What is the Difference between Emissions Testing and a Smog Check?

XPRESS AUTO CARE > Top Level Auto Repair & Maintenance Services > SMOG TESTING AND REPAIR > SMOG TESTING VS. EMISSIONS TESTING

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

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