Where to Find Emissions Testing in Aurora

Aurora does not have its own emissions testing program. Instead, Colorado's statewide program handles all testing, and you can visit any Colorado Department of Revenue emissions testing station in the Denver metro area to complete your test. The closest stations to Aurora are in Denver, Littleton, and surrounding counties — all within a 20-minute drive for most Aurora residents.

The state operates these stations through contracted vendors, not through city or county offices. You cannot call Aurora city government to schedule a test; you need to contact the state program directly or visit a private testing station that Colorado has approved to perform emissions work.

Testing stations are open year-round, but demand peaks in the weeks before your registration renewal important date. If your registration expires in a specific month, you can test anytime in the two months before that month — so if your registration expires in June, you can test starting in April.

Key Takeaways

  • Colorado's state program runs all emissions testing; Aurora has no local testing stations, but Denver and Littleton stations are close by.
  • You can find approved testing locations and hours on the Colorado Department of Revenue website or by calling their hotline.
  • Testing costs between $20 and $30 depending on your vehicle type and the station you choose.
  • You can test anytime in the two months before your registration renewal month, so plan ahead during busy seasons.
  • Bring your vehicle registration, proof of insurance, and a valid ID; the test itself takes 10 to 15 minutes.

How to Locate a Testing Station Near Aurora

The Colorado Department of Revenue maintains a searchable list of all approved emissions testing stations on its website. Go to the Air Quality Control Commission section, find the emissions testing locator, and enter your ZIP code or city name. The search will show you every station within your area, their hours, phone numbers, and whether they accept walk-ins or require appointments.

Most stations in the Denver metro area accept walk-ins during regular business hours, though some require you to call ahead during peak seasons (typically March through May and September through November). If you prefer to schedule in advance, you can call the station directly — their number appears in the search results.

You can also call the Colorado Air Quality Control Commission hotline to ask which stations near Aurora have the shortest wait times on a given day. This is especially useful if you are testing during a busy month and want to avoid a long line.

What to Bring and How the Test Works

Bring your vehicle registration, proof of insurance, and a valid government-issued ID. The technician will ask for these documents before the test begins. You do not need an appointment at most walk-in stations, but calling ahead can save you time.

The test itself takes 10 to 15 minutes. The technician will connect a diagnostic machine to your vehicle's onboard computer port (located under the steering wheel or dashboard on most cars). The machine reads your emissions data and compares it to Colorado's standards for your vehicle's model year and type. You will receive a pass or fail result on the spot.

If your vehicle passes, you will receive a certificate or sticker (depending on the station) that you bring to the Colorado Division of Motor Vehicles when you renew your registration. If your vehicle fails, the station will provide a detailed report showing which emissions systems did not meet standards. You can then take your vehicle to a repair shop, have the problem fixed, and return to any testing station for a retest.

Cost and Payment Methods

Emissions testing in Colorado costs between $20 and $30 per test, depending on your vehicle type and the specific station. Diesel vehicles and vehicles over a certain model year may cost slightly more. Most stations accept cash, debit cards, and credit cards.

If your vehicle fails and you need a retest after repairs, you will pay the full testing fee again. Some stations offer a discount on retests within a certain timeframe (often 30 days), so ask when you receive your fail report.

What Happens If Your Vehicle Fails

A failed emissions test does not prevent you from driving or renewing your registration when ready. However, you cannot complete your registration renewal until you either pass a retest or obtain a waiver from the state.

The testing station will give you a detailed report listing the specific emissions systems that failed. Take this report to a repair shop — they can use it to diagnose and fix the problem. Common failures involve the oxygen sensor, catalytic converter, or fuel system. Repairs typically cost between $100 and $500, depending on what needs to be fixed.

After repairs, you can return to any Colorado emissions testing station for a retest. You do not have to return to the same station where you failed. If you pass the retest, you receive a new certificate and can complete your registration renewal.

Timing Your Test Before Registration Renewal

Colorado allows you to test anytime during the two months before your registration renewal month. For example, if your registration expires in July, you can test starting in May. Testing early gives you time to address any failures before your registration important date.

If you wait until the last week of your renewal month and fail, you may not have time to repair your vehicle and retest before your registration expires. This can result in driving an unregistered vehicle, which carries fines. Plan to test at least three weeks before your renewal important date to give yourself a buffer.

You can find your registration renewal month on your vehicle registration card. If you are unsure when you need to renew, check the Colorado Division of Motor Vehicles website or call their customer service line.

Frequently Asked Questions

Do I need an appointment to get emissions testing in Aurora?

Most stations in the Denver metro area near Aurora accept walk-ins, but calling ahead during busy seasons (March through May and September through November) can save you time. Some stations require appointments during peak periods, so check the station's policy before you go.

What if I just moved to Aurora and my vehicle was tested in another state?

Colorado requires emissions testing for all vehicles registered in the state, regardless of where they were previously tested. You will need to complete a Colorado test before you can renew your registration. Bring your out-of-state registration and ID to the testing station.

Can I test my vehicle if the check engine light is on?

Yes, you can test with the check engine light on. However, your vehicle will likely fail because the light indicates an emissions system problem. Have the vehicle scanned at a repair shop to identify the issue, get it fixed, and then return for a test.

How long does a retest take if my vehicle fails?

The retest itself takes 10 to 15 minutes, just like the first test. The time between your first test and retest depends on how quickly you can get repairs done. Most repair shops can diagnose and fix common emissions failures within a few days.

What if I cannot find a testing station that shows up in the online search?

Call the Colorado Air Quality Control Commission hotline directly — they maintain the most current list of active stations and can tell you which ones are currently open and accepting vehicles. Station locations and hours change occasionally, so the phone line is your most reliable source.