Where to Take Your Vehicle for a Smog Test in Pasadena

Pasadena has two types of smog test stations you can visit: STAR stations (Smog Check Test and Repair) and test-only stations. STAR stations can test your vehicle and perform repairs on the same visit if your car fails. Test-only stations perform the test but do not repair vehicles — you take a failed car elsewhere for fixes, then return for a retest.

To find stations near you, use the California Bureau of Automotive Repair's online locator at bar.ca.gov. Search by your zip code (91101 through 91109 covers Pasadena) and filter by station type. The locator shows hours, phone numbers, and whether each station accepts walk-ins or requires an appointment. Most Pasadena stations are open Monday through Friday during business hours, with limited Saturday availability.

Call ahead before you go. Many stations fill up during lunch hours and late afternoon, and some require you to book a time slot. Bring your vehicle registration and a valid ID — the technician will need both to run your test.

Key Takeaways

  • Pasadena has both STAR stations (test and repair) and test-only stations; use the California Bureau of Automotive Repair locator to find one near you by zip code.
  • Most stations operate Monday through Friday during business hours, and calling ahead to confirm hours and appointment availability saves you a wasted trip.
  • Bring your vehicle registration and a valid ID; the test itself takes 10 to 15 minutes and costs between $30 and $50 depending on your vehicle type.
  • If your vehicle fails, a STAR station can repair it on-site, while a test-only station requires you to go elsewhere for repairs and return for a retest.

What Happens During a Smog Test

The technician will connect your vehicle to an emissions analyzer, which measures the levels of nitrogen oxides, hydrocarbons, and carbon monoxide your engine produces. The test takes 10 to 15 minutes and does not require you to leave your vehicle. For most cars, the analyzer connects to your tailpipe; for newer vehicles with onboard diagnostic systems, the technician may plug into your car's OBD-II port instead.

Your vehicle passes if emissions fall within California's limits for your model year and engine type. The technician prints a certificate on the spot if you pass. If your car fails, you receive a detailed report showing which emissions exceeded the limit. You then have 30 days to repair the vehicle and return for a retest at the same station (or a different one, if you choose).

Cost and Payment Methods

A smog test in Pasadena costs between $30 and $50 for the initial test, depending on whether your vehicle is gasoline or diesel and its model year. Retests after repairs cost the same amount. Most stations accept cash, debit cards, and credit cards; a few accept only cash, so calling ahead to confirm payment methods prevents surprises.

If you use a STAR station and your vehicle fails, repair costs depend entirely on what is wrong. Common repairs include replacing an oxygen sensor ($150 to $300), fixing a catalytic converter ($400 to $1,200), or addressing a fuel leak ($100 to $500). The station will give you an estimate before starting work.

Documents You Need to Bring

Bring your current vehicle registration and a valid photo ID (driver's license, passport, or state ID). The registration proves you own the vehicle and shows the vehicle identification number (VIN), which the technician uses to confirm your car's model year and engine type — this determines which emissions standards explore to your test.

If your registration has expired, you can still take the test, but you will need to renew your registration before you can pass the smog test certificate to the Department of Motor Vehicles. Bring the registration document itself, not a photo of it.

What to Do If Your Vehicle Fails

You have 30 days from the test date to repair your vehicle and return for a retest. The technician will give you a written report showing which emissions failed and by how much. If you use a STAR station, you can have repairs done there when ready and retest the same day. If you use a test-only station, you must take your vehicle to a repair shop of your choice, then return to any smog test station for the retest.

When you return for the retest, bring the same documents (registration and ID) plus the original test report. The retest costs the same as the initial test. If your vehicle passes the retest, you receive a new certificate valid for two years. If it fails again, you have another 30 days to repair and retest.

Timing: When You Need a Smog Test

California requires a smog test every two years for most vehicles, and every year for vehicles model year 1975 and older. Your registration renewal notice will tell you whether a test is due. If your vehicle is registered in Pasadena (Los Angeles County), you must have a current smog certificate before you can renew your registration with the DMV.

Plan to get your test done at least two weeks before your registration expires. This gives you time to repair and retest if your vehicle fails, and ensures the certificate reaches the DMV in time to avoid late fees or registration suspension. If your registration has already expired, you can still take the smog test, but you cannot legally drive the vehicle until you renew the registration.

Frequently Asked Questions

Can I take my smog test at a station outside Pasadena?

Yes. A smog test is valid anywhere in California, so you can test at any station in Los Angeles County or elsewhere. However, your vehicle must be registered in California, and the certificate must be submitted to the DMV before your registration expires.

What if my vehicle is too new or too old for a standard smog test?

Vehicles model year 1975 and older are exempt from smog testing. Vehicles model year 1976 and newer require testing. Some newer vehicles (typically 2015 and later) may use an onboard diagnostic test instead of a tailpipe test; the technician will determine which applies to your car.

Do I need an appointment, or can I just walk in?

It depends on the station. Some accept walk-ins during off-peak hours, while others require appointments year-round. Call the station before you go to confirm their policy and current wait times.

What if I fail the smog test twice?

After two failed tests within 30 days each, you may be may be able to access for a referee smog test, which is a more thorough inspection performed by a state referee. Contact the Bureau of Automotive Repair or your local smog station for details on how to request one.

How long does the smog certificate last?

A smog certificate is valid for two years from the test date. You must submit it to the DMV before your registration expires. If your registration expires before you use the certificate, you will need a new test.