I/M Rules, Program Reports, and Helpful Links
Links to the Vehicle Emissions Inspection and Maintenance (I/M) Program rules, related documents, analyzer specifications, and other related Web sites.
Rules
TCEQ Vehicle Emissions Inspection Program rules
Program Reports
Fee Analysis
2022 Fee Analysis for AirCheckTexas Vehicle Emissions Inspection Program
2020 Fee Analysis for AirCheckTexas Vehicle Emissions Inspection Program
2020 Fee Analysis for AirCheckTexas Vehicle Emissions Inspection Program (Bexar County)
2018 Fee Analysis for AirCheckTexas Vehicle Emissions Inspection Program
2016 Fee Analysis for AirCheckTexas Vehicle Emissions Inspection Program
2014 Fee Analysis for AirCheckTexas Vehicle Emissions Inspection Program
2012 Fee Analysis for AirCheckTexas Vehicle Emissions Inspection Program
2009 Fee Analysis for AirCheckTexas Vehicle Emissions Inspection Program
2007 Fee Analysis for AirCheckTexas Vehicle Emissions Inspection Program
Program Evaluation
2022 Inspection and Maintenance Program Evaluation
2020 Inspection and Maintenance Program Evaluation
2018 Inspection and Maintenance Program Evaluation
2016 Inspection and Maintenance Program Evaluation
2015 Inspection and Maintenance Program Evaluation (Austin Area )
2014 Inspection and Maintenance Program Evaluation
2012 Inspection and Maintenance Program Evaluation
2009 Inspection and Maintenance Program Evaluation
2006 Inspection and Maintenance Program Evaluation
Program Enhancement Studies
2010 Enhancements to On-Board Diagnostics Components of the Inspection and Maintenance Program
2010 Eliminating Tailpipe Testing from the Inspection and Maintenance Program
Analyzer Specifications
Texas Vehicle Emissions Inspection Analyzer Specifications
Helpful Links
The following links will take you off the TCEQ Web site. 
Texas Department of Public Safety (DPS)
Texas Department of Motor Vehicles (TxDMV)
Texas Department of Transportation (TxDOT)