What Aurora's emissions testing program does
Aurora, Colorado runs its own emissions testing program through the city, separate from the state's regional testing network. If you live in Aurora and your vehicle is registered there, you'll take your car to an Aurora-approved testing station rather than to a state facility. The test itself is the same — it measures what comes out of your tailpipe — but the paperwork, fees, and renewal schedule follow Aurora's rules, not Colorado's statewide system.
This matters because Aurora's program has its own inspection schedule, its own list of approved testing stations, and its own fee structure. You cannot take an Aurora-registered vehicle to a state testing center and have it count toward Aurora's requirement. The city maintains this separate system because it sits in an area that has historically had air quality concerns, which triggers stricter local oversight.
Key Takeaways
- Aurora residents must use Aurora-approved testing stations, not state facilities, because the city runs its own emissions program.
- Your vehicle's registration address determines which program covers you — if registered in Aurora, you follow Aurora's rules and fees.
- Aurora's testing schedule and approved station list are available through the city's website or by calling the Aurora Public Works Department.
- A failed test in Aurora follows the same repair-and-retest path as elsewhere in Colorado, but you must retest at an Aurora station.
Finding an Aurora-approved testing station
The City of Aurora maintains a current list of stations licensed to perform emissions testing under its program. You can find this list on the Aurora city website under the Public Works or Environmental Services section, or by calling the Aurora Public Works Department directly. The list includes the station name, address, phone number, and hours — information you need before you show up.
Not every emissions testing station in the Denver area is approved for Aurora vehicles. A station licensed by the state to test vehicles in uncontrolled areas may not be licensed for Aurora's stricter program. Calling ahead to confirm the station is on Aurora's current approved list saves a wasted trip. Many stations test by appointment, and some have walk-in hours; the list will tell you which.
Aurora's testing schedule and renewal timing
Aurora follows a biennial (every two years) testing schedule for most vehicles, though the specific month your test is due depends on your vehicle's model year and registration renewal date. Your registration notice will tell you when your next emissions test is due. Unlike some Colorado counties that test on a calendar-year basis, Aurora ties the test to your registration cycle.
You can test up to 60 days before your test is due without penalty. Testing early gives you a buffer if your vehicle fails and needs repairs — you'll have time to fix it and retest before your registration expires. If you wait until after the due date, your registration becomes invalid, and you cannot legally drive the vehicle until you pass the test and renew.
What happens if your vehicle fails the test
A failed emissions test in Aurora means your vehicle did not meet the tailpipe standards for that model year. The testing station will give you a written report showing which emissions exceeded limits. You then have the option to repair the vehicle and retest, or to dispute the results through Aurora's appeal process (which is rare and requires technical evidence).
Most people choose to repair. You can take the vehicle to any mechanic — you are not required to use a specific shop — and have them address the emissions problem. Common repairs include replacing a faulty oxygen sensor, fixing a vacuum leak, or addressing a catalytic converter issue. Once repaired, you return to any Aurora-approved station to retest. There is no limit to how many times you can retest, but each retest costs the standard testing fee.
Aurora emissions testing fees
Aurora charges a fee for each emissions test. The exact amount varies and can change year to year, so confirm the current fee when you call to schedule your test. The fee covers the test itself; it does not include any repairs your vehicle might need if it fails. You pay the fee whether your vehicle passes or fails, and you pay it again if you retest after repairs.
Some Aurora-approved stations may charge additional fees for services like inspection reports or expedited scheduling. Ask about the total cost when you call, not just the base testing fee. If cost is a barrier, ask whether the station offers payment plans or whether Aurora has any fee-waiver programs for low-income residents — some cities do, though you would need to confirm with Aurora directly.
Vehicles exempt from Aurora testing
Not every vehicle registered in Aurora must be tested. New vehicles (typically those less than four model years old) are exempt from emissions testing for their first few years. Vehicles powered entirely by electricity are exempt. Some older vehicles and specialty vehicles may also be exempt depending on their age and type.
Your registration notice will tell you whether your vehicle is subject to testing. If you are unsure, call the Aurora Public Works Department or ask when you contact a testing station. Driving a vehicle that is required to be tested but has not been tested is a registration violation, so it is worth confirming your vehicle's status before your renewal date arrives.
What to bring to your emissions test
Bring your vehicle registration or renewal notice, which shows your vehicle identification number (VIN) and confirms you are due for testing. Bring a valid photo ID. Some stations may ask for your driver's license number. That is all you need — you do not need to bring repair records, previous test results, or proof of maintenance.
Make sure your vehicle's fuel tank is at least half full before you arrive. The test requires the vehicle to run through a cycle, and an empty tank can cause testing problems. If your check engine light is on, the test may still proceed, but a lit light often indicates an emissions-related problem that will likely cause a failure. You can still test, but be prepared for that outcome.
Frequently Asked Questions
Can I test my Aurora vehicle at a state testing station instead?
No. Aurora's program is separate from the state system, and state stations are not authorized to test Aurora-registered vehicles. You must use an Aurora-approved station. Testing at a state facility would not satisfy Aurora's requirement, and your registration would remain non-compliant.
What if I move out of Aurora but my vehicle is still registered there?
Your vehicle remains subject to Aurora's testing program as long as it is registered in Aurora. If you move to another Colorado city or county, you can transfer your registration to your new address, which would move you into that area's testing program. Contact the Aurora Motor Vehicle Office about re-registration.
How long does an emissions test take?
The actual test usually takes 10 to 20 minutes, though the total time at the station depends on how busy it is. If you have an appointment, you may wait less. Walk-in testing can involve a longer wait, especially during peak times near registration important date.
Can I retest the same day if my vehicle fails?
You can retest the same day only if you made repairs between the first test and the retest, and only if the station has availability. Most stations will not retest a vehicle that failed without evidence of repair work. Plan on at least one day between a failed test and a retest to allow time for repairs.
What if the testing station gives me a different result than I expected?
The test results are based on your vehicle's actual emissions at that moment. If you believe the result is wrong, you can request a retest at the same or a different Aurora-approved station. Some stations offer a second test at a reduced fee if you request it when ready after a failure. Keep your test paperwork in case you need to dispute the result through Aurora's formal process.