Which of the following vehicles are exempt from Smog Inspection?

• A. 1998 and newer light-duty diesels
• B. 1975 and older gasoline vehicles
• C. All of the above
• D. None of the above

Answer: (C)

Smog inspection requirements in California exclude certain vehicles from the routine test. The program targets vehicles that contribute most to emissions, so very old cars and some newer diesel models aren’t included in the standard check. Gasoline-powered vehicles built in 1975 and earlier are exempt because they were produced before current emission controls were established. Likewise, light-duty diesel vehicles from 1998 and newer are exempt from the standard Smog Check, since diesel testing uses different procedures and scopes. Because both of these groups are not required to undergo the usual inspection, the correct answer is that all of the above are exempt.