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Highlights of the Vehicle I/M Program

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

Subject Vehicles: Gasoline vehicles model-year 2-24 years old are required to have 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.
Inspection Fees: Not to exceed $11.50 for a TSI or OBD inspection, plus $7.00 for the safety inspection, total not to exceed $18.50.
State Administration Fees (collected at registration): $2.50 from all emissions inspections for the TCEQ/DPS administration of the I/M program.
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 required to have 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.
Inspection Fees:

Not to exceed $18.50 for an OBD inspection, plus $7.00 for the safety inspection, total not to exceed $25.50 for an OBD inspection; or
Not to exceed $24.50 for an ASM inspection, plus $7.00 for the safety inspection, total not to exceed $31.50 for an ASM inspection.

State Administration Fees (collected at registration): $2.50 from all emissions inspections for the TCEQ/DPS administration of the I/M program.
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.
Inspection Fees: Not to exceed $11.50 for a TSI or OBD emission inspection, plus $7.00 for a safety test, total not to exceed $18.50.
State Administration Fee (collected at registration): $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.