Where to take your vehicle for a smog check in San Bernardino County

You can get a smog check at any STAR station (Smog Check Test and Repair) in San Bernardino County. These are privately owned repair shops and service stations that the state has certified to perform the test. You do not have to go to a specific location — any STAR station will do, and you can search for nearby stations on the California Bureau of Automotive Repair website by entering your ZIP code.

The test itself takes about 30 minutes. Bring your vehicle registration and a valid photo ID. The technician will connect your car to a machine that measures tailpipe emissions, and you will get a pass or fail result on the spot. If you pass, the station sends the results electronically to the Department of Motor Vehicles — you do not need to do anything else.

Some stations charge a flat fee for the test only, while others bundle it with a repair package if your vehicle fails. Prices vary by location, so calling ahead to ask the cost can save you time. The state does not set a maximum price, so shops can charge what they want.

Key Takeaways

  • Any STAR station in San Bernardino County can perform your smog check; you can find one near you on the California Bureau of Automotive Repair website.
  • Bring your vehicle registration and photo ID, and plan for about 30 minutes at the station.
  • If you pass, results go directly to the DMV electronically; if you fail, you have 30 days to fix the problem and retest.
  • Your vehicle must pass a smog check every two years if it is gasoline-powered, or every four years if it is diesel-powered and newer than model year 2000.
  • Smog checks are required when you renew your registration, so you cannot complete the renewal without a passing result.

When your vehicle needs a smog check

In San Bernardino County, you need a smog check when you renew your vehicle registration with the DMV. For most gasoline-powered vehicles, that means every two years. If you own a diesel vehicle manufactured in 2000 or later, you need one every four years. Vehicles older than 1975 and electric vehicles are exempt.

The smog check requirement is tied to your registration renewal date, not to when you bought the vehicle. When your registration is about to expire, the DMV will not let you renew it online or by mail without proof of a passing smog check. You must get the test done before your registration expires, or you will be driving with an expired registration, which is a violation.

If your vehicle fails the test, you have 30 days from the test date to fix the problem and retest at any STAR station. You do not have to return to the same station. Once you pass, the station reports it to the DMV, and you can then complete your registration renewal.

What happens if your vehicle fails the smog check

A failing result means your vehicle's emissions are above the legal limit for your model year. The test report will show which emissions are too high — usually nitrogen oxides, particulates, or hydrocarbons. This tells a mechanic where to start looking for the problem.

Common reasons for failure include a faulty oxygen sensor, a loose gas cap, a clogged air filter, or a malfunctioning catalytic converter. Some fixes are inexpensive (a new gas cap costs under $20), while others are costly (a catalytic converter replacement can run $800 to $2,000). Many STAR stations offer repair services, but you can also take your vehicle to any mechanic you trust.

After repairs, you must retest within 30 days. If you retest at a different station, bring your original failing test report — some stations offer a reduced retest fee if you show proof of the earlier failure. Once you pass the retest, the new result goes to the DMV, and you can renew your registration.

How to renew your registration after passing the smog check

After you receive a passing smog check result, the STAR station sends it electronically to the DMV. You do not need to print anything or carry paperwork. Within a few days, you can renew your registration online at the DMV website, by mail, or in person at a local DMV office in San Bernardino County.

To renew online, go to dmv.ca.gov, select "Renew Registration," and follow the prompts. You will need your vehicle registration number and driver's license number. The online renewal takes about 10 minutes, and you can pay the renewal fee by credit card or debit card. Your new registration tags will arrive by mail within two to three weeks.

If you prefer to renew in person, bring your current registration, proof of insurance, and a valid ID to any DMV office. San Bernardino County has multiple locations, including offices in San Bernardino, Ontario, Victorville, and Barstow. You can check wait times and make an appointment on the DMV website before you go.

Understanding smog check test standards in California

California's smog check test measures how much pollution your vehicle produces. The test connects to your vehicle's onboard diagnostic system and reads emissions data, then compares it to the standard for your vehicle's model year and engine type. Newer vehicles have stricter standards than older ones because emission control technology has improved.

The test does not measure how your car drives or whether it feels like it is running well. A vehicle can feel fine but still fail because emissions are slightly over the limit. Conversely, a vehicle with a check engine light might pass if the emissions themselves are within range — though a check engine light usually means something needs attention.

San Bernardino County is part of the South Coast Air Quality Management District, which enforces California's emission standards. The standards are the same across the state, so a vehicle that passes in San Bernardino will pass anywhere in California.

Finding a STAR station and comparing costs

The California Bureau of Automotive Repair maintains a searchable database of all certified STAR stations. Go to bar.ca.gov, click "Find a STAR Station," enter your ZIP code, and you will see a list of nearby locations with addresses and phone numbers. The database shows whether each station does test-only or test-and-repair services.

Call ahead to ask the test-only price. Prices vary widely — some stations charge $30 to $50 for a test, while others charge $70 or more. If your vehicle fails and you want repairs done at the same station, ask about the total cost for diagnosis and repair before you agree. Some stations offer package deals; others charge separately for each service.

You are not required to use the same station for repairs and retesting. If a station's repair estimate seems high, you can take your vehicle to an independent mechanic, then return to any STAR station for the retest. This gives you flexibility to find the best price for repairs.

Frequently Asked Questions

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

No. The smog check machine will not complete the test if the check engine light is illuminated. You must have the problem diagnosed and fixed first, then clear the light before you can test. A mechanic can read the diagnostic code to find the issue.

What if I just moved to San Bernardino County from out of state?

If you are registering a vehicle in California for the first time, you need a smog check before you can get a California registration. Bring your out-of-state title and registration, proof of insurance, and a photo ID to the DMV, along with your passing smog check result. The DMV will issue your California registration.

How long does a smog check result stay valid?

A passing smog check result is valid for 30 days. If you do not renew your registration within that window, you will need another smog check. Plan to get your test done within two weeks of your registration expiration date to give yourself time to handle any issues.

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

Yes, if your vehicle is subject to smog testing (gasoline-powered cars every two years, diesel cars every four years). The DMV will not issue new tags without proof of a passing smog check. The only exception is if your vehicle is exempt due to age or fuel type.

What if the STAR station says my vehicle cannot be tested?

Some vehicles cannot be tested if they are too new (less than four model years old), too old (before 1975), or have a severe mechanical problem that prevents the test from running. Ask the technician what the specific issue is. If your vehicle is new enough to require testing but cannot be tested, contact the DMV for guidance on next steps.