What Sacramento's Smog Certification Requires

Sacramento requires a smog certification (also called a smog check) for most vehicles registered in the county, and you'll need to pass it before you can renew your registration. The test measures your vehicle's exhaust emissions to confirm it meets California's air quality standards. You cannot complete your registration renewal without a passing certificate, and the test must be performed at a Bureau of Automotive Repair (BAR) certified smog station.

The test itself takes about 10 to 30 minutes and costs between $30 and $80 depending on the station and your vehicle type. You'll need your vehicle's current registration and proof of ownership (title or registration document). The smog station will test your tailpipe emissions and, for some vehicles, run a diagnostic scan of your vehicle's onboard computer system.

Once you pass, the station issues a certificate valid for 90 days. You must submit this certificate to the California Department of Motor Vehicles (DMV) before your registration expires, either online, by mail, or in person at a DMV office.

Key Takeaways

  • Sacramento requires a smog certification every two years for most vehicles, and you cannot renew your registration without a passing certificate.
  • The test costs $30 to $80 and takes 10 to 30 minutes at any BAR-certified smog station in Sacramento County.
  • A passing certificate is valid for 90 days, so you should schedule your test close to your registration renewal date.
  • You must bring your current registration and proof of ownership to the smog station.
  • After you pass, submit your certificate to the DMV online, by mail, or in person before your registration expires.

Which Vehicles Need Smog Certification in Sacramento

Most passenger vehicles registered in Sacramento County must pass a smog test every two years. The requirement applies to vehicles that are at least four model years old. For example, if the current year is 2024, vehicles from 2020 and older must be tested.

Some vehicles are exempt. These include vehicles that are less than four model years old, motorcycles, vehicles with a Gross Vehicle Weight Rating (GVWR) over 14,000 pounds, and vehicles that are registered as non-operational or have a disabled person placard. Diesel vehicles have different testing requirements than gasoline vehicles, so confirm your vehicle type with the smog station when you call.

If you're unsure whether your vehicle needs certification, check your registration renewal notice from the DMV—it will state whether a smog test is required. You can also call a local BAR-certified station and provide your vehicle's year, make, and model.

Finding a BAR-Certified Smog Station in Sacramento

You must use a station certified by the Bureau of Automotive Repair. The official BAR station locator is available on the California Department of Consumer Affairs website. Search by your ZIP code or city name to see all certified stations near you, along with their hours and phone numbers.

Call ahead before you visit. Ask about wait times, whether they accept your vehicle type (some stations specialize in certain makes or have equipment for diesel vehicles), and their current price. Many stations accept walk-ins, but calling first saves you a trip if they're busy or temporarily closed.

Bring your current registration and proof of ownership. If your vehicle fails the test, the station will provide a written report explaining what failed and what repairs are needed. You can then take your vehicle to a repair shop, return to the same station for a retest, or visit a different BAR-certified station.

What Happens If Your Vehicle Fails the Smog Test

A failed test means your vehicle's emissions exceed California's limits. The smog station will give you a detailed report showing which emissions standards your vehicle did not meet. This report is yours to keep and take to a repair shop.

You have two options after a failure. You can repair your vehicle and return to any BAR-certified station for a retest (you do not have to return to the same station). Or, if your vehicle is older and repairs are expensive, you may be may be able to access for the Consumer information Program (CAP), which can help pay for repairs or, in some cases, help you replace an older vehicle. Contact the Sacramento Air Quality Management District to learn whether your vehicle qualifies.

If you cannot afford repairs and do not may have access to for CAP, your registration renewal will be delayed until you pass the test or your vehicle is retired from service. Plan ahead: if your vehicle is aging or has had past emissions issues, schedule your smog test well before your registration expires so you have time to address any failures.

Submitting Your Passing Certificate to the DMV

Once you receive your passing certificate from the smog station, you have 90 days to submit it to the DMV. The certificate includes a barcode and your vehicle information. You can submit it three ways: online through the DMV website, by mail to the address on the certificate, or in person at any DMV office.

The online option is fastest. Visit the California DMV website, select "Renew Registration," and follow the prompts to upload your certificate or enter the barcode number. If you mail it, include the certificate with your registration renewal form and payment. Processing by mail typically takes two to three weeks.

If you submit your certificate after your registration expires, you may face late fees or penalties. Check your registration renewal notice for the exact expiration date and plan to submit your certificate at least one week before that date.

Timing Your Smog Test and Registration Renewal

Schedule your smog test close to your registration renewal date, but not so early that your certificate expires before you can submit it to the DMV. Since the certificate is valid for 90 days, test within two to three weeks before your registration expires.

Your registration renewal notice from the DMV will show your expiration date. If you lose this notice, log into your DMV account online or call the DMV to confirm when your registration expires. Plan backward from that date: if your registration expires on June 30, schedule your smog test for early to mid-June.

If you test too early and your certificate expires before you submit it, you'll need to test again. If you wait until after your registration expires, you cannot legally drive your vehicle and may face fines if stopped by law enforcement.

Frequently Asked Questions

Can I get a smog test if my vehicle is not currently registered?

Yes. You can test an unregistered vehicle at a BAR-certified station. Bring proof of ownership (title or bill of sale). However, you cannot legally drive an unregistered vehicle to the station, so you'll need to tow it or arrange transport.

What if I move out of Sacramento County before my registration expires?

If you move to another California county, you'll need to follow that county's smog requirements, which may differ. If you move out of California, you do not need a California smog certificate. Contact the DMV in your new state or the California DMV for guidance on transferring your registration.

How much does a smog test cost in Sacramento?

Prices range from $30 to $80 depending on the station and your vehicle type. Call ahead to confirm the price. Some stations offer discounts for seniors or low-income drivers, so ask when you call.

What if the smog station loses my certificate?

The station should provide you with a paper copy and also submit the results electronically to the DMV. If you lose your paper copy, contact the station and ask them to reissue it or confirm that the results were submitted to the DMV. You can also check your DMV account online to see if the certificate has been recorded.

Do I need a smog test every year?

No. Most vehicles in Sacramento require a smog test every two years, not annually. Your registration renewal notice will state the frequency required for your specific vehicle. Some older vehicles or vehicles with past failures may require annual testing.