Smog Check Program

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

Program Information

  • Smog Check Manual – 2017 – Procedures for performing Smog Check inspections, station equipment requirements, and other inspection information.
  • Smog Check Reference Guide – General Smog Check Program information, including repair and retest procedures, BAR Referee services, State of California Engine Change Guidelines, and other reference materials.
  • On-Board Diagnostic Test Reference – A summary of pass/fail standards for the OBD test portion of a Smog Check inspection and instructions for inspecting vehicles with known OBD test difficulties.
  • STAR Program - Program resources and information, including eligibility and application requirements and STAR Report Card information.

Inspection Equipment

Emissions Tables

Aftermarket, Performance, and Add-On Parts