Smog Check FAQs
Do you have questions about your upcoming smog test or smog testing in general? You’re not alone. Below, we answer several commonly asked questions about auto emissions testing.
Q: Which vehicles qualify for smog testing or emissions testing exemptions?
A: All vehicles must be smog tested except hybrids, electric vehicles, gasoline-powered vehicles made in 1975 or before, diesel vehicles with a gross vehicle weight rating of more than 14,000 pounds that were manufactured in 1997 or before, and natural gas vehicles weighing more than 14,000 pounds. Motorcycles, trailers and other non-car vehicles do not need to be smog tested. Ask your local smog testing center if you have questions about your specific vehicle and whether it needs to have emissions testing services performed.
Q: Is there financial assistance available if I can’t afford my smog repairs?
A: Yes. The Consumer Assistance Program (CAP) helps low-income car owners by offering $1,000 to $1,500 to those who want to retire their old vehicles and qualify for the program. The program also helps car owners afford repairs on their auto emissions systems so they can meet the smog check inspection requirements. To see if you qualify, visit bar.ca.gov, fill out the CAP application form at bar.ca.gov/caponline or call (800) 952-5210 for more information.
Q: I’m buying a used car. Who has to perform and pay for the DMV smog inspection?
A: When you buy a used car, the seller is responsible for providing you with a valid smog inspection certificate. You should note that cars newer than four years old and powered by gasoline are not required to be smogged or have a smog certification when ownership is transferred.
Q: What are STAR smog stations and how are they different from other auto emissions testing centers?
A: The STAR Program is the new smog check program that replaced the Gold Shield Test-Only Program in 2013. STAR stations are smog check stations that are more closely monitored by the Bureau of Automotive Repair (BAR) and are required to meet its high standards. The DMV requires some vehicle owners to have their smog checks and/or repairs performed at a STAR station. If so, you must go to a STAR Test & Repair Station for your auto emissions testing and repairs. You’ll know that a station is a STAR station if it has the official State of California STAR logo.
Q: How much does a smog check cost?
A: Each shop sets its own rates, except for the state certification fee of $8.25. Consumers can expect to pay between $29.95 and $59.95 (plus tax and the state certificate fee) for a smog check. Some smog centers offer coupons, but as with any business, beware of shops that offer rates that are much lower than their competitors.
Q: What do I do if my car fails the smog inspection?
A: You can have your vehicle diagnosed and repaired at a test and repair smog station. For more information or to set up an appointment with a smog referee, contact the Bureau of Automotive Repair at (800) 622-7733 or online at bar.ca.gov.
Q: What are test-only smog stations and why would the DMV require me to go to one?
A: Smog test-only stations are vehicle emissions test centers that only perform testing. They’ll test your vehicle and advise you to visit a certified test and repair smog center for any needed repairs. Some consumers feel safer having their smog certification tests done at a test-only station because they avoid the appearance of a conflict of interest because they don’t perform repairs. The DMV may require consumers with gross polluter vehicles, high emitter profiles and other issues to visit a test-only station for their auto emissions test.
Q: What should I take with me to my smog check appointment?
A: For registration renewals, all you need to take with you is your vehicle, your DMV registration renewal notice and a form of payment. For smog checks on vehicle transfers, you’ll also want to bring your auto registration documentation.
Q: How often do I have to take in my vehicle for a smog test?
A: Smog testing or car emissions testing is required every other year on all vehicles that are more than four years old. You also need to have a smog test done if you’re selling your vehicle.
Q: How can I make sure my vehicle passes the smog emissions testing?
A: Regular vehicle maintenance is the best way to help your car or truck pass smog testing. Tampering with the emissions hardware can make your car fail, so avoid aftermarket changes to your vehicle emissions system. Experts also recommended making sure your “check engine” light isn’t on (while that won’t guarantee a failing grade, it can signify a problem with the emissions system), perform an oil change if needed, properly inflate your vehicle’s tires, drive your car at highway speeds for two weeks before your smog test (short trips can make emissions systems less effective), make sure your coolant and gas tanks are full, visit your vehicle emissions testing center on a clear day (rainy days and high humidity can cause false failure readings), use a fuel additive to clean your engine, and get a pre-inspection if you’re worried about failing.
Q: Why choose a Diamond Certified auto smog check center?
A: Diamond Certified helps you choose a smog check center with confidence by offering a list of top rated local companies that have passed the country’s most in-depth rating process. Only auto smog check centers rated Highest in Quality and Helpful Expertise® earn the prestigious Diamond Certified award. Most companies can’t pass the ratings. American Ratings Corporation also monitors every Diamond Certified company with ongoing research and ratings, and your purchase is always backed by the Diamond Certified Performance Guarantee, so you’ll feel confident choosing a Diamond Certified auto smog check center.
