Which vehicles are required to have the emissions test?
Vehicles registered in the affected counties. Affected counties include: Brazoria, Collin, Dallas, Denton, El Paso, Ellis, Fort Bend, Galveston, Harris, Johnson, Kaufman, Montgomery, Parker, Rockwall, Tarrant, Travis, and Williamson.
- Bexar County will be an emissions county starting November 1, 2026.
- All gasoline powered vehicles from 2 through 24 years old which are registered in emissions counties will receive the On-Board Diagnostic (OBDII) test.
- Consumer Information (VI-31A)
Emissions Inspection Items
| Insurance | Catalytic Converter System |
| EGR System (Exhaust Gas Recirculation) | Evaporative Emissions Control System |
| Exhaust System | Gas Cap |
| Intake System | PCV System (Positive Crankcase Ventilation) |