds or motorcycles.
  • Vehicles in Nevada’s remote counties, including some regions of Clark and Washoe. Check out these test locations.
  • cars using alternative fuels.
  • vehicles with a Classic Rod, Classic Vehicle, or Old Timer registration and annual mileage limits of 5,000 miles or less.
  • vehicles that are registered as replicas.
  • over 14,000-pound diesel automobiles.
  • 90 days before a transfer of ownership, registration, and/or testing.


Only specially trained, licensed emission stations are permitted to conduct tests. For testing, you’ll need to provide your vehicle’s registration, evidence of insurance, and money (fees may vary).

An on-board diagnostics test will be performed on all vehicles produced in 1996 or later. In order to examine data from the vehicle’s emissions system during this test, the technician will connect a piece of testing equipment to the OBD computer in the automobile. Reminder: If the battery has been disconnected in a 1996 model or later vehicle for whatever reason, do not conduct an emissions test right away. Driving the car for up to a week is highly advised to allow the OBD system to reset correctly. A failed smog check will come from testing too soon. Smoke-emitting vehicles fail the emissions inspection and are not eligible for a waiver. Police may issue tickets to cars that emit visible smoke.

A Two-Speed Idle Smog test will be performed on vehicles produced before 1996. The engine will first be tested at idle speed before being tested again at 2,500 RPMs. On older diesel engine models, a dynamometer will be employed.

You’ll receive a Vehicle Inspection Report for your records once you pass. The DMV will receive an electronic report of your test results as well. The validity of tests is 90 days.

Testing Fails

You must take your car to a licensed facility to have repairs made if it fails the emissions test, and then you must take the test again. A waiver could be given if the car fails the second test. For all heavy-duty vehicles and all light-duty cars from 1968 to 1995, the vehicle must fail the test for carbon monoxide or hydrocarbon levels that are higher than the established criteria. Or the “Check Engine” light that appears on light-duty vehicles built after 1996. Automobiles with warranty coverage, vehicles that smoke, or vehicles with tampered emission devices are not eligible for waivers.

Return to a DMV Emissions Test Facility with your vehicle, failed certificates, and receipts for all repair work if the vehicle fails yet again due to hydrocarbons/carbon monoxide or the Check Engine light after repairs are finished and all financial requirements established by the Nevada DMV to obtain a waiver have been met.

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There is extremely little probability that your car will pass the emissions test if the check engine light is on. Have peace of mind knowing Quality Star Imports gave your automobile the greatest maintenance before your upcoming emissions test! Call us right away!