Every California smog check term and question, plainly defined

Do diesel trucks need smog check in California?

Yes — diesel trucks from the 1998 model year and newer need a smog check.

Per BAR diesel inspection requirements.

This entry also has a full Q&A treatment: smoganswers.com/q/do-diesel-trucks-need-smog-check-in-california/

View in the A–Z glossary →

Last reviewed 2026-05-25 · Cal Smog Network canonical answer library