Smog inspections are required unless your vehicle is:

• Hybrid
• Gasoline powered 1975 year model or older
• Diesel powered manufactured prior to 1998 or with a Gross Vehicle Weight rating (GVWR) of more than 14,000 lbs
• Electric
• Natural gas powered with a GVWR rating of more than 14,000 lbs.
• Motorcycle
• Trailer

Refer to the California DMV sit....http://dmv.ca.gov/vr/smogfaq.htm