What Air Team does and when you need it

Air Team is a vehicle emissions testing program run by the California Air Resources Board (CARB) that tests whether your car meets the state's pollution standards. If you live in California and your vehicle is registered there, you will need to pass an Air Team test as part of your regular smog check — the state requires it every two years for most vehicles, or annually for vehicles over a certain age depending on your county.

Air Team testing centers are privately operated but follow CARB standards. When you take your car in, a technician will connect diagnostic equipment to your vehicle's onboard computer and run a series of tests to measure emissions from your tailpipe and fuel system. The test takes about 30 minutes. You will receive a pass or fail result on the spot, and that result goes directly into the state's database.

You cannot register or renew your vehicle registration in California without a passing smog check on file. If your car fails, you have options: you can repair it and retest, or in some cases pay a fee to get a waiver if repairs are too expensive.

Key Takeaways

  • Air Team tests whether your car meets California's emissions standards as part of the state's smog check requirement, which is mandatory for registration.
  • The test connects to your vehicle's onboard computer and takes about 30 minutes; you get a pass or fail result when ready.
  • You must pass before you can register or renew your vehicle, and the result is reported to the state automatically.
  • If you fail, you can repair the vehicle and retest, or request a waiver if repair costs exceed a certain threshold set by your county.
  • Test frequency depends on your vehicle's age and your county; most vehicles need testing every two years, but older cars may need it annually.

How the test works and what it measures

When you arrive at an Air Team testing center, bring your vehicle registration and a valid ID. The technician will ask for your vehicle identification number (VIN) and mileage, then connect a diagnostic scanner to your car's onboard diagnostic (OBD) port — usually located under the steering wheel or dashboard. This port is standard on all vehicles sold in the United States since 1996.

The scanner reads data from your vehicle's emissions control system and checks whether the system is working correctly. It measures nitrogen oxides (NOx), particulate matter, hydrocarbons, and carbon monoxide. For newer vehicles, the test is almost entirely computer-based; the technician does not need to run your engine or put your car on a dyno. For older vehicles, the test may include a tailpipe probe that measures exhaust directly.

The test also checks whether your check engine light is on. If it is, the test will fail automatically because an illuminated check engine light means your emissions system has detected a problem. You will need to have the problem diagnosed and repaired before you can pass.

Passing, failing, and what happens next

If your vehicle passes, the Air Team center will print a smog check certificate and report the result to the California Department of Motor Vehicles (DMV) within one business day. You can then register or renew your vehicle online, by mail, or in person at a DMV office. The certificate is valid for 30 days if you have not yet registered, so you have a window to complete registration.

If your vehicle fails, you will receive a detailed report showing which emissions standards your car did not meet. You then have two paths: repair the vehicle and retest, or request a smog abatement waiver if the cost to repair exceeds a threshold set by your county (usually between $500 and $800, depending on where you live).

To get a waiver, you must have the vehicle diagnosed by a CARB-certified repair shop, get a written repair estimate, and submit that estimate to your county's air quality management district along with your failed smog check. If the estimate exceeds the threshold, the district will issue a waiver that lets you register without passing the test. The waiver is good for one or two years depending on your county, after which you will need to test again.

Finding an Air Team testing center near you

Air Team operates testing centers throughout California. To find one, visit the official CARB smog check locator at smogcheck.ca.gov or call the CARB hotline at 1-800-END-SMOG (1-800-363-7664). You can search by ZIP code or city. The locator shows hours, whether the center accepts walk-ins or requires appointments, and what payment methods they take.

Testing fees vary by location but typically range from $30 to $50 for a basic smog check. Some centers charge more if your vehicle requires additional testing or if you need a retest. Ask about the fee before you schedule or arrive, since prices are not regulated by the state.

Many testing centers are busy during peak times — late afternoon on weekdays and Saturday mornings are usually crowded. If you can test on a weekday morning, you will likely wait less. Some centers take appointments online; others operate first-come, first-served. Check the locator to see what your nearest center offers.

Preparing your vehicle for the test

Before you take your car in, make sure your check engine light is off. If it is on, have the vehicle scanned at a repair shop to find out what the problem is. You do not need to fix it before the smog check — the test will straightforward fail, and you will know what needs repair. However, if you want to pass on your first attempt, fix the problem first.

Your vehicle should be in normal operating condition. The engine should start easily and run smoothly. If your car has been sitting unused for weeks, drive it for at least 20 minutes before testing to warm up the engine and clear out any temporary fault codes. Do not make any major repairs or modifications to your emissions system right before the test; the vehicle needs a few miles of normal driving for the system to stabilize.

Bring your current registration and a valid ID. Have your VIN and current mileage ready — the technician will ask for both. If you have had recent work done on your emissions system, bring the receipt; it can help explain any borderline readings.

Costs and timing for retesting and waivers

If you fail and choose to repair and retest, each retest costs the same as the initial test — typically $30 to $50. You can retest at the same center or a different one; the result will be reported to the DMV either way. There is no waiting period between a failed test and a retest, so you can fix the problem and come back the same day if the center is still open.

If you request a waiver instead, you will need a repair estimate from a CARB-certified shop. Getting that estimate usually takes a few days to a week, depending on how busy the shop is. Once you submit the estimate to your county's air quality district, approval typically takes two to four weeks. During that time, you cannot register your vehicle, so plan ahead if your registration is about to expire.

Waiver fees vary by county but are usually $20 to $50. Some counties charge a fee to submit the waiver process; others do not. Contact your county's air quality management district to confirm the fee and the exact process for your area.

Special cases: new vehicles, out-of-state transfers, and exemptions

New vehicles (typically those less than six model years old) are exempt from smog checks for the first four years of registration in California. After that, they must test like any other vehicle. If you are transferring a vehicle from out of state, you will need a smog check before you can register it in California, even if it would not need one in your home state.

Electric vehicles (EVs) and plug-in hybrids registered in California are exempt from smog checks entirely, since they produce zero tailpipe emissions. Diesel vehicles have separate testing requirements and may need to test at a different type of facility; ask the CARB hotline if you own a diesel car.

If your vehicle is registered in a county that does not require smog checks — a few rural counties have exemptions — you still do not need to test. Check your registration notice; it will say whether a smog check is required for your vehicle.

Frequently Asked Questions

What if my check engine light is on but the problem is not related to emissions?

The smog check will still fail. The test is automated and does not distinguish between emissions-related problems and other issues. You will need to have the problem diagnosed and the light turned off before you can pass, even if the problem has nothing to do with pollution control.

Can I test my vehicle in a different county than where it is registered?

Yes. The test result is reported to the DMV by your VIN, not by location. You can test anywhere in California and the result will be valid for registration in your home county. However, if you need a waiver, you must request it from the air quality district in the county where your vehicle is registered.

How long is a passing smog check good for?

A passing result is valid for 30 days if you have not yet registered your vehicle. Once you register, the result is on file and you do not need another test until your next renewal — typically two years later, or one year for vehicles over a certain age depending on your county.

What if I fail the test twice in a row?

You can keep retesting as many times as you need. There is no limit on the number of attempts. However, if repair costs are high, you may want to request a waiver instead of continuing to pay for retests. Talk to a repair shop about what the problem is and what it will cost to fix before you decide.

Do I need an appointment, or can I just walk in?

It depends on the testing center. Some take walk-ins; others require appointments. Check the CARB smog check locator for your nearest center to see what they offer. If you want to avoid a wait, call ahead or book online if the option is available.