What Indiana Requires for Emissions Testing

Indiana requires emissions testing for most vehicles registered in Marion County (which includes Indianapolis) and Hamilton County. If you live outside these two counties, you do not need an emissions test to renew your registration. If you live in one of these counties, your vehicle must pass an emissions test before you can renew your registration — the test is not optional.

The test measures your vehicle's tailpipe emissions to may support it meets federal Clean Air Act standards. A certified technician will connect a probe to your vehicle's exhaust system and record the levels of nitrogen oxides, carbon monoxide, and other pollutants. The whole process takes about 10 to 15 minutes.

Vehicles model year 1968 and newer must be tested. Diesel vehicles, motorcycles, and vehicles registered as antiques are exempt. If your vehicle is brand new (current model year), you may be exempt for the first two years of registration, depending on when you registered it.

Key Takeaways

  • Only Marion County and Hamilton County residents need emissions testing; all other Indiana counties do not require it.
  • You must pass the test before you can renew your vehicle registration in those counties.
  • The test takes 10 to 15 minutes and checks your vehicle's tailpipe emissions against federal standards.
  • You can get tested at any certified emissions testing station, and the fee is set by the state at $16.50 per test.
  • If your vehicle fails, you have 30 days to repair it and retest at no additional charge.

Finding a Certified Testing Station in Your County

Indiana maintains a list of certified emissions testing stations on the Indiana Department of Environmental Management (IDEM) website. You can search by county and city to find stations near you. Most testing stations are independent repair shops, quick-lube facilities, or dedicated emissions testing centers.

Call ahead before you go. Not all stations have the same hours, and some may have a wait during peak times (typically late afternoon and weekends). Ask the station if they have an opening or if you should schedule an appointment. Many stations now allow you to book online.

The test fee is $16.50, set by the state. Some stations may charge an additional fee if you need repairs done at the same location, but the emissions test itself costs the same everywhere.

What Happens If Your Vehicle Fails the Test

If your vehicle fails, the testing station will give you a printed report showing which emissions standards it did not meet. You have 30 days from the test date to repair the vehicle and retest. The retest is free — you do not pay the $16.50 fee again within that 30-day window.

Common reasons for failure include a faulty oxygen sensor, a malfunctioning catalytic converter, or a check engine light that is on. You do not have to repair the vehicle at the same station where you were tested. You can take it to any mechanic you trust. Bring the failure report with you so the mechanic knows what to fix.

After repairs, return to any certified testing station (not necessarily the same one) and request a retest. Once you pass, you can renew your registration when ready.

Renewing Your Registration After Passing the Test

Once your vehicle passes the emissions test, the testing station sends the results electronically to the Indiana Bureau of Motor Vehicles (BMV). You do not need to bring a paper copy to the BMV office, though it does not hurt to have one.

You can renew your registration online through the BMV website, by mail, or in person at any BMV branch. Online renewal is the fastest option if you have a valid driver's license and your vehicle information is current in the system. Registration renewal costs vary based on your vehicle's weight and type.

Your registration renewal notice will tell you the important date. If you live in Marion or Hamilton County, do not submit your renewal until you have passed the emissions test — the BMV will reject the renewal if the test results are not on file.

What to Do If You Cannot Find a Testing Station or Have Other Issues

If you cannot locate a certified station near you or believe a station gave you an incorrect result, contact the Indiana Department of Environmental Management directly. IDEM oversees the emissions testing program and can answer questions about station locations, test procedures, and dispute resolution.

If a station refuses to retest you within 30 days at no charge after a failure, report it to IDEM. If you believe your vehicle was tested incorrectly, you can request a review, though this process varies by situation.

If your vehicle is very old or has significant mechanical problems, you may want to consult a mechanic before testing to understand what repairs might be needed. Some repair shops offer a pre-test inspection for a small fee, which can help you avoid a failed test and the cost of a second visit.

Emissions Testing and Vehicle Registration Timing

Plan to get your emissions test done at least two weeks before your registration expires. This gives you time to repair the vehicle if it fails and retest before the important date. If you wait until the last few days, a failure could leave you with an expired registration while you arrange repairs.

Your registration renewal notice will show your expiration date. If you are unsure when your registration expires, you can check the BMV website or call your local BMV branch. Some stations are busier than others, so calling ahead to ask about wait times can help you schedule efficiently.

Frequently Asked Questions

Do I need an emissions test if I just moved to Indiana from another state?

Only if you move to Marion County or Hamilton County and register your vehicle there. When you register your vehicle in Indiana, you will be told whether an emissions test is required based on your county. If you move to a county that does not require testing, you do not need one.

What if my vehicle has a check engine light on?

Your vehicle will likely fail the emissions test if the check engine light is on. Have the light diagnosed and the problem fixed before you test. Once the light is off and the repair is complete, you can retest. Some repair shops can read the code for free or a small fee.

Can I test my vehicle in a different county if I live in Marion or Hamilton County?

Yes. You can be tested at any certified station in Indiana, not just in your home county. The results are reported to the BMV under your vehicle's registration, so it does not matter where the test was performed.

What if I fail the test twice?

You can retest as many times as you need within the 30-day window after your first failure. Each retest is free. If you cannot get the vehicle to pass within 30 days, you will need to contact the BMV about your registration renewal options, as you cannot renew without a passing test in Marion or Hamilton County.

Is there a way to get an extension if I cannot repair my vehicle in time?

Extensions are not automatic, but you can contact the BMV to discuss your situation. Some hardship cases may be considered, though this is handled on a case-by-case basis. Do not wait until after your registration expires — contact the BMV before the important date.