Frequency Timing

• Do collector cars need a smog check?Pre-1976 gas exempt.
• Do I need a smog check for a family transfer?Exempt parent spouse child sibling grandparent grandchild.
• Do I need a smog check when selling my car?Seller responsible if over 4 years old.
• How long is a California smog certificate valid?90 days from inspection.
• How often do I need a smog check in California?Every two years for most vehicles.
• How soon after buying a car do I need to smog it?New owner needs valid cert within 10 days of registration.
• I just moved to California — do I need a smog check?Yes within 20 days of residency.
• When do I need a smog check for registration renewal?DMV notice will specify.