What STAR Certification Means for Your Smog Test
STAR stands for Smog Check Referee information Program, and it's California's quality-control system for smog test stations. A STAR-certified station has passed state inspections and meets strict equipment and technician standards. If your vehicle failed a regular smog test, you can take it to a STAR station for a second opinion — and that retest result is what the state will accept, regardless of the first result.
STAR stations are not optional; they're your only legal path forward if your car failed at a regular station. You cannot straightforward go to another regular station and hope for a different outcome. The state designed STAR specifically to resolve disputes and catch testing errors.
Key Takeaways
- STAR stations are referee facilities run by the California Bureau of Automotive Repair, and you can only use one after a failed smog test at a regular station.
- You must bring your failed test report and vehicle registration to the STAR station; the failed result does not automatically transfer.
- The STAR retest fee is set by the state and is the same at every certified station, though you pay it whether you pass or fail.
- Find your nearest STAR station through the Bureau of Automotive Repair's online locator or by calling your local referee office directly.
- The STAR retest result overrides your original failed test, so if you pass at STAR, you have met your smog requirement.
How to Locate a STAR Station in Your Area
The Bureau of Automotive Repair maintains an online directory of all STAR stations by county. Go to the BAR website (bar.ca.gov) and use their referee station locator tool. You can search by zip code or county, and the tool will show you the station address, phone number, and hours.
If you prefer to call, contact your county's referee office directly. The BAR website lists phone numbers for each county's office. Staff can tell you which stations are currently accepting STAR retests and may be able to book an appointment for you over the phone.
STAR stations are typically run by independent repair shops or automotive service centers that have met state certification requirements. They are not affiliated with the regular smog stations where you failed, and they operate under different oversight.
What You Need to Bring to Your STAR Retest
Bring your original failed smog test report, your vehicle registration, and a valid photo ID. The failed report is essential — the STAR station needs to see what emissions levels you failed on so they can run the same test and compare results.
If you've made repairs to your vehicle since the failed test, bring documentation of that work. This might include a repair invoice or work order. The STAR technician will want to know what was done, especially if the repairs were meant to address the emissions problem.
Have your vehicle's VIN (Vehicle Identification Number) ready. It appears on your registration and on the dashboard near the windshield. The STAR station will use it to verify your vehicle's model year and emissions requirements.
The STAR Retest Process and Timeline
The STAR technician will run the same emissions test that failed you at the regular station. The test itself takes about 30 minutes to an hour. You will receive a printed result on the spot.
If you pass the STAR retest, that result satisfies your smog requirement. You do not need to return to the original station or take any further action with the state. If you fail again, you will need to make repairs and can request another STAR retest, though you will pay the retest fee again.
Some STAR stations can schedule you the same day if they have availability, while others may require an appointment a few days out. Call ahead to ask about wait times and whether they accept walk-ins.
STAR Retest Fees and Payment
The state sets a standard STAR retest fee that is the same at every certified station. As of recent updates, this fee is typically in the range of $70 to $90, though the exact amount can change. Call your local STAR station to confirm the current fee before you go.
You pay the fee at the time of the test, whether you pass or fail. Most stations accept cash and card. If you fail and want to retest again, you will pay the full fee a second time.
Some stations may offer a discount if you complete repairs at their facility and then retest with them, but this is not standard across all STAR locations. Ask when you call to schedule.
What Happens If You Pass or Fail Your STAR Retest
If you pass, the STAR result becomes your official smog test record. You are done. The state will see the passing result and your vehicle registration will be updated. You do not need to notify anyone or file additional paperwork.
If you fail the STAR retest, the result is final. You will need to repair your vehicle and can request another STAR retest after repairs are complete. Keep your repair receipts and bring them to the next STAR station visit. Some stations will waive or reduce the retest fee if you had repairs done at their shop, but confirm this policy before you commit to repairs there.
A second STAR failure means your vehicle has a genuine emissions problem that requires more extensive repair. Consider having a trusted mechanic diagnose the issue before spending money on guesswork repairs.
When You Might Need a STAR Retest Beyond a Failed Test
If you believe a regular smog station made an error or used faulty equipment, you can request a STAR retest even if you have not yet registered your vehicle. Contact your county referee office and explain the situation. They can advise whether a retest is warranted and how to proceed.
If your vehicle is due for renewal and you want a second opinion before paying registration fees, some people choose to go straight to a STAR station instead of a regular station. However, this is not required — a passing result from any certified regular station is sufficient. STAR is primarily for resolving failures.
Frequently Asked Questions
Can I go to a STAR station without a failed test?
No. STAR stations are referee facilities designed specifically to retest vehicles that failed at regular stations. If your vehicle has not failed, you must use a regular smog station. Going to STAR without a failed result will not be accepted by the state.
What if the STAR station is far from my home?
You can travel to any STAR station in California, not just the one closest to you. If a nearby station has a long wait or you prefer another location, you are free to drive to a different county's STAR facility. Bring your failed test report and registration with you.
Do I need an appointment at a STAR station?
It depends on the station. Some accept walk-ins during business hours, while others require appointments. Call ahead to ask about their scheduling policy and current wait times. Booking an appointment ensures you will not have a long wait.
What if I lose my failed smog test report?
Contact the regular station where you failed and request a copy of your test results. They keep records and can print a duplicate. If you cannot reach that station, call your county referee office — they may have a record of your failed test in the state system.
Can a STAR station do repairs if I fail?
Many STAR stations are repair shops and can perform emissions repairs. However, you are not required to use them. You can take your vehicle to any mechanic you trust, get repairs done, and then return to any STAR station for a retest. Shop around for repair quotes before committing.