Are emission tests mandatory in Texas for vehicle inspection?

Yes, emission tests are mandatory in Texas for vehicle inspection. Vehicles registered in counties with an emissions program are required to pass an emissions inspection every two years. The counties with emissions programs are:

- Brazoria

- Chambers

- Collin

- Dallas

- Denton

- Ellis

- Fort Bend

- Galveston

- Harris

- Johnson

- Kaufman

- Liberty

- Montgomery

- Parker

- Rockwall

- Tarrant

- Waller

Vehicles that are more than 25 years old or that have a gross vehicle weight rating of more than 10,000 pounds are exempt from emissions inspections.

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