Fort Collins emissions testing locations and what to expect

Fort Collins requires emissions testing for most vehicles registered in the city, and you can get tested at any Colorado Department of Revenue-licensed emissions testing station. The state maintains a searchable list of stations on its website, and most are independent repair shops, tire shops, or quick-lube facilities scattered across Fort Collins and the surrounding area. You'll need your vehicle registration and a valid ID, and the test itself takes about 10 to 15 minutes.

The test measures what your vehicle's exhaust contains — primarily nitrogen oxides and particulate matter — and compares it against Colorado's standards for your vehicle's year and model. If your car passes, you get a certificate that's valid for two years. If it fails, the testing station will give you a report showing what's wrong, and you'll need to have repairs made and retest.

Testing costs vary by station but typically run between $20 and $35. Some stations charge a retest fee if you fail and come back after repairs, though others waive it. Call ahead to ask about the fee structure and whether they can fit you in same-day or if you need an appointment.

Key Takeaways

  • You can find licensed testing stations through Colorado's Department of Revenue website, which lists every station in Fort Collins with phone numbers and hours.
  • Bring your vehicle registration and a valid ID; the test takes 10 to 15 minutes and costs between $20 and $35.
  • A passing test is valid for two years and satisfies Fort Collins registration requirements for that period.
  • If you fail, the station provides a report of what needs repair, and you must retest after fixes are made.
  • Some stations waive retest fees after repairs, so ask about their policy when you call to schedule.

When Fort Collins requires emissions testing

Fort Collins requires emissions testing for vehicle registration if your car is 1975 or newer and you live within the city limits. Diesel vehicles have different standards and are tested separately, so if you drive a diesel truck or van, confirm with the testing station that they handle diesel before you go.

You must test every two years, and the test is due before your registration expires. If your registration is expiring in the next 60 days, you can test now and the certificate will be valid when you renew. If you're past your expiration date, you'll need the test before you can renew your registration at all.

Vehicles registered outside Fort Collins but garaged in the city may have different rules depending on what county they're registered in. Check your registration paperwork or call the Fort Collins Motor Vehicle Services office to confirm whether you're required to test.

What happens if your vehicle fails the test

A failing test doesn't mean you can't drive your car — it means you can't renew your registration until you fix the problem and retest. The testing station gives you a detailed report showing which emissions standards your vehicle didn't meet, and that report is what a repair shop will use to diagnose the issue.

Common reasons for failure include a faulty oxygen sensor, a loose or missing gas cap, a malfunctioning catalytic converter, or problems with the engine control system. Some of these are cheap fixes; others are expensive. Before you spend money on repairs, you can take the failure report to a trusted mechanic and ask them to estimate the cost and likelihood of fixing the specific problem the test identified.

After repairs are made, you return to any licensed testing station for a retest. Some stations offer a reduced retest fee or waive it entirely if you return within a certain window — usually 30 days. Ask about this when you first test, so you know what to expect if you fail.

Finding a testing station near you

The Colorado Department of Revenue maintains a searchable map of all licensed emissions testing stations at cdor.colorado.gov. You can filter by city and see each station's address, phone number, and hours of operation. Most stations are open Monday through Friday during business hours, and some offer Saturday morning testing.

Call ahead before you go. Ask whether they have same-day appointments available, what their testing fee is, whether they charge a retest fee, and whether they handle your vehicle type (standard gasoline, diesel, or hybrid). Some stations are busier than others, especially near the end of the month when people are rushing to renew registrations.

If you can't find a station with availability in Fort Collins itself, you can test at any licensed station in Colorado — the certificate is valid statewide. Stations in nearby Loveland or Windsor may have shorter wait times if Fort Collins locations are booked.

Documents and information to bring

Bring your vehicle registration and a valid photo ID. The registration shows your vehicle identification number (VIN) and the year and model, which the testing station needs to run the correct test for your car. If you're testing a vehicle you recently purchased and haven't received the registration yet, bring the bill of sale or temporary registration instead.

If your vehicle failed a previous test, bring that failure report with you. It helps the testing station understand what was tested before and what the specific failure was, which can speed up the retest process. You don't need to bring repair receipts or proof of work done — the station will straightforward run the test again and see whether the vehicle now passes.

Emissions testing and vehicle registration renewal

You can't renew your Fort Collins vehicle registration without a passing emissions test certificate. When you renew online, by mail, or in person at the Motor Vehicle Services office, you'll need to provide proof of a current test. If you test within 60 days before your registration expires, you can renew when ready; if you test after expiration, you'll need to renew first and then test.

The certificate is valid for two years from the date of the test, so you don't need to test again until your next registration renewal cycle. Keep the paper certificate or take a photo of it for your records, in case you need to show proof of testing.

Frequently Asked Questions

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

Yes, you can test with the check engine light on, but your vehicle will likely fail. The light indicates a problem with the emissions control system, which is what the test measures. Have a mechanic diagnose the issue first, then test after repairs are made.

What if I just moved to Fort Collins — do I need to retest?

If your vehicle has a current passing certificate from another Colorado county, you don't need to retest when ready. However, when that certificate expires, you'll need to test at a Fort Collins station to renew your registration. If you moved from out of state, check with Fort Collins Motor Vehicle Services about whether your previous test is recognized.

How long does a retest take after I fix my vehicle?

The retest itself takes the same 10 to 15 minutes as the initial test. However, you may need to wait for an appointment, so call the station a day or two before you plan to bring the vehicle in. Some stations prioritize retests and can fit you in faster than new tests.

What if my vehicle is too old to test?

Vehicles manufactured before 1975 are exempt from emissions testing in Colorado. If your vehicle is older than that, you don't need a test to register it in Fort Collins. Bring your registration paperwork to the Motor Vehicle Services office to confirm the exemption.

Can I test a vehicle I'm about to buy?

Yes, you can test any vehicle you own or have permission to test. If you're buying a used car, you can test it before you complete the purchase to see whether it will pass Fort Collins requirements. This can help you decide whether to negotiate repairs into the sale price or walk away from the deal.