BAR-97 Emissions Inspection System

Specifications, Procedures, and Equipment

Frequently Asked Questions

What is the BAR-97 Emissions Inspection System?

The BAR-97 Emissions Inspection System (EIS) tests vehicles under simulated driving conditions to detect oxides of nitrogen (NOx), hydrocarbons (HC), and carbon monoxide (CO) emissions. These are the major chemical components of smog.

For equipment specifications and inspection procedures, refer to the BAR-97 EIS Specification.

What vehicles must be inspected on the BAR-97 EIS?

Model year 1999 and older gasoline vehicles, any model year gasoline vehicle not equipped with OBD II, and any model year gasoline vehicle over 14,000 GVWR require inspection on the BAR-97 EIS.

Vehicles registered in enhanced areas require an acceleration simulation mode (ASM) inspection. Vehicles that are incompatible with the ASM inspection or are registered in basic and change of ownership Areas require a two speed idle inspection.

For more information on test requirements, refer to the Smog Check Manual.

What stations are required to have a BAR-97 EIS?

All STAR stations and Smog Check stations located in enhanced areas are required to have a BAR-97 EIS. Basic Area stations must use the BAR-97 EIS when inspecting vehicles registered in enhanced areas.

What gas cap adapters are required?

Fuel cap functional tests are required to be performed only on 1995 and older model year vehicles as part of a BAR-97 EIS inspection. Stations performing BAR-97 EIS inspections on these vehicles are required to maintain the following fuel cap adapters for use when completing fuel cap functional tests:

Stant Adapters

  • Blue 12403
  • Yellow 12404
  • Red with white ring 12405
  • Green 12406
  • Black with white ring 12407
  • Gray 12408
  • Pink 12426

Waekon Adapters

  • Red FPT25-1
  • Gray FPT25-2
  • Yellow FPT25-3
  • Black FPT25-4
  • Green FPT25-5