What happens when your car fails a smog check in California

If your vehicle fails a California smog inspection, you have two paths forward: repair the car to pass a retest, or use the state's Smog Repair Program (also called the Smog Check Repair information Program) to cover some or all of the repair costs. The program exists because certain repairs—like catalytic converter replacement or oxygen sensor work—can cost hundreds of dollars, and the state recognizes that cost alone can prevent people from bringing their cars into compliance.

The program is not automatic. You must find a participating repair shop, get a diagnosis, and then request reimbursement from the Bureau of Automotive Repair (BAR). The amount you receive depends on your household income and the type of repair needed. Some repairs have a cap on what the program will pay; others are fully covered for low-income vehicle owners.

You do not need to be a California resident to use this program, but your vehicle must be registered in California and must have failed a smog check within the past 30 days.

Key Takeaways

  • The Smog Repair Program reimburses repair costs at a participating shop, but only if you explore within 30 days of your failed smog test.
  • Your household income determines how much the program covers—lower income means higher reimbursement, up to 100 percent of the repair cost for some repairs.
  • You must use a BAR-certified repair shop and get a diagnosis before you can request reimbursement.
  • The program covers specific repairs tied to smog failures, such as catalytic converters, oxygen sensors, and fuel system work, but not routine maintenance or general repairs.
  • You submit your claim to the Bureau of Automotive Repair with your failed smog test report, the repair invoice, and proof of income.

Income levels and reimbursement amounts

California bases reimbursement on your household income as a percentage of the state median income (SMI). The program has three tiers. If your household income is below 150 percent of SMI, you may receive up to 100 percent reimbursement for covered repairs. Between 150 and 225 percent of SMI, you may receive up to 75 percent. Between 225 and 300 percent of SMI, you may receive up to 50 percent.

These percentages are maximums, not guarantees. The actual amount depends on the repair type and the cost. Some repairs have a set cap—for example, a catalytic converter replacement may be capped at a specific dollar amount even if the actual repair cost more. You can contact the Bureau of Automotive Repair or ask a participating repair shop for the current income thresholds and repair caps, as these are updated annually.

You will need to provide proof of household income when you submit your claim. Acceptable documents include recent tax returns, pay stubs, or a letter from your employer stating your income.

Which repairs the program covers

The Smog Repair Program covers repairs directly tied to your smog test failure. Common covered repairs include catalytic converter replacement, oxygen sensor replacement, fuel injector cleaning or replacement, evaporative emission system repairs, and engine control module (ECM) reprogramming or replacement.

The program does not cover routine maintenance (oil changes, air filter replacement), general repairs unrelated to the smog failure, or repairs to systems that did not cause the failure. If your car failed because of a faulty oxygen sensor but also needs new brake pads, the program covers the sensor but not the brakes.

Your repair shop should be able to tell you whether a specific repair is covered before you authorize the work. If you are unsure, contact the Bureau of Automotive Repair directly at 1-800-622-7233 or check their website for the current list of covered repairs and cost caps.

How to find a participating repair shop

Not all repair shops participate in the Smog Repair Program. You must use a shop certified by the Bureau of Automotive Repair. The BAR maintains a searchable directory of certified shops on its website (bar.ca.gov). You can search by zip code or shop name to find locations near you.

When you contact a shop, tell them you want to use the Smog Repair Program. They should be familiar with the process and able to walk you through the next steps. Some shops may require you to pay upfront and then submit the claim yourself, while others may handle the claim submission on your behalf. Ask about their process before you authorize any work.

If you cannot find a participating shop nearby, or if you have trouble locating one, the Bureau of Automotive Repair can provide referrals by phone or through their website.

The timeline from failure to reimbursement

You have 30 days from your failed smog test to submit a claim to the Bureau of Automotive Repair. This is a hard important date. If you miss it, you lose the right to reimbursement for that failure.

The repair itself does not have to happen within 30 days—only the claim submission. However, most people repair their car and then submit the claim with the repair invoice. The typical timeline looks like this: you fail the smog test (day 1), find a participating shop and schedule the repair (days 2–7), get the repair done (days 8–14), and submit your claim with the invoice and proof of income (days 15–30).

After you submit your claim, the Bureau of Automotive Repair reviews it and processes reimbursement. This can take several weeks. You will receive a check or direct deposit depending on how you submitted your claim. During this time, you can retake your smog test to confirm the repair worked, though you do not have to wait for reimbursement to do so.

What documents you need to submit

To claim reimbursement, gather these documents before you contact the Bureau of Automotive Repair:

  • Your original failed smog test report (the one issued by the smog station)
  • The repair invoice from the certified shop, showing the repair performed and the total cost
  • Proof of household income (tax return, pay stubs, or employer letter)
  • Your vehicle registration or proof of California registration
  • A completed claim form (available from the BAR website or by phone)

Make copies of everything before you submit. You can mail your claim to the Bureau of Automotive Repair or submit it online through their website. The BAR will confirm receipt and provide you with a claim number for tracking.

If any document is missing or unclear, the BAR will contact you to request it. Having everything ready upfront speeds up the process.

What to do if your repair does not fix the smog failure

If you complete a covered repair and your car still fails the smog test, you have options. First, return to the repair shop and ask them to diagnose why the repair did not work. Sometimes a related component also needs replacement, or the original diagnosis was incomplete.

If the shop performed the repair correctly but the car still fails, you may be able to claim reimbursement for a second repair. Contact the Bureau of Automotive Repair to explain the situation. They will review your case and may cover a follow-up repair if it is determined to be necessary and related to the original failure.

If repairs exceed the program's cost cap or your income level does not may have access to you for full reimbursement, you are responsible for the remaining balance. Some shops offer payment plans or financing for out-of-pocket costs.

Frequently Asked Questions

Can I use the Smog Repair Program if I already paid for the repair myself?

Yes. You can submit a claim for reimbursement even if you already paid the repair shop. Include your paid invoice and the other required documents with your claim. The reimbursement amount is based on the same income and repair-type rules as if the program had paid the shop directly.

What if I cannot afford the repair even with the program's reimbursement?

If the program's maximum reimbursement still leaves you with a large out-of-pocket cost, ask the repair shop about payment plans or financing options. Some shops work with lenders to spread payments over time. You can also contact local nonprofits or community action agencies in your area—some offer additional repair information for low-income vehicle owners.

Do I have to retake the smog test after the repair?

You do not have to retake it to claim reimbursement, but you do need to retake it eventually to clear your vehicle's smog check status and renew your registration. Most people retake the test within a week or two of the repair to confirm it worked. If the car fails again, you can pursue a second repair claim.

What if I lost my failed smog test report?

Contact the smog station where you took the test and request a copy. Provide your vehicle identification number (VIN) and the date you took the test. The station should be able to print or email you a duplicate report. If you cannot locate the original station, the Bureau of Automotive Repair may be able to help you track it down.

Can I use the program if my vehicle is registered out of state but I live in California?

No. Your vehicle must be registered in California to use the Smog Repair Program. If you are a California resident with an out-of-state registration, you will need to register the vehicle in California before you can claim reimbursement.