What to know — Classics smog rules in California
Are classic and vintage cars exempt from California smog? Vehicles manufactured before 1976 are fully exempt from California smog inspection. Vehicles from 1976 through 1995 receive a tailpipe gas analysis with visual inspection — no OBD scan. Vehicles from 1996 onward use the standard OBD-II protocol regardless of age.
- Pre-1976 exemption is based on model year, not calendar age — a 1975 vehicle remains exempt permanently.
- 1976-1995 vehicles get a tailpipe sniff test (CO, HC, NOx limits) plus visual inspection of emission components — no OBD port was installed on these vehicles.
- 1996+ classic vehicles use standard OBD-II even if they are decades old — the port governs the protocol.
- Modifications on any classic vehicle must have CARB Executive Order (EO) numbers to pass visual inspection.
- BAR Referee program is available for vehicles with legitimate modifications that a standard station cannot certify.
- Engine swaps on pre-1976 vehicles may trigger the requirement for a Referee inspection depending on the donor engine year.
Per CA Vehicle Code Section 4000.4 and BAR pre-OBD inspection protocol.
About Classic Car Smog Check at Smog Check Garden Grove
Specialized classic car smog check performed at Smog Check Garden Grove, our Garden Grove location.
Visit us for classic car smog check
- Address: 13501 Magnolia St, Garden Grove, CA 92844
- Phone: (657) 206-2767
- Website: https://www.smogcheckgg.com/
- Hours: Mon-Fri 8 AM – 6 PM · Sat 8 AM – 4 PM
What we do
- California-required smog inspection
- OBD-II readiness verification
- Same-day electronic DMV certificate filing
- Walk-ins welcome (no appointment needed)
- Bilingual English / Spanish service
*Regenerated 2026-05-25 from GBP-verified canonical data.*