If you’ve been arrested or convicted for DWI in Texas, you may be facing more than just fines or a suspended license—you may also be required to install an ignition interlock device (IID) on your vehicle. For many, this requirement feels like a punishment in itself. But understanding what an IID is, when it’s required, and how to comply with the law can help you minimize the disruption to your life.

At The Law Office of Alex Tyra, P.C., we help drivers facing DWI charges understand their obligations and fight for better outcomes.

What Is an Ignition Interlock Device?

An ignition interlock device is a breathalyzer that’s installed directly into your car. Before starting your vehicle, you must blow into the device. If it detects alcohol above a preset limit (usually 0.02% or 0.04% BAC), the engine will not start.

Some devices also require “rolling retests” while the vehicle is in motion to ensure you haven’t consumed alcohol after starting the car.

The device is wired into your ignition and records data including:

• BAC test results

• Any failed attempts to start

• Missed calibrations or service appointments

• Any attempts to tamper with or remove the device

This data is sent to the monitoring authority, such as your probation officer, the court, or the Department of Public Safety (DPS).

When Is an IID Required After a Texas DWI?

Whether you must install an IID depends on several factors, including the nature of the offense and whether it is your first DWI. You may be required to install an IID if:

• You are convicted of a second or subsequent DWI

• Your BAC was 0.15 or higher

• You are granted an occupational license after your DWI arrest

• A judge includes the IID as a condition of bond, probation, or deferred adjudication

Even first-time offenders may be ordered to use an IID, especially if the court believes it will protect public safety.

How Long Do I Have to Keep the IID?

The length of time you must use an ignition interlock device varies, but can range from a few months to two years or more depending on the case and whether there were prior convictions. The court or DPS will determine the minimum period and any conditions you must meet to have the device removed.

Failing to comply can result in:

• Probation revocation

• Additional criminal charges

• Loss of occupational license

• Extension of IID requirements

Costs of an Ignition Interlock Device

You are responsible for the cost of installing, maintaining, and monitoring the IID. The average fees include:

• Installation: $70–$150

• Monthly monitoring: $60–$100

• Removal: $50–$100

These costs can add up quickly. In some cases, courts may waive or reduce fees for those who can demonstrate financial hardship, but you must file the appropriate petition and documentation.

Defending Against IID Requirements

One of the most effective ways to avoid the ignition interlock requirement is to fight the DWI charge itself. If we succeed in getting the charges dismissed or reduced to a non-alcohol-related offense, the court may not order an IID at all.

At The Law Office of Alex Tyra, P.C., we also fight to:

• Challenge BAC evidence that triggers the IID requirement

• Negotiate plea deals that minimize or eliminate IID use

• Ensure your rights are protected at all stages of your case

In many cases, we’ve helped clients avoid an interlock device entirely—or reduced the length of time they were required to use one.

Call The Law Office of Alex Tyra, P.C. For Your Free Consultation

A DWI charge can have serious consequences, but with the right legal representation, you can fight to protect your rights and future. Let us provide the defense you need to pursue a favorable resolution.

A Texas DWI conviction can have a lasting impact on many aspects of your life, but understanding these consequences and knowing how to mitigate them can make a significant difference. The Law Office of Alex Tyra, P.C. is dedicated to providing the support and legal expertise you need during this challenging time.

Call us now at (903) 753-7499 to discuss your case and explore your options for defense. Our experienced team is here to help you move forward and protect your future.