Emissions testing in Lombard happens at state-certified facilities, not at the Secretary of State's office

Lombard is in DuPage County, which is part of the Chicago metropolitan area and subject to Illinois emissions testing requirements. You cannot take your test at the Lombard Secretary of State facility — that office handles vehicle registration and title work only. Instead, you need to find a state-certified emissions testing station, which can be a repair shop, quick-lube facility, or dedicated testing center that holds an Illinois emissions testing license.

The state maintains a searchable database of certified stations on the Illinois Environmental Protection Agency (IEPA) website. You can filter by county and city to see which stations near Lombard are currently licensed to perform the test. The test itself takes about 15 minutes and costs between $25 and $35 at most facilities, though prices vary by location.

Key Takeaways

  • Certified emissions testing stations in Lombard are listed on the IEPA website, searchable by location and current license status.
  • The test costs roughly $25 to $35 and takes about 15 minutes, and you need a valid vehicle registration to bring with you.
  • Your vehicle must pass the test before you can renew your registration; a failed test requires repairs and a retest at the same facility, usually at no additional charge.
  • Vehicles over 25 years old and certain low-mileage vehicles are exempt from testing, but you still need to verify your vehicle's status before assuming you can skip it.

How to find a testing station near Lombard

Go to the IEPA website and use their certified station locator tool. Enter Lombard or your zip code (60148 covers much of central Lombard) and the tool will show you all active testing stations within a set radius. Each listing includes the station's address, phone number, and hours of operation. Call ahead before you go — some stations fill up during peak hours or may have equipment downtime.

Many repair shops and tire retailers in Lombard hold emissions testing licenses as a side service. If you already have a mechanic you trust, ask whether they are certified; if they are, you can combine your test with any other work you need done. This can save you a trip, though the test itself must be performed by a licensed technician regardless of whether other work happens at the same time.

What to bring and what happens during the test

Bring your vehicle registration and a valid photo ID. The technician will connect your vehicle to a diagnostic machine that reads your engine's emissions data. For most vehicles made after 1996, this is a computer-to-computer connection that takes a few minutes. The machine checks whether your vehicle's emissions are within state limits for your vehicle's model year and engine type.

The test does not involve a visual inspection or a road test. Your vehicle straightforward needs to be in running condition and have a functioning check-engine light (if it does not light up when you turn the key to the "on" position, the test station may flag this as a problem). If your vehicle passes, you receive a certificate or a digital record that you can use to renew your registration. If it fails, the technician will tell you which emissions systems are not working properly and recommend repairs.

What happens if your vehicle fails the test

A failed test means your vehicle's emissions are above the state limit for your vehicle type. Common reasons include a faulty oxygen sensor, a malfunctioning catalytic converter, or an engine control problem. You will need to have the vehicle repaired by a mechanic before you can retest.

Most testing stations allow you to retest at the same facility after repairs, and many do not charge for the retest if you return within a set timeframe (usually 30 days). Keep your failed test certificate — you may need it to show a mechanic what systems failed. You cannot renew your vehicle registration until you pass the test, so plan for repair time before your registration expires.

Vehicles exempt from emissions testing in Illinois

Vehicles manufactured before 1996 are exempt from emissions testing in Illinois. Vehicles over 25 years old are also exempt, regardless of when they were manufactured. Some vehicles with very low annual mileage (typically under 5,000 miles per year) may be exempt, but you need to verify this with the testing station or the Secretary of State before assuming your vehicle qualifies.

Diesel vehicles have different testing requirements than gasoline vehicles, and not all testing stations perform diesel tests. If you own a diesel vehicle, confirm that your chosen station is licensed for diesel testing before you go. Electric vehicles do not require emissions testing.

Timing and registration renewal

You need a passing emissions test before you can renew your vehicle registration. The test result is valid for 30 days, so plan to take your test within a month of when you plan to renew. If your registration is expiring soon, schedule your test early — if you fail and need repairs, you will have time to get the work done and retest before your registration lapses.

You can renew your registration online, by mail, or in person at the Secretary of State facility in Lombard. Bring your passing emissions test certificate or have your digital test result ready. If you renew online or by mail, you will upload or mail a copy of the test result along with your renewal process.

Frequently Asked Questions

Can I test my vehicle at any repair shop, or does it have to be a specific type of facility?

Any state-certified emissions testing station can perform your test, whether it is a dedicated testing center, a repair shop, a quick-lube facility, or a tire retailer. The facility must hold an active Illinois emissions testing license. Check the IEPA locator to confirm the station you choose is currently licensed.

What if I fail the test and do not know what repairs I need?

The testing station will provide a report showing which emissions systems failed. Take this report to a mechanic and ask them to diagnose the problem. Common failures are oxygen sensors, catalytic converters, and engine control issues. Many repair shops can diagnose the problem for a small fee if you do not want to pay for full repairs without knowing what is wrong.

Do I need an appointment, or can I just show up?

Most testing stations accept walk-ins, but call ahead during busy times (typically late afternoon and weekends). Some stations in high-traffic areas may have a wait or may ask you to come back at a less busy time. Having an appointment guarantees your spot and can save you time.

How long is my test result valid?

Your passing test result is valid for 30 days. You must renew your registration within that window. If your registration expires before you can renew, you will need to retest even if your first test was recent.