Smog Check Program

Important! The BAR On-Board Diagnostic Inspection System (BAR-OIS) software has been rebranded the California Vehicle Inspection System (Cal-VIS). Cal-VIS will support both Smog Check inspections and, upon implementation of the Vehicle Safety Systems Inspection Program later this year, vehicle safety systems inspections.

The Cal-VIS rebrand will begin with the 23.3 server version update that will roll out to stations beginning January 8, 2024.

Information and resources for Smog Check stations, inspectors, and repair technicians


BAR On-Board Diagnostic Inspection System


BAR-97 Emissions Inspection System

Smog Check Manual

Inspection procedures and equipment requirements

Smog Check Reference Guide

Reference information, repair and retest procedures, BAR Referee

On-Board Diagnostic Test Reference

Pass/fail standards, inspecting vehicles with OBD test difficulties

STAR Program

STAR Report Card, eligibility and certification, performance measures