Arizona emissions tests cost between $20 and $50 at most testing stations, depending on your vehicle type and the testing facility
Arizona requires emissions testing for most vehicles registered in Maricopa and Pima counties (the Phoenix and Tucson areas). The test itself—measuring what comes out of your tailpipe—is a fixed procedure, but the fee each station charges varies. You'll pay less at a state-contracted testing station than at a private repair shop that also offers testing. Heavy-duty diesel vehicles and motorcycles may cost more or have different testing requirements.
The state does not set a single price. Instead, it caps what stations can charge: $30 for most passenger vehicles at state-contracted stations, though private shops can charge more. Some stations offer discounts or package deals if you combine the emissions test with a safety inspection or other services. You need to contact stations in your area to compare their exact prices.
Key Takeaways
- Arizona emissions tests cost $20 to $50 depending on whether you use a state-contracted station or a private repair shop.
- Only vehicles in Maricopa and Pima counties are required to test; most of the rest of Arizona does not require emissions testing.
- You can find state-contracted testing stations through the Arizona Department of Environmental Quality website or by calling 602-771-2300.
- The test is valid for two years from the date you pass, and you must renew your vehicle registration before the test expires.
- If your vehicle fails, you have 60 days to repair it and retest at no additional charge at the same station.
Where to get tested and what each type of station charges
State-contracted testing stations are your lowest-cost option. These are independently owned shops that have signed an agreement with Arizona to perform emissions tests at a capped price. Most charge around $20 to $30 for a standard passenger vehicle. You can find a list of contracted stations by county on the Arizona Department of Environmental Quality (ADEQ) website, or call 602-771-2300 to locate one near you.
Private repair shops and dealerships that offer emissions testing can charge more than the state cap—sometimes $40 to $50 or higher. You may choose to use them if they're more convenient or if you want to combine the test with other work on your vehicle. Some shops bundle the emissions test with a safety inspection or oil change at a package price, which may or may not save you money depending on what you need done.
A few stations offer walk-in testing with short wait times; others require an appointment. Call ahead to ask about their current wait time and whether you need to book a slot. Bring your vehicle registration and proof of insurance, though the tester will not need to see them—they're just good to have on hand.
What happens if your vehicle fails the test
If your vehicle fails, you have 60 days to repair the problem and return to the same testing station for a retest. The retest is free—you pay only if you choose to use a different station. Most stations will tell you on the spot what the failure code means, though they may not diagnose the exact repair needed. Common failures involve the oxygen sensor, catalytic converter, or fuel system issues.
You do not have to repair at the testing station. You can take your vehicle to any mechanic you trust. Bring the failure report with you so the mechanic knows what to look for. After repairs, return to the original station (or any contracted station) for the retest within the 60-day window.
If you do not retest within 60 days, you cannot renew your vehicle registration. The state will not issue a new registration sticker until you pass the test. If your current registration has already expired, you cannot legally drive the vehicle.
How long the test is valid and when you need to renew
An emissions test is valid for two years from the date you pass it. Your registration renewal notice will tell you when your test expires. In most cases, you'll need to retest before you renew your registration, though the exact timing depends on your registration expiration date.
You can test up to 120 days before your registration expires. Testing early gives you time to repair and retest if you fail, without rushing to meet a important date. Many people test when they renew their registration, which is simpler than tracking two separate dates.
Vehicles exempt from Arizona emissions testing
Not all Arizona vehicles need to test. Emissions testing is required only in Maricopa County (Phoenix area) and Pima County (Tucson area). If you live and register your vehicle elsewhere in Arizona, you do not need an emissions test.
Within those counties, some vehicles are still exempt. Motorcycles, vehicles model year 1967 and older, and certain specialty vehicles (like golf carts or off-road vehicles) do not require testing. Vehicles registered as historical or classic may also be exempt. Check your registration notice or call ADEQ to confirm whether your specific vehicle needs to test.
How to prepare your vehicle for the test
Your vehicle should be in normal operating condition. The tester will plug a probe into your vehicle's exhaust pipe and measure emissions while the engine runs through a short cycle. The test takes about 10 minutes. You do not need to do anything special beforehand—just make sure your vehicle starts and runs normally.
If your check engine light is on, your vehicle will likely fail the test. The light indicates a problem the emissions system has detected. You can still test with the light on, but you'll need to repair the issue and retest. Some repair shops can read the code for free or a small fee, which helps you know what to fix.
Make sure your gas cap is tight and in good condition. A loose or missing cap can trigger a test failure because it allows fuel vapors to escape. This is one of the easiest and cheapest things to fix before testing.
What to bring and what to expect on test day
Bring your vehicle registration and proof of insurance. The testing station will not need to see them to perform the test, but having them on hand is standard practice. You do not need to bring your keys—the tester will handle the vehicle.
The test itself is quick. You'll drive into a bay, the tester will connect equipment to your exhaust, and the engine will run through a short idle and acceleration cycle. You'll get a pass or fail result on the spot, usually within 10 minutes. If you pass, the station will print a certificate or sticker showing your test date and expiration date. Keep this for your records.
If you fail, ask the station for a printed report showing the failure code. This report is what you'll give to a mechanic so they know what to repair. Some stations provide this automatically; others only if you ask.
Frequently Asked Questions
Can I test in a different county than where I live?
Yes. You can test at any contracted station in Arizona, but you must test in either Maricopa or Pima County if your vehicle is registered there. If you're registered outside those counties, you do not need to test at all. The test location does not have to match your registration address.
What if I just bought a used vehicle and it needs an emissions test?
You have until your first registration renewal to pass the test. If you bought the vehicle mid-year, you may have several months before testing is due. Check your registration paperwork for the expiration date. If the vehicle is already overdue for a test, you'll need to test before you can renew.
Do I have to test at a state-contracted station or can I use any shop?
You must use an Arizona Department of Environmental Quality-authorized testing station. Only contracted stations and a few other authorized facilities can perform official emissions tests. A regular repair shop cannot perform the test unless it is also a contracted station. Call ADEQ or check their website to confirm a station is authorized.
What if my vehicle is too old to test?
Vehicles model year 1967 and older are exempt from testing. If your vehicle is newer but very high-mileage or in poor condition, it still must test if it's registered in Maricopa or Pima County. There is no age or mileage exemption for newer vehicles—only the 1967 cutoff applies.
Can I renew my registration online if I haven't tested yet?
No. The Arizona Motor Vehicle Division will not process a registration renewal without proof of a passing emissions test (if your vehicle is required to test). You must pass the test first, then renew your registration. You can renew online, by mail, or in person once the test is complete.