What DEKRA Does for Emissions Testing

DEKRA is a private inspection company that performs emissions tests in several U.S. states as an alternative to state-run testing centers. DEKRA does not set emissions standards — your state does — but DEKRA conducts the actual test, reads your vehicle's data, and reports the result to your state's environmental agency. You pay DEKRA directly for the test fee, which varies by state and vehicle type.

DEKRA operates testing stations in Arizona, California, Georgia, and a few other states. The company is one of several private vendors states contract with to handle the volume of annual emissions tests. If DEKRA has a station near you and your state allows private testing, you can schedule an appointment there instead of waiting at a state facility.

The test itself is identical to what you would receive anywhere: your vehicle is connected to a dynamometer or tailpipe analyzer, emissions data is collected, and the results are compared to your state's legal limits. DEKRA then submits your passing or failing result to your state's environmental or motor vehicle department.

Key Takeaways

  • DEKRA is a private company contracted by states to perform emissions tests, not a government agency, and you must pay the test fee directly to DEKRA.
  • DEKRA operates in select states only — check your state's emissions testing website to see if DEKRA stations are available in your area.
  • The emissions test itself is the same whether you go to DEKRA or a state facility; the difference is location, hours, and how you schedule.
  • You will need your vehicle registration and proof of insurance, and your vehicle must be in working condition to be tested.
  • DEKRA reports your test result directly to your state, so you do not need to submit paperwork yourself.

How to Find a DEKRA Testing Station Near You

Start by visiting your state's official emissions testing website — usually run by the state environmental agency or the motor vehicle department. That website will list all approved testing vendors, including DEKRA if the company operates in your state. The state site will also show you which counties or regions DEKRA covers.

Once you confirm DEKRA is available in your area, you can visit DEKRA's website or call their customer service line to find the specific station closest to you and see their hours. Many DEKRA stations allow you to schedule an appointment online, which can save you wait time. If your state does not list DEKRA as an approved vendor, you will need to use a state-run facility or another private testing company your state contracts with.

What Documents and Information You Need to Bring

Bring your vehicle registration and proof of current insurance. DEKRA will ask to see both before the test begins. You should also know your vehicle's make, model, year, and VIN (vehicle identification number), which is on your registration and on the driver's side of your windshield.

If your vehicle has failed a previous emissions test, bring documentation of any repairs you have had done. This is not required, but it helps DEKRA understand your vehicle's history if there are any questions about the results. If your check engine light is on, tell the technician before the test — some states will not test a vehicle with an active warning light, and DEKRA will let you know whether your vehicle can proceed.

The Emissions Test Process at DEKRA

When you arrive, a DEKRA technician will verify your registration and insurance, then inspect your vehicle visually for obvious emissions equipment problems. The technician will then connect your vehicle to the testing equipment — either a dynamometer (a treadmill-like device your wheels roll onto) or a tailpipe analyzer, depending on your vehicle type and your state's testing protocol.

The test itself takes 10 to 20 minutes. Your vehicle will either sit idle while emissions are measured, or you will drive on the dynamometer while the technician monitors your emissions output in real time. The equipment records nitrogen oxides, particulate matter, hydrocarbons, and carbon monoxide — the pollutants your state regulates. Once the test is complete, DEKRA prints your result on the spot.

If you pass, your result is when ready reported to your state, and you are done. If you fail, DEKRA will give you a copy of the test results showing which emissions exceeded the legal limit. You can then take your vehicle to a repair shop, have the problem fixed, and return for a retest — either at DEKRA or at another approved facility, depending on your state's rules.

DEKRA Test Fees and Payment

DEKRA test fees range from roughly $30 to $80 per vehicle, depending on your state and vehicle type. Diesel vehicles, trucks, and motorcycles often cost more to test than standard passenger cars. Your state's emissions testing website will list the exact fee DEKRA charges in your area.

DEKRA accepts payment at the time of your test — usually cash, card, or both. Some stations may require payment when you schedule your appointment online. If you fail and need a retest, you will pay the fee again. Some states offer a retest discount or waive the retest fee within a certain window (often 30 days), so ask DEKRA about your state's retest policy when you receive your failing result.

What Happens After Your Test Result

DEKRA submits your test result electronically to your state's environmental or motor vehicle agency within one to three business days. You do not need to mail anything or follow up — the result is automatically recorded in your state's system. Your vehicle registration will be updated to show that your emissions test is current.

If you passed, you are finished. Your vehicle is legal to drive and register in your state for the next testing cycle (usually one or two years, depending on your state and vehicle age). If you failed, you have a grace period — typically 30 to 60 days — to have repairs made and return for a retest. During that grace period, you can usually still drive your vehicle legally, but you cannot renew your registration until you pass. Check your state's specific rules, as they vary.

Common Reasons Vehicles Fail at DEKRA

The most common failure reasons are a faulty oxygen sensor, a clogged catalytic converter, a malfunctioning fuel injector, or an engine control module problem. These issues cause your vehicle to burn fuel inefficiently and emit more pollutants than the legal limit. A check engine light often indicates one of these problems, though not always.

Less commonly, a vehicle fails because the engine is straightforward old and worn, or because the owner has been using low-quality fuel or skipping oil changes. A repair shop can read your vehicle's diagnostic codes (the same codes DEKRA's equipment reads) and tell you exactly what is wrong. In some cases, the repair is inexpensive — a new oxygen sensor costs $50 to $200 installed. In other cases, a catalytic converter replacement can cost $500 to $2,500 or more.

Frequently Asked Questions

Can I schedule a DEKRA emissions test online?

Many DEKRA stations allow online scheduling through their website or a booking system. Check the DEKRA station's page for your state to see if appointments are available. If online scheduling is not offered, you can call the station directly to book a time.

What if my vehicle has a check engine light on?

Some states will not test a vehicle with an active check engine light, while others will test it anyway. Call your local DEKRA station or check your state's emissions testing rules before you go. If your state allows testing with the light on, DEKRA will test you, but you may fail if the underlying problem causes high emissions.

How long does a DEKRA emissions test take?

The test itself takes 10 to 20 minutes. Add 5 to 10 minutes for check-in and paperwork. If the station is busy, you may wait 30 minutes to an hour before your test begins. Scheduling an appointment usually reduces wait time compared to walk-ins.

Can I retest at a different company if I fail at DEKRA?

Yes, in most states you can retest at any approved facility, including another private vendor or a state-run center. Your state's emissions testing website will list all approved vendors. You will pay the retest fee again, unless your state offers a retest waiver or discount.

Does DEKRA notify my state automatically, or do I need to submit my results?

DEKRA submits your results electronically to your state within one to three business days. You do not need to do anything — the result appears in your state's system automatically. You can verify this by checking your vehicle registration status online through your state's motor vehicle department.