Smog Check and Car Inspection in TexasPage Overview
Continue reading for more information about Texas safety inspections and the Inspection and Maintenance (I/M) Program, including which residents and vehicles require them, applicable fees, and what to do after your vehicle passes or fails an inspection.
You must register your vehicle within 30 days of moving to Texas, and both vehicle safety inspections and emissions tests are required before you can register.
Texas does not recognize out-of-state inspections.
Texas Vehicle Inspection Requirements
You must have your vehicle inspected before you can register it; there are no exceptions.
After your initial safety inspection, your registration sticker will serve as a reminder of the next time you must have your vehicle inspected as part of the state’s Two Steps, One Sticker program.
Texas requires all gasoline-powered vehicles 2 to 24 model years old to undergo annual emissions testing (new vehicles don’t require emissions testing until they are at least 2 model years old.).
Testing is required only in the following areas/counties:
- Austin-Round Rock:
- Fort Bend
- Dallas-Fort Worth:
- El Paso:
- El Paso
No vehicles in Texas are exempt from safety inspections.
The following vehicles are exempt from emissions testing:
- Vehicles under 2 years old.
- Vehicles older than 24 years old.
- Diesel-powered vehicles.
To complete a vehicle safety inspection in Texas, visit a DPS-certified inspection station and bring the $12.75 safety inspection fee.
Once your vehicle passes, you’ll receive documentation to present when you register or renew your registration; this information may also be entered electronically. You’ll then receive a windshield sticker as proof of passing and valid registration as part of the Two Step, One Sticker program.
NOTE: Generally, safety inspection stations don’t require proof of registration or identification; however, it’s best to bring these documents as requirements can vary by station.
Failed Safety Inspections
If your vehicle fails, you must have it repaired and retested.
To complete a vehicle emissions check in Texas, visit a DPS-certified inspection station and bring:
- Proof of insurance.
- The applicable fee.
After you pass your emissions test, you’ll receive a Vehicle Inspection Report (VIR) stating you passed (these reports also state if you’ve failed). You may obtain a copy of the report for up to 13 months of the inspection date.
Failed Emissions Inspections
If your car or truck fails its Texas smog check, you must have it repaired and retested; if it still fails, it could be eligible for a waiver or extension. These vary from low-mileage waivers for vehicles driven less than 5,000 miles during its inspection cycle, to low-income waivers for residents who qualify.
Visit the TCEQ’s Waivers and Extensions page for a full list.
If you meet certain location, income, and vehicle requirements, you could be eligible for a repair assistance voucher of up to $600.
Qualifying vehicles must be repaired at an approved emissions repair facility. You’ll receive a list from the program administrator when your voucher application is approved.
Learn more about repair assistance requirements and how to apply for a voucher at the state’s Vehicle Repair Assistance page.
Your technician will check the basic safety components of your vehicle including, but not limited to, the vehicle’s:
Depending on your vehicle and location, your vehicle will undergo:
- On-Board Diagnostics (OBD) testing: Determines whether vehicle components— such as the emission control equipment, ignition system, and fuel metering system—are functioning within emissions standards.
- Acceleration Stimulation Mode (ASM) testing: Uses a dynamometer to check for nitrogen oxides (NOx), carbon dioxide (CO2), hydrocarbons (HC), and carbon monoxide (CO) for vehicles model year 1995 and older. ASM is comprised of 2 parts:
- 50/15 mode: Simulates 50% of the vehicle's HP at 15 MPH.
- 25/25 mode: Simulates 25% of the vehicle’s HP at 25 MPH.
- Two-Speed Idle (TSI) testing: Checks for CO2, CO, and HC for vehicles model year 1995 and older. TSI is comprised of 2 parts:
- High-speed inspection: Checks the vehicle at 2,200 to 2800 RPM.
- Idle inspection: Checks the vehicle at at 350 to 1,200 RPM.
Texas Incentives for Eco-Friendly Driving
Texas rewards drivers of eco-friendly, "green" vehicles.
The following vehicles are exempt from smog and emissions testing:
- Vehicles not powered by gasoline (including electric vehicles).
- Diesel-powered vehicles.
Because they're able to run on gasoline, hybrids are not exempt from smog checks.
NOTE: All vehicles registered in Texas must undergo the safety inspection, regardless of whether they are electric cars, hybrids, diesels, etc.
For more information about the perks and laws of eco-friendly driving, including smog checks and emissions inspections, visit our sections on green driver incentives and green driving laws and regulations.Other Topics in This Section
- Austin-Round Rock: