Highlights of the Vehicle I/M Program

Brief description by area of the inspection and maintenance (I/M) program in Texas

Subject Vehicles: gasoline vehicles model-year 2-24 years old are subject to an annual emissions inspection beginning with the vehicle's second anniversary
Inspection Method: model-year 1996 and newer vehicles are subject to on-board diagnostics (OBD) inspections and model-year 1995 and older vehicles are subject to two speed idle (TSI) inspections
Test Fees: not to exceed $16.00 for a TSI or OBD inspection, plus $12.75 for the safety inspection, total not to exceed $28.75
State Administration Fees: $2.50 from all emissions inspections for the TCEQ/DPS administration of the I/M program and $2.00 to fund the Low Income Repair Assistance, Retrofit, and Accelerated Vehicle Retirement Program (LIRAP)
Timing: OBD/TSI inspections began on September 1, 2005, in Travis and Williamson Counties
Testing Network: all inspection stations are required to offer TSI and OBD inspections
Waivers: waivers and time extensions are available for eligible vehicle owners

Subject Vehicles: gasoline vehicles model-year 2-24 years old are subject to an annual emissions inspection beginning with the vehicle's second anniversary
Inspection Method: model-year 1996 and newer vehicles are subject to OBD inspections and model-year 1995 and older vehicles are subject to acceleration simulation mode (ASM) inspections
Test Fee: not to exceed $27.00 for an ASM or OBD inspection, plus $12.75 for the safety inspection, total not to exceed $39.75
State administration fees: $2.50 from all emissions inspections for the TCEQ/DPS administration of the I/M program and $6.00 from all OBD inspections to fund the LIRAP
Timing:
- May 1, 2002: ASM/OBD inspections began in Collin, Dallas, Denton, Harris, and Tarrant Counties
- May 1, 2003: ASM/OBD inspections began in Brazoria, Ellis, Fort Bend, Galveston, Johnson, Kaufman, Montgomery, Parker, and Rockwall Counties
Testing Network: all inspection stations offer ASM and OBD inspections, unless the station is approved to be a low volume OBD-only station by the DPS
Waivers: waivers and time extensions are available for eligible vehicle owners

Subject Vehicles: gasoline vehicles model-year 2-24 years old are subject to annual emissions inspection beginning with the vehicle's second anniversary
Inspection Method: model-year 1996 and newer vehicles are subject to OBD inspections and model-year 1995 and older vehicles are subject to TSI inspections.
Test Fee: not to exceed $14.00 for a TSI or OBD emission inspection, plus $12.75 for a safety test, total not to exceed $26.75
State administration fees: $2.50 from all emissions inspections for the TCEQ/DPS administration of the I/M program
Timing: OBD/TSI began on January 1, 2007, in El Paso County
Testing Network: all inspection stations are required to offer TSI and OBD inspections
Waivers: waivers and time extensions are available for eligible vehicle owners