Where to find a smog check station

You can get a smog check at any Bureau of Automotive Repair (BAR) certified smog station in California. These are private businesses — repair shops, service stations, and dedicated smog-check-only facilities — that the state has licensed to perform the test. You do not go to the DMV or a government office.

The fastest way to find a nearby station is the BAR's official station locator at bar.ca.gov/consumer-information/smog-check. You enter your ZIP code and see all certified stations within a radius, along with their hours and phone numbers. You can also search "smog check near me" in Google Maps, though not every result will be BAR-certified, so verify the station's license before you go.

Prices vary by location and station. A basic smog check typically costs between $30 and $80, depending on your vehicle type and whether the station charges a diagnostic fee if your car fails. Call ahead to ask the price and whether you need an appointment — some stations take walk-ins, others require one.

Key Takeaways

  • Smog checks are performed only at BAR-certified private stations, not at government offices or the DMV.
  • Use the BAR's station locator at bar.ca.gov to find certified stations in your area with current hours and phone numbers.
  • The test costs between $30 and $80 depending on your vehicle and the station; call ahead to confirm the price and whether an appointment is needed.
  • Bring your vehicle registration and proof of current vehicle insurance to the station.
  • If your car fails, you have 30 days to repair it and return to any BAR-certified station for a retest at no additional fee.

What documents and information to bring

Bring your vehicle registration and proof of current vehicle insurance. The station needs the registration to confirm your vehicle's make, model, year, and VIN. Insurance proof shows you are legally allowed to drive the vehicle. If you do not have the physical registration card, a photo or digital copy on your phone is usually acceptable — call the station first to confirm.

Have your keys ready and be prepared to stay while the test runs. The actual smog check takes 10 to 30 minutes depending on whether your vehicle is a 1975 or older model (visual inspection only), a 1976–1999 model (OBD-I test), or 2000 and newer (OBD-II test). The station will plug a diagnostic scanner into your vehicle's onboard diagnostics port to read emissions data.

What happens if your vehicle fails

If your car fails the smog check, you receive a Smog Check Inspection Report that lists the specific emissions systems that did not meet standards. This report is not a repair order — it tells you what failed, not how to fix it. You have 30 days from the test date to repair your vehicle and return to any BAR-certified station for a retest.

The retest is free if you return within 30 days. You do not have to return to the same station. When you go back, bring the original failed inspection report and your registration. If the vehicle passes the retest, the station submits the passing result to the DMV electronically, and you are done. If it fails again, you have another 30 days to repair and retest.

If you cannot afford the repairs, some counties offer Smog Abatement Program information for low-income vehicle owners. Contact your county's air quality management district to learn whether your county has a repair subsidy program and what income limits explore.

When you need a smog check

California requires a smog check when you register a vehicle for the first time in the state, renew registration every two years (for most vehicles), or transfer ownership to a new owner. Vehicles that are exempt include those registered as classic cars, vehicles powered entirely by electricity, and some newer low-emission vehicles — the DMV notice you receive will tell you whether your vehicle needs one.

You must complete the smog check before you go to the DMV to register or renew. The station submits the passing result directly to the DMV's system, so you do not need to bring a paper copy. If you go to the DMV without a passing smog check result in the system, your registration will be delayed.

How to read your smog check results

A passing smog check shows that your vehicle's emissions are within legal limits for its model year. The station submits this electronically to the DMV within one business day. You receive a printed receipt showing the test date, your vehicle's information, and the word "PASS." You do not need to bring this to the DMV — the result is already in their system — but keep it for your records in case there is a delay.

A failed smog check lists the specific emissions systems that exceeded limits, such as "NOx (nitrogen oxides) high" or "Particulate matter high." The report does not diagnose the cause — that requires a mechanic. Common reasons for failure include a faulty oxygen sensor, a loose gas cap, a failing catalytic converter, or engine problems. A mechanic can read the diagnostic trouble codes to pinpoint the issue.

Choosing between a smog station and a repair shop

Some repair shops are BAR-certified to perform smog checks, while others are not. A repair shop that is certified can test your vehicle and, if it fails, perform repairs and retest you in one place. A dedicated smog-check-only station tests your vehicle but does not repair it — if you fail, you take your car to a mechanic elsewhere.

Using a certified repair shop can be convenient if you know your car needs repairs, because the shop can diagnose and fix the problem and retest you without you having to drive to two locations. However, some repair shops may recommend unnecessary repairs to pass the test. If you are unsure whether a repair is needed, get a second opinion from another mechanic before authorizing work.

A dedicated smog-check-only station is a good choice if you want an independent test without pressure to buy repairs. These stations are typically faster and cheaper because they do not perform repairs.

What to do if you move out of state

If you move to another state, you do not need a California smog check for your new state's registration. Each state has its own emissions testing rules, and most states outside California do not require smog checks at all. When you register your vehicle in your new state, follow that state's DMV requirements, which you can find on the state's DMV website.

If you move back to California later, you will need a smog check to register your vehicle again in California, even if your vehicle passed a test in another state.

Frequently Asked Questions

Can I get a smog check if my vehicle has a check engine light on?

No. If your check engine light is on, the vehicle will fail the smog check because the onboard diagnostics system is signaling a problem. You must have a mechanic diagnose and repair the issue first, then clear the diagnostic trouble codes. After that, you can return to a smog station for the test.

How long does a smog check result stay valid?

A passing smog check result is valid for 30 days. You must complete your vehicle registration or transfer within that window. If 30 days pass without registration, you will need a new smog check.

What if I fail the smog check twice?

You have 30 days from the second failed test to repair and retest again. If you fail a third time, you may be required to contact your county's air quality management district to discuss repair options or information programs before you can retest.

Do I need a smog check if I am only renewing my registration online?

Yes, if your vehicle requires a smog check. The DMV will not allow you to complete online renewal without a passing smog check result already in their system. You must get the test done first, then renew online or at the DMV.

Can I get a smog check for a vehicle I do not own?

Yes. You can take someone else's vehicle to a smog station if you have the registration and proof of insurance. The station tests the vehicle, not the owner. This is common when someone is helping a family member or friend get a smog check.