BAR On-Board Diagnostic Inspection System

ALERT! Biometric palm scans to replace passwords for BAR-OIS inspections—schedule your enrollment appointment online today!

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. Implemented statewide on March 9, 2015, the system consists of a certified Data Acquisition Device (DAD) and off-the-shelf equipment. The BAR-OIS uses the California BAR-OIS software to communicate with BAR's central database through an internet connection.



Important BAR-OIS Updates

  • Biometric palm scans to replace passwords for BAR-OIS inspections—get ready for the rollout!

  • Smog Check stations running Windows 7 and 8.0 operating system software on their BAR-OIS computers are at risk of malware, stolen/lost data, and downtime. BAR strongly recommends stations follow industry best practice by making sure Windows updates are turned on and by moving to a supported operating system, specifically Windows 11 or Windows 10. Windows 8.1 computers can be used until they go out of support January 2023 if kept updated.

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
2022 DAD Certification Application Collection Period 11/28/22-12/12/22