What Utah requires for vehicle safety and emissions testing
Utah requires most vehicles to pass both a safety inspection and an emissions test before you can register them. The safety inspection checks your brakes, lights, steering, and other systems that affect whether your vehicle is roadworthy. The emissions test measures what comes out of your tailpipe to make sure your vehicle meets air quality standards.
You need to pass both tests before you can renew your registration or register a vehicle for the first time in Utah. The state does not do these tests itself — instead, it licenses private inspection stations to perform them. You choose which station to visit, and you pay a fee at that station.
Not every vehicle needs both tests. Vehicles that are very new, very old, or used only off-road may be exempt from emissions testing. Diesel vehicles have different requirements than gasoline vehicles. The rules also depend on which county you live in, because some counties have stricter air quality standards than others.
Key Takeaways
- Utah requires both a safety inspection and an emissions test before you can register or renew registration for most vehicles.
- Private inspection stations licensed by the state perform the tests, not a government office, and you choose which station to visit.
- The safety inspection checks brakes, lights, and steering; the emissions test measures tailpipe output.
- Vehicles registered in certain counties, very new vehicles, and some older vehicles may have different or no emissions testing requirements.
- You must pass both tests before the state will issue or renew your registration.
Where to find an inspection station in Utah
The Utah Division of Air Quality maintains a list of licensed inspection stations on its website. You can search by county or city to find stations near you. Each station sets its own hours, so call ahead before you go.
Any licensed station can perform both the safety inspection and the emissions test. You do not have to go to two different places. Some stations are run by repair shops, some by tire shops, and some are standalone inspection-only businesses. The state does not require you to use a particular station, so you can choose based on location, hours, or price.
Inspection stations charge a fee for each test. The state sets a maximum fee, but individual stations may charge less. Call ahead to ask what they charge for both tests combined, since prices vary.
What happens during the safety inspection
The safety inspection takes about 15 to 30 minutes. The inspector checks your brakes, including brake fluid condition and brake pad thickness. They test your lights — headlights, taillights, brake lights, and turn signals. They inspect your steering, suspension, tires, and windshield wipers. They also check that your horn works and that your mirrors are in place.
The inspector will look for rust or damage that makes the vehicle unsafe. They check that your seatbelts work and that your vehicle has a functioning spare tire or tire repair kit. If your vehicle has air brakes, they test those separately.
If your vehicle fails any part of the safety inspection, the station will tell you what needs to be fixed. You then have the option to repair it yourself, take it to a repair shop, or have the inspection station fix it. Once repairs are done, you can return to any licensed station for a retest.
What happens during the emissions test
The emissions test measures the gases coming from your tailpipe. For most gasoline vehicles, the inspector connects a probe to your tailpipe and reads the levels of carbon monoxide, carbon dioxide, and other pollutants. The test takes a few minutes and does not damage your vehicle.
For diesel vehicles, the test is different — the inspector performs a visual smoke test and may check the engine's diagnostic system. Hybrid and electric vehicles have their own testing procedures.
Your vehicle passes if the emissions are below the limits set by Utah law. The limits depend on your vehicle's model year and engine type. Newer vehicles generally have stricter limits because they have better pollution control systems.
If your vehicle fails the emissions test, you will need to have it repaired before you can retest. Common reasons for failure include a faulty oxygen sensor, a problem with the catalytic converter, or an engine that is running too rich (burning too much fuel). A repair shop can diagnose the problem using your vehicle's onboard diagnostic system.
Which vehicles are exempt from emissions testing
Vehicles registered in rural counties with lower air quality concerns may not need emissions testing. Check with your county clerk's office or the Division of Air Quality to learn about your county requires emissions testing.
Vehicles that are model year 1975 or older are typically exempt from emissions testing in most Utah counties. Some counties exempt vehicles older than a certain year — ask your inspection station or county clerk what the cutoff is in your area.
Vehicles registered as off-road only do not need either test. If you register your vehicle for on-road use, you must pass both tests.
New vehicles with a current manufacturer's warranty may be exempt from emissions testing for the first few years. Check your vehicle's documentation or ask the inspection station whether your vehicle qualifies.
How to prepare your vehicle for testing
Before you go to the inspection station, make sure your vehicle runs and that all lights work. Turn on your headlights, brake lights, and turn signals to check them yourself. Press the brake pedal to make sure it feels firm and does not sink to the floor.
Check your tire pressure and tread depth. Tires with very low pressure or very little tread will fail the safety inspection. Make sure your windshield wipers work and that your mirrors are find.
For the emissions test, drive your vehicle for at least 10 to 15 minutes before you arrive at the station. A cold engine can produce higher emissions readings. If your vehicle has a check engine light on, get that diagnosed before you test — many stations will not test a vehicle with the check engine light illuminated.
Bring your vehicle registration and proof of insurance. The inspection station will need to see these documents before they test your vehicle.
What to do if your vehicle fails either test
If your vehicle fails the safety inspection, the station will give you a written report listing what failed. You have 30 days from the test date to have the repairs done and return for a retest at any licensed station. You do not have to return to the same station.
If your vehicle fails the emissions test, you also have 30 days to repair it and retest. For emissions failures, the inspection station or a repair shop can help you figure out what is wrong. Many repair shops can read your vehicle's diagnostic codes to pinpoint the problem.
If you repair your vehicle and it still fails the retest, you can try again. There is no limit to how many times you can retest, but you will pay the testing fee each time. Some vehicles with very old engines or serious mechanical problems may not be able to pass emissions testing — in that case, you may need to consider whether the repair cost is worth keeping the vehicle.
How long the inspection is valid and when to renew
Once your vehicle passes both tests, the inspection is valid for one year from the date of the test. Your registration renewal notice will tell you when your inspection expires. You must renew your inspection before your registration expires.
You can take your vehicle for inspection up to 90 days before your registration expires. This gives you time to make repairs if your vehicle fails, and still get your registration renewed on time.
If your registration expires before you renew your inspection, you cannot legally drive your vehicle on public roads. Renew your inspection as soon as you receive your renewal notice to avoid this problem.
Frequently Asked Questions
Can I test my vehicle in one county and register it in another?
Yes. You can have your vehicle inspected at any licensed station in Utah, regardless of which county you live in. However, your vehicle must meet the emissions standards for the county where you register it. If you move to a county with stricter standards, your vehicle may need to pass a stricter test.
What if I just bought a used vehicle from out of state?
You must pass both the safety inspection and emissions test before you can register it in Utah. You have a grace period to get the inspection done — typically 30 days from the date you register it — but you cannot legally drive it on public roads until it passes. Check with your county clerk about the exact timeline.
Do I have to fix my vehicle at the inspection station?
No. If your vehicle fails, you can take it to any repair shop you choose, or fix it yourself if you have the skills. You can then return to any licensed inspection station for a retest. You do not have to go back to the same station where it failed.
What if my vehicle has a check engine light on?
Most inspection stations will not perform an emissions test if the check engine light is on. You will need to have the problem diagnosed and repaired first. A repair shop can read the diagnostic code to find out what is wrong. Once the light is off and the repair is confirmed, you can return for testing.
How much does the inspection cost?
The state sets a maximum fee, but individual stations may charge less. Fees vary by station and by county. Call ahead to ask what the station charges for both the safety inspection and emissions test combined. Budget between $30 and $60 total, though some stations may charge more.