BAR On-Board Diagnostic Inspection System

ALERT: Windows 11 is not compatible with BAR-OIS. Stations are advised not to install the Windows 11 update on a BAR-OIS computer or purchase a new computer with Windows 11.

The BAR On-Board Diagnostic Inspection System (BAR-OIS) is required to inspect most model-year 2000 and newer gasoline vehicles, hybrid vehicles, and alternative-fuel vehicles and most model-year 1998 and newer diesel vehicles.

The BAR-OIS consists of a certified Data Acquisition Device (DAD) and off-the-shelf equipment, including a computer, bar code scanner, and printer. The system uses the California BAR-OIS software to communicate with BAR's central database through an internet connection.

For information on BAR-OIS inspection requirements, refer to the Smog Check Manual. For information on system and equipment requirements, refer to the BAR-OIS Frequently Asked Questions page.

General Information

User Guides and Tutorials

Resources

BAR-OIS Milestones

Milestone	Date
BAR-OIS DAD Specification Published	01/04/13
OBD Regulation Effective	07/01/13
2013 DAD Certification Application Collection Period	08/01/13 – 08/19/13
2014 DAD Certification Application Collection Period	01/27/14 – 02/10/14
BAR-OIS Deployment Begins	06/16/14
BAR-OIS Use Required Statewide	03/09/15
OBD Readiness Monitor Standards Implemented	05/04/15
2015 DAD Certification Application Collection Period	11/30/15 – 12/11/15
2016 DAD Certification Application Collection Period	12/05/16 – 12/16/16
2017 DAD Certification Application Collection Period	11/27/17 – 12/08/17
2018 DAD Certification Application Collection Period	12/03/18 – 12/14/18
2019 DAD Certification Application Collection Period	12/02/19 – 12/13/19
2020 DAD Certification Application Collection Period	11/30/20 – 12/11/20
2021 DAD Certification Application Collection Period	11/29/21 – 12/12/21