What Speedway Smog Centers Do

Speedway Smog Centers are inspection stations that test whether your vehicle meets your state's emissions standards. They do not repair vehicles — they only test them and issue a pass or fail certificate. If your car fails, you take it to a repair shop of your choice, get the problem fixed, and return to any smog center (not necessarily Speedway) for a retest.

Speedway operates hundreds of locations across California, Nevada, and Arizona. The inspection itself takes 10 to 15 minutes and costs between $30 and $50 depending on your vehicle type and state. You will need your vehicle registration and a valid ID.

Key Takeaways

  • Speedway Smog Centers test your vehicle's emissions but do not repair it; they issue a pass or fail certificate that you present to your state's DMV or equivalent.
  • The inspection takes 10 to 15 minutes and costs $30 to $50; you need your registration and ID.
  • If you fail, you can take your vehicle to any repair shop, not just Speedway, and return to any smog center for a retest.
  • Most states require a smog test every two years or when you renew your registration, though some vehicles are exempt based on age or type.

When You Need a Smog Test

Your state's DMV or equivalent will tell you when a smog test is required. In California, most vehicles need one every two years when you renew your registration. Some states require it annually. Vehicles older than a certain age (usually 30 years or more) and some electric or hybrid vehicles may be exempt.

You cannot renew your registration without a passing smog certificate if your state requires one. The certificate is valid for a set period — usually 30 to 90 days — so time your test close to when you plan to renew.

How to Schedule and Prepare for Your Test

You can walk into most Speedway locations without an appointment, though some accept online reservations through their website. Before you go, make sure your vehicle is in decent running condition — a car that barely starts or has obvious problems may not pass the initial diagnostic scan.

Bring your vehicle registration and a valid ID. The technician will plug a diagnostic scanner into your vehicle's onboard computer port (located under the steering wheel or dashboard) and run the test. The scanner reads emissions data that your vehicle's computer has already recorded. You will receive a printed pass or fail certificate on the spot.

Understanding a Pass or Fail Result

A pass means your vehicle meets the emissions standard for your state and year. You take the certificate to your DMV or submit it online when you renew your registration. The certificate is valid for a limited time, so do not test too far in advance.

A fail means your vehicle's emissions are above the legal limit. The certificate will list which emissions component failed — usually nitrogen oxides, particulate matter, or hydrocarbons. You then take your vehicle to a repair shop (any shop, not Speedway) and have that component repaired or serviced. Once repaired, you can return to any smog center for a retest. Some states offer a second retest at no charge if you fail the first time.

What Happens If You Fail and Need Repairs

After a failed test, you have a window of time — usually 30 to 90 days depending on your state — to get repairs done and retest. During this period, you can still drive your vehicle legally; the fail certificate does not prevent you from using the car.

Take the fail certificate to a repair shop and show them which component failed. The shop will diagnose the problem and provide a repair estimate. Common failures involve the oxygen sensor, catalytic converter, or fuel system. Repair costs vary widely depending on what is wrong. Once the repair is complete, schedule a retest at any smog center. If you pass the retest, you receive a new pass certificate and can renew your registration.

Speedway Locations and Hours

Speedway Smog Centers are located throughout California, Nevada, and Arizona. You can find the nearest location and hours on the Speedway website or by calling their main line. Most locations are open Monday through Friday during business hours, with some Saturday availability. Hours vary by location, so check before you drive there.

If you cannot reach a Speedway location in time, remember that you can use any state-licensed smog center for your initial test or retest. Speedway is one option, but your state's DMV website will list other certified inspection stations in your area.

Frequently Asked Questions

Can I retest at a different smog center if I fail at Speedway?

Yes. You can take your vehicle to any state-licensed smog center for a retest, not just Speedway. The fail certificate from Speedway is valid at any other center. Some states even waive the retest fee if you return within a certain timeframe.

What if my vehicle is too old or too new to test?

Very new vehicles (usually less than four model years old) and very old vehicles (usually 30 years or older) are often exempt from smog testing in most states. Check your state's DMV website or call Speedway to confirm whether your vehicle is exempt based on its year and type.

Do I need an appointment at Speedway?

Most Speedway locations accept walk-ins, though wait times vary. Some locations offer online reservations that can reduce your wait. Call ahead or check the Speedway website for your local center's policy.

What if I move to a different state after I get my pass certificate?

A smog certificate from one state is not valid in another state. Each state has its own emissions standards and testing requirements. If you move, you will need to follow your new state's testing schedule and use a center in that state.

How long is a smog certificate good for?

A pass certificate is usually valid for 30 to 90 days, depending on your state. Check your certificate for the expiration date. You must submit it to your DMV before it expires, or you will need to retest.