Texas Vehicle Emissions Testing: Rules, Costs, and Waivers

Texas vehicle emissions testing is required in 17 counties, with an 18th (Bexar) joining on November 1, 2026. If your vehicle is registered in one of these counties, you cannot renew your registration without a passing emissions result on file.¹ Outside those counties, you have no emissions testing obligation. Note that Texas eliminated the separate safety inspection for non-commercial vehicles in January 2025, but emissions testing in the covered counties was preserved.²

Counties Where Emissions Testing Is Required

The requirement applies in four regions:¹

Houston-Galveston-Brazoria: Brazoria, Fort Bend, Galveston, Harris, and Montgomery
Dallas-Fort Worth: Collin, Dallas, Denton, Ellis, Johnson, Kaufman, Parker, Rockwall, and Tarrant
Austin area: Travis and Williamson
West Texas: El Paso

Bexar County (San Antonio) joins on November 1, 2026. If your Bexar-registered vehicle already has unexpired tags on that date, you won’t need an emissions test until your next renewal after the cutoff. The test fee in Bexar will be $18.50.³⁴

Which Vehicles Have to Be Tested

Only gasoline-powered vehicles between 2 and 24 model years old are subject to testing. A brand-new car bought in 2026 won’t face its first emissions test until 2028, and once a vehicle passes 24 model years, it ages out of the program.¹

Exempt regardless of age: electric vehicles, diesel vehicles, motorcycles, and mopeds. Plug-in hybrids with a gasoline engine are not exempt and follow the same schedule as conventional gasoline cars.¹

What It Costs

Maximum station fees depend on your county:⁵

Dallas-Fort Worth and Houston-area counties: $18.50
El Paso, Travis, and Williamson counties: $11.50
Bexar County starting November 2026: $18.50

Separately, every non-commercial vehicle in Texas owes a $7.50 Inspection Program Replacement Fee collected at registration. New vehicles that have never been registered pay $16.75 upfront to cover two years.⁶

How to Avoid a Failed Test

The fastest way to fail is to show up with your Check Engine light on. If the vehicle’s computer is commanding that light, the inspector has to fail you automatically, with no further testing.⁷ Get the underlying fault diagnosed and repaired before you go.

There’s also a less obvious trap. If your battery was recently disconnected or replaced, or if someone cleared the codes at an auto parts store, the vehicle’s onboard computer needs time to rerun its internal self-checks. Until those checks complete, the system reports “not ready” and the inspector cannot finish the test. A few days of mixed city and highway driving before your appointment usually lets the monitors cycle through.

Bring valid proof of insurance. State-certified stations can be located through the DPS website.

What the Inspection Involves

Gasoline vehicles from 1996 or newer with a gross vehicle weight of 8,500 pounds or less get an OBD-II test. The technician plugs a diagnostic tool into the port under your dashboard and downloads data from the emissions control system, checking for stored trouble codes, confirming the Check Engine light isn’t commanded on, and verifying that the onboard monitors have completed.⁸

Model year 1995 and older vehicles get a tailpipe test instead. In the Dallas-Fort Worth and Houston-area counties, that means the Acceleration Simulation Mode test on a dynamometer. In El Paso, Travis, and Williamson counties, older vehicles get the Two-Speed Idle test at the tailpipe.⁸

Results transmit electronically to the state’s Vehicle Information Management database. When you renew online or at the county tax office, the system already sees your pass. No paper certificate changes hands.

If Your Vehicle Fails

You’re entitled to one free retest at the same station where you originally failed, provided you complete qualifying emissions-related repairs and return within 15 days. Bring a completed Vehicle Repair Form documenting the work.⁹ Miss the 15-day window, or go to a different station, and you’ll pay the full inspection fee again.

Common causes of failure include a faulty oxygen sensor, a bad catalytic converter, or an evaporative emissions leak. The inspection report lists the specific diagnostic trouble codes that triggered the failure, which gives your mechanic a starting point. Clearing the codes without fixing the underlying problem just resets the monitors to “not ready” and wastes a trip.

Waivers and Time Extensions

If repairs still can’t get your vehicle to pass, the Department of Public Safety issues several forms of relief.¹⁰

Individual Vehicle Waiver

The most common option. Your vehicle must have failed the initial test and at least one retest, and you must have spent at least $600 on emissions-related repairs in most counties, or $450 in El Paso County.¹¹ Repairs need itemized receipts showing parts and labor, and the work has to be performed after the initial failed inspection to count toward the threshold.¹⁰

Parts Availability Time Extension

If the vehicle failed because of a component that isn’t readily available, such as a discontinued or backordered part, you can request a time extension while you wait. You can apply once per annual testing cycle.¹²

Low-Income Time Extension

Owners who meet certain income requirements can request a Low-Income Time Extension valid for one inspection cycle. It can be granted more than once over the life of a vehicle.¹⁰ Separately, the state’s Low-Income Vehicle Repair Assistance Program (LIRAP) may help cover emissions-related repair costs for qualifying owners. Eligibility and funding vary, so check with TCEQ for current availability in your county.¹³

How to Apply for a Waiver

All waivers and time extensions go through DPS. Have these ready:

Your failed inspection report showing the diagnostic trouble codes
Itemized repair receipts dated after the initial failure (for the Individual Vehicle Waiver)
Your Vehicle Identification Number and registration information
The completed waiver application form from the DPS website

A DPS representative verifies the repairs by reviewing the vehicle’s computer for the previously flagged fault codes. Once approved, the waiver updates in the state database so you can complete registration at the county tax office. Each waiver covers a single registration cycle, so at your next renewal you’ll need either a passing test or a fresh waiver.¹²

What Happens If You Skip It

Without a passing emissions test on file, the state will not renew your registration. Driving on expired registration in Texas can bring a fine of up to $200, plus a 20 percent late penalty added to your registration fee when you eventually renew. This falls under Texas Transportation Code Section 502.407, and law enforcement can cite you during any routine stop.

Even when a vehicle needs work, the waiver pathway lets you register after meeting the repair-spending threshold. Ignoring the process typically costs more in the end than dealing with it directly.

1
Texas Commission on Environmental Quality. Vehicle Emissions Inspections in Texas
2
Texas Legislature Online. 88(R) HB 3297 – Committee Report (Unamended) Version – Bill Analysis
3
Texas Department of Public Safety. Bexar County Emission Inspections
4
Texas Department of Public Safety. DPS Reminds Texans of Upcoming Emissions Test Requirement in Bexar Co.
5
Texas Department of Public Safety. Cost of Inspection
6
Texas Department of Public Safety. Vehicle Safety Inspection Program Changes Now in Effect
7
Texas Department of Public Safety. Emissions Testing
8
Regulations.gov. Vehicle Emissions Inspection and Maintenance Rules and Regulations Manual for Official Vehicle Inspection Stations and Certified Inspectors
9
U.S. Environmental Protection Agency. Texas SIP: 30 TAC 114.50-114.53 Vehicle Inspection and Maintenance SIP
10
Texas Commission on Environmental Quality. Affidavit, Waivers and Extensions, and the Vehicle Inspection Report
11
Legal Information Institute. Texas Administrative Code 37-23.52 – Individual Vehicle Waiver
12
Texas Department of Public Safety. Waivers and Time Extensions
13
Texas Commission on Environmental Quality. Vehicle Repair Assistance