What STAR smog stations are and how to find one

STAR smog stations are California Department of Consumer Affairs (DCA) certified facilities that perform smog checks under the state's STAR (Smog Check Referee and Test-Only) program. They are the only places where you can get a smog check if your vehicle has failed at a regular test-only station, or if you need a referee inspection to dispute a failed test.

To find a STAR station near you, go to the official California STAR program website at star.ca.gov and use their station locator tool. Enter your ZIP code or city name, and the system will show you certified STAR stations within your area, their addresses, phone numbers, and hours. You can also call the California Bureau of Automotive Repair (BAR) at 1-800-952-5210 to ask for STAR station locations in your region.

STAR stations are different from regular smog check stations. Regular stations test your vehicle and report the result to the state. STAR stations exist specifically to handle vehicles that have already failed, or to provide a neutral second opinion when you believe a test result was wrong. Not every smog check station is a STAR station, so you cannot straightforward go to any station if you need a referee inspection.

Key Takeaways

  • STAR stations are certified by the California Department of Consumer Affairs and are the only places that can perform referee smog checks for vehicles that have failed.
  • You can find STAR stations near you using the locator tool at star.ca.gov or by calling the Bureau of Automotive Repair at 1-800-952-5210.
  • A STAR station is required if your vehicle failed a smog check at a regular station and you want to dispute the result or get a second opinion.
  • STAR stations charge a fee for referee inspections, which varies by station but is set by the state and typically ranges based on your vehicle type.

When you need to visit a STAR station

You need a STAR station if your vehicle failed a smog check at a regular test-only station and you want to challenge that result. The referee inspection is your formal dispute process. A STAR referee will perform the same test again, and their result becomes the official record. If the referee test shows your vehicle passes, the failed result is overturned and you will not have to repair anything.

You also need a STAR station if you own a vehicle that has been repaired after a failure and you want the repair verified before you take it back to a regular station for the official retest. Some vehicle owners choose this route to confirm the repair work was done correctly and that the vehicle will pass the regular smog check.

If your vehicle has never been tested or has passed before, you do not need a STAR station. A regular test-only smog check station is sufficient for your routine inspection.

What to bring and how the referee inspection works

Bring your vehicle registration, proof of ownership, and a valid photo ID. You will also need the failed smog check report from the regular station — the referee needs to see what test was performed and what the results were. If you cannot locate the original report, call the regular station where you failed and ask them to provide a copy or the test number.

The referee will perform the same smog test your vehicle failed. The test itself takes about 10 to 15 minutes and involves connecting your vehicle to a diagnostic machine that measures emissions. The referee will document everything and provide you with a new test report on the spot. If you pass, you are done. If you fail again, the referee will explain what emissions are out of range and what repairs may help.

The referee is neutral and works for the state, not the station. Their job is to verify whether the original test result was accurate. They cannot tell you which repair shop to use or may provide that a specific repair will fix the problem, but they can tell you which emissions are high and point you toward general repair guidance.

Fees and what to expect for cost

STAR stations charge a fee for referee inspections. The state sets a maximum fee, but the exact amount varies by station and by vehicle type. Fees typically range higher for heavy-duty vehicles and lower for standard passenger cars. Call the STAR station before you visit to ask what they charge for your vehicle type — this will help you budget and avoid surprises.

The fee covers only the referee inspection itself. If your vehicle fails the referee test and you need repairs, those costs are separate and depend on what work your vehicle needs. Repair shops are not part of the STAR program, so you will need to find and pay a repair facility on your own.

Some STAR stations may offer repair services as well, but you are never required to use their repair shop. You can take your vehicle to any repair facility you choose, or perform repairs yourself if you have the skills.

How to prepare your vehicle before a STAR inspection

Make sure your vehicle is in good running condition before you arrive. Check that your engine is not misfiring, your check engine light is off (if possible), and your fuel cap is tight. A loose or missing fuel cap can cause an emissions test failure because fuel vapors escape.

If your vehicle failed because of a check engine light, do not ignore it. The light indicates a fault code stored in your vehicle's computer. A mechanic or diagnostic tool can read that code and tell you what system is causing the problem. Many emissions failures are tied to check engine codes, so addressing the underlying issue is usually necessary before you will pass.

Bring your vehicle to the STAR station with a full fuel tank or close to full. Some smog tests are more accurate when the fuel tank is not nearly empty. Also, make sure your vehicle has been driven recently — a cold engine that has not run in days may not test accurately.

What happens after you pass or fail a STAR inspection

If you pass the referee inspection, the failed result is removed from your record and you will not need to do anything else for your smog check requirement. Your vehicle is considered compliant. You will receive a passing smog check report that you can use to register your vehicle or renew your registration with the California Department of Motor Vehicles (DMV).

If you fail the referee inspection, you have confirmed that your vehicle genuinely has an emissions problem that needs repair. At this point, you will need to take your vehicle to a repair shop. Once repairs are completed, you can return to any regular smog check station (not necessarily a STAR station) to have the vehicle retested. If it passes the regular retest, you are done. If it fails again, you can request another referee inspection if you believe the result is wrong.

Keep all your smog check reports — both the original failure and the referee result — in case the DMV asks for documentation when you renew your registration.

Frequently Asked Questions

Can I go directly to a STAR station for my first smog check, or do I have to go to a regular station first?

You must go to a regular test-only station first. STAR stations only perform referee inspections for vehicles that have already failed at a regular station. If your vehicle has never been tested, you need a regular smog check station for the initial test.

How long does a referee inspection take?

The actual test takes 10 to 15 minutes. However, you should plan for 30 to 45 minutes total, including check-in, paperwork, and receiving your results. Call ahead to ask about wait times, especially during peak inspection periods.

What if I disagree with the referee result?

The referee result is final for the purposes of the STAR program. If you believe there is a problem with the test itself, you can contact the California Bureau of Automotive Repair to file a complaint about the station or the referee. However, you cannot request another referee inspection for the same failure.

Do I need an appointment at a STAR station?

Some STAR stations accept walk-ins, while others require appointments. Call the station you plan to visit and ask about their scheduling. Having an appointment will usually get you in faster and reduce your wait time.

Can a STAR station tell me which repairs will fix my emissions problem?

The referee can tell you which emissions are out of range and may suggest general categories of repairs, but they cannot diagnose the specific repair needed or recommend a particular shop. You will need to take your vehicle to a repair facility for a full diagnostic and repair estimate.