Ignition Interlock Device: Texas Laws Explained
blog

Ignition Interlock Device: Texas Laws Explained

Updated:
12/23/2024
Table of Contents

An ignition interlock device is a tool mandated for certain drivers with a DWI (Driving While Intoxicated) conviction. This device is designed to prevent drunk driving by requiring a breath sample to start the vehicle. Let’s explore the laws surrounding ignition interlock devices in Texas, including who must install them, the legal requirements, and what to expect if you need an IID.

What Is an Ignition Interlock Device?

An ignition interlock device (or IID) is a breathalyzer installed in a motor vehicle that requires the driver to provide a breath sample before the vehicle’s ignition system will allow it to start. If the device detects alcohol above a preset limit, the vehicle will not start, helping to prevent individuals with alcohol in their system from driving.

Texas Law and Ignition Interlock Device Requirements

Under Texas Transportation Code §521.246, courts may require ignition interlock devices for those convicted of DWI. Whether mandated by the court or state law, IIDs are part of Texas's broader strategy to improve public safety by reducing the risk of repeat drunk driving incidents.

Who Must Install an IID?

Who Is Required to Install an Ignition Interlock Device?

Texas law requires the installation of an ignition interlock device for:

  • First-Time DWI Offenders with High BAC
    Individuals convicted of a first DWI offense with a blood alcohol concentration (BAC) of 0.15% or higher are required to install an IID.
  • Repeat DWI Offenders
    Those with multiple DWI convictions are mandated to have an IID installed, reflecting the state's stringent measures against repeat offenses.
  • DWI with Child Passenger
    Drivers convicted of a DWI while transporting a child under 15 years of age must install an IID as part of their penalties.
  • Occupational License Holders
    Individuals seeking an occupational license during a license suspension period due to a DWI conviction are often required to have an IID installed to regain limited driving privileges.
  • Probation Conditions
    Courts may impose IID installation as a condition of probation for DWI offenders, ensuring compliance with sobriety requirements.

How the Ignition Interlock Device Works

The ignition interlock device requires a breath sample before the vehicle starts. The device then analyzes the sample for alcohol content. If the sample meets the preset limit (usually 0.02% or lower), the vehicle starts; otherwise, the ignition is disabled.

While driving, the IID may require additional “rolling retests”. These periodic checks are designed to ensure the driver has not consumed alcohol after the initial start.

Installation and Maintenance of an IID

To comply with ignition interlock device requirements in Texas, individuals must arrange for the installation of the device through a certified provider. After installation, the driver is responsible for ongoing calibration, testing, and any maintenance the device requires.

Man Arrested for DWI

Scheduling an Installation Appointment

It’s essential to schedule an installation appointment with a certified IID provider as soon as possible, especially if court-ordered. Missing an installation deadline may result in further penalties or an extension of the IID requirement.

Reasonable Payment Schedule for IID Costs

The cost of installation, calibration, and maintenance of the IID falls on the individual. However, Texas allows for a reasonable payment schedule for those who demonstrate financial hardship, helping to make compliance more accessible.

Restricted Interlock License

In Texas, individuals with an IID installed may apply for a restricted interlock license. This special license allows individuals with a suspended license due to DWI to regain their driving privileges, as long as they comply with IID requirements.

How to Obtain a Restricted Interlock License

To obtain a restricted interlock license, applicants must:

  1. Complete any required alcohol education programs.
  2. Submit proof of IID installation.
  3. Pay any applicable fees.

Once approved, the restricted license permits the individual to operate a motor vehicle equipped with an IID.

Passing Alcohol Education Program

Consequences for Failing to Install an IID

Failing to install a court-ordered IID can lead to further penalties, including extended license suspension, fines, or even jail time. Texas courts are strict about compliance with IID requirements to ensure public safety and prevent further offenses.

Extending the Ignition Interlock Device Requirement Period

If a person violates IID requirements or commits an additional DWI offense while under an IID order, the court may extend the time the IID must remain installed, sometimes twice the period originally mandated.

