What is the Difference between Emissions Testing and a Smog Check?
Emissions Testing vs. Smog Check
State and local mandated emissions testing meets the EPA Tier 2 standard, while smog testing meets California's higher standard for EPA Tier 3.
How Do I Know If I Need a Smog Test?
Your DMV registration renewal notice will indicate "Smog Check Required" if your vehicle needs a smog check.
When Is a Smog Check Required?
- If you are selling a car or truck that is more than four years old
- When you register an out-of-state vehicle for the first time in California, you will need a smog check
- Every other year for vehicles that are more than six years old
When Is a Smog Check Not Required?
- 100% electric-powered vehicles do not need a smog check
- Motorcycles do not need a smog check
- Got a classic car? Vehicles that are model-year 1975 and older do not require a smog check
- Vehicles six model years and newer do not require a biennial Smog check
- Selling your car? Cars that are four model years and newer do not require a change-of-ownership Smog check
- Diesel-powered trucks that are model year 1997 and older
- Diesel-powered trucks with a gross vehicle weight rating of more than 14,000 pounds
Discover More About Exhaust Repair Services At Ken's Auto Center in San Diego
Emissions And Smog Testing
Discover more about Smog Check, Testing & Repair
Inspections & Emissions
OUR REVIEWS
Michael Bullock, 04/21/2025I called Ken's to get a quote on an engine rebuild. I spoke with Todd who provided a quote which was in line with a couple other shops i spoke with. The difference was that Ken's shop mentioned that my car may be eligible for repair under an exted warranty due to know design flaws that would result in engine failure. I did this and will end up saving several thousands because the rebuild will be done as a recall repair. Ken's shop will definitely be getting my business in the future. They showed they prefer to win the trust of someone even if they miss out on making money at that time. Thank you
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