Smog Check inspections
Smog Check licensees provide emissions services, including inspections and repairs. Inspectors use one of two systems depending on vehicle age, weight, and fuel type. The BAR On-Board Diagnostic Inspection System collects data from 2000 and newer vehicles. The BAR-97 Emissions Inspection System measures tailpipe emissions on 1999 and older vehicles. Stations may also get STAR program certification to inspect directed vehicles.
Reference guides
Smog Check Reference Guide - Reference information on the Smog Check Program, repair and retest procedures, Referee services, engine changes, and more
On-Board Diagnostic Test Reference - A summary of pass/fail standards and instructions for inspecting vehicles with known test difficulties
Acceleration Simulation Mode emissions standards - Search Acceleration Simulation Mode emissions standards by vehicle make, model year, and body type
Two-speed idle cutpoints - Cutpoints for vehicles tested using the two-speed idle test on the BAR-97 EIS
Station checklist
Use our helpful checklist to verify you have everything needed to perform inspections. Find requirements for:
- Signs and licenses
- BAR-OIS
- BAR-97 EIS
- Equipment
- Reference materials and records
Certificates
Order electronic certificates of compliance through the BAR-OIS. Before placing your first order:
- Register and download the Cal-VIS software to your BAR-OIS
- Complete the online enrollment and participation agreement through the Cal-VIS billing portal
You can also order certificates through the BAR-97 EIS and by mail. If you have unused certificates, you may request a refund.
STAR program
The STAR program is a voluntary program for stations seeking to inspect directed vehicles. Stations and technicians participating in the program must adhere to high inspection-based standards. These quality inspections are critical in helping the state meet required emissions reductions.
Resources
Smog Check Program regulations
Aftermarket, performance, and add-on parts
Clean Truck Check - Heavy-Duty Inspection and Maintenance Program