When Can the IID Be Removed?

Once the Ignition Interlock requirement is fulfilled, and if the court determines that the individual has complied with all IID conditions, the device can be removed. Typically, the IID must remain installed for the entire duration of the suspension or probation period.

Criteria for IID Removal

Texas courts require proof of compliance, including IID calibration and maintenance records. Additionally, any attempts to start the vehicle with a positive alcohol reading could delay removal approval.

IID Requirements for Different DWI Offenses

The severity of DWI penalties in Texas increases with multiple offenses, and the IID requirement often reflects the offender’s history. For example:

  • First DWI Offense
    IID installation may be required, especially if there are aggravating factors.
  • Second DWI Offense
    Texas courts almost always mandate an IID for repeat offenders.
  • DWI with Child Passenger
    In cases involving a minor passenger, IID requirements and other penalties are typically harsher.

Ignition Interlock Devices and Minors in Texas

Texas law imposes stricter consequences on drivers convicted of DWI with a child passenger, including mandatory IID installation. Courts are especially vigilant about these cases, as they involve additional public safety risks.

Can a Minor Operate a Vehicle with an IID?

Only licensed drivers listed on the IID restriction can operate the vehicle. If the minor is of driving age and holds a restricted interlock license, they must comply with all IID requirements.

Can a Minor Operate a Vehicle with an IID?

Texas Department’s Role in IID Enforcement

The Texas Department of Public Safety (DPS) manages the issuance of restricted interlock licenses and oversees IID compliance. DPS works with IID providers and court systems to ensure those required to use an IID adhere to state regulations.

Regular Reporting to DPS

IID providers in Texas regularly submit compliance reports to the DPS. These reports track violations, including failed breath tests, missed rolling retests, or tampering attempts, which could lead to further penalties.

Common Misconceptions About IIDs

Many people believe that only repeat offenders need an IID. However, Texas law allows courts to order an IID for first-time offenders if certain factors are present, like a high blood alcohol level or a child passenger.

Another misconception is that the IID Requirement is optional. Once court-ordered, IID installation is definitely not optional. Noncompliance can lead to additional fines, extended suspension, and potentially jail time.

Contact Our DWI Attorneys to Fight for Your Rights

To summarize, ignition interlock devices are used to prevent drunk driving and allow offenders a second chance to retain some driving privileges under strict conditions. The Texas Transportation Code mandates IIDs for specific DWI convictions, ensuring that public safety remains a priority.

Facing DWI charges in Texas can be overwhelming, especially with strict IID requirements and potential penalties. Don’t face it alone — reach out for dedicated and knowledgeable DWI defense at Turnbull Legal Group. With decades of combined experience, our attorneys will build a strong defense to protect your rights and driving privileges. Contact us to schedule a free case review.

founder

E.R. "Ned" Turnbull

E.R. "Ned" Turnbull, the Managing Partner of Turnbull Legal Group, a former State District Court Judge and Chief Prosecutor, brings extensive experience and leadership to our law firm. He's recognized for his legal expertise, community service, and commitment to justice.

Facing a DWI Conviction? Don’t Go Alone.

We’re here to help you navigate Texas’s laws and safeguard your future.

FAQ

Frequently Asked Questions

What happens if I fail the IID breath test?

If you fail the breath test, the vehicle won’t start. Repeated failures or tampering attempts could lead to extended penalties, including fines and costs of re-calibrating the IID machine.

Do I have to pay for the IID?

Yes, the installation, calibration, and maintenance fees are typically the driver’s responsibility, though payment plans are available for those with financial hardship.

Can I remove the IID myself once the period ends?

No, only an authorized provider can remove the IID after verifying your compliance with court orders.

How often must the IID be calibrated?

The IID requires regular calibration, usually monthly, to ensure it functions correctly and records accurate data.

Can I drive any vehicle with a restricted interlock license?

No, you may only drive vehicles equipped with an IID as mandated by Texas law.

blog

Articles by
E.R. "Ned" Turnbull