Inspection Tips for Gasoline-powered Vehicles
Which model-year vehicles require a safety inspection?
The State of Utah requires a safety inspection for most gasoline-powered cars, but the frequency of the inspection depends on the age of the vehicle.
- For newer vehicles, a safety inspection is required when the model year is four, eight and ten years old.
- For vehicles ten years and older, it must pass a safety inspection every year.
Which vehicles require an emission inspection?
The rules for emission inspections vary by the county of the vehicle's registration and the model year of your vehicle.
Less than two years old:
If your vehicle is less than two years old, it does not need an emission inspection in any county in Utah.
Less than six years old:
Model years less than six years old must be tested every other year for vehicles registered in:
- Davis County
- Salt Lake County
- Utah County
- Weber County
To make this easier to remember, vehicles with even-numbered model years are tested in even-numbered years while vehicles with odd-numbered model years are tested in odd-numbered years.
Six years and older:
Classic cars with a model year of 1967 and older are exempt and do not require an emission test. For all other gasoline and diesel cars, certain counties require an emission test every other year using the same method as above: vehicles with even-numbered model years are tested in even-numbered years while vehicles with odd-numbered model years are tested in odd-numbered years. This rule applies if your vehicle is registered in:
- Cache County (see http://www.brhd.org/ for details)
- Davis County (see http://www.co.davis.ut.us/health/ for details)
- Salt Lake County (see http://www.slvhealth.org/ for details)
- Utah County (see http://www.utahcountyonline.org/ for details)
- Weber County (see http://www.co.weber.ut.us/health/ for details)
Tips for newer model-year vehicles:
Vehicles model-year 1996 and newer undergo a scan of the On-Board Diagnostic (OBD) system to help determine if the vehicle's emission control systems are operating properly. The State of Utah's passing criteria combines data from the OBD with a visual inspection.
The following tips will help your car, van, truck, or SUV pass its inspection, and at the same time help the environment!
- Regular maintenance
Change your oil and filters as recommended by your vehicle's manufacturer (usually every 3 months or 3,000 miles) to help your vehicle operate efficiently and increase its odds of passing the emission test. It is also important to use the type of oil and fuel recommended by the manufacturer for best performance.
- Watch for leaks
Low fluid levels can affect the efficiency and performance of your vehicle, which can cause a test failure.
- Gas cap required
State regulations require that your gas cap is in place and is of the correct type for your vehicle to avoid excess evaporative emissions.
- Watch for warning lights
The same "On Board Diagnostics" system in your vehicle that triggers the warning light is the same system that reports its information to our inspection station's computer determining if your vehicle meets state requirements, so if your vehicle's computer is triggering a "Check Engine" light, it may not pass the inspection.
- New or disconnected battery?
If your battery is disconnected, or if it died and needed a jump start, your vehicle's computer system resets itself and would fail due to a lack of data even if your vehicle is operating properly. Driving between 100 - 150 miles (consult your vehicle's manual for an exact number) before coming in for your inspection will make sure your vehicle has gathered enough information for its test.
Extra tips for older model-year vehicles:
State and county requirements for model years older than 1996 are a little different as these older vehicles don't have the computer systems installed to report information about the vehicle's performance.
- Plan a little extra time
Older vehicles require a longer inspection process and may take a little longer, usually around 20 minutes from start of the inspection to getting back on the road.
- Tune-up before your emission inspection
If your vehicle is registered in a county where an emissions test is required, a tailpipe emissions test is required on older vehicles. Dirty oil or a clogged air filter could affect your test results, so if your vehicle is due for an oil change you may want to do so before your emission inspection.
- Watch for warning signs
Road-weary vehicles can start to show signs of a faulty emissions system, including difficulty starting or staying running at idle, jumping or shaking at higher speeds, and misfires. Taking your vehicle to a certified repair shop as soon as you notice a worsening trend can catch problems before they escalate into a more major repair or test failure.
Visit a DEKRA station for more expert advice and a fast, professional vehicle inspection. Download a $5 off coupon for your vehicle's next inspection!