📅 2026 Update: Changes in Ignition Interlock Laws and Practices

Since the original article was published, several key developments have impacted ignition interlock devices and their role in DUI and DWI laws. Changes include legislative proposals and cybersecurity incidents affecting service providers. The information below updates important aspects of ignition interlock devices, while the earlier article continues further down the page.

🚗 New Legislative Developments

In May 2026, North Carolina lawmakers proposed a bill to require ignition interlock devices for all drivers convicted of driving while impaired. This expands the previous requirement that only applied to repeat offenders and those with severe cases. If passed, this law could significantly increase the number of drivers using ignition interlocks in the state.

🔐 Cybersecurity Issues

A significant cyberattack on Intoxalock occurred in March 2026, affecting services for hundreds of users across 46 states. The attack disrupted device calibrations and functionality, leaving many drivers unable to start their vehicles. This incident highlights the importance of security for ignition interlock service providers.

💰 Costs of Ignition Interlock Devices

The costs associated with ignition interlock devices remain substantial. Installation fees typically range from $70 to $150. Monthly monitoring fees often fall between $50 and $120, leading to annual expenses that can total between $1,000 and $2,400.

These figures reflect current market conditions and can vary by provider.

📅 Compliance and Processing Times

In Arizona, drivers must install the ignition interlock device and provide verification to the Motor Vehicle Division within 30 days of conviction. If they fail to do so, driving privileges may be suspended. Processing times for applications can take up to two weeks, impacting timely access to necessary devices.

📌 Key Takeaways

  • New legislation may expand ignition interlock requirements in North Carolina.
  • A cyberattack on Intoxalock has disrupted services for many drivers.
  • Total annual costs for ignition interlock devices can range from $1,000 to $2,400.
  • Compliance deadlines are strict, especially in Arizona.
  • Processing times for applications can vary significantly by state.

💡 Tips for Navigating Ignition Interlock Requirements

It's essential to review the details of your specific situation with your attorney.

📝 Understand Your State's Laws

Each state has unique laws regarding ignition interlock devices. Familiarize yourself with local regulations to ensure compliance and avoid penalties.

🔄 Keep Up with Calibration

Regular calibration of the ignition interlock device is crucial. Depending on your state, this may be required every 30 to 90 days and costs between $20 and $60 per visit.

📅 Track Deadlines

Be mindful of installation and verification deadlines after a DUI conviction. Missing these deadlines can lead to suspension of driving privileges.

💬 Reach Out for Assistance

If you have concerns about costs or service, reach out to resources provided by the state. Agencies often offer support and information on affordability programs.

📊 Monitor Compliance Rates

Stay informed about compliance rates in your area. For instance, in Washington State, only 41% of drivers complied with ignition interlock installation between January 2018 and June 2025.

❓ Frequently Asked Questions

❓ What is the purpose of an ignition interlock device?

An ignition interlock device is designed to prevent impaired driving. Drivers must blow into the device before starting their vehicle to ensure their breath-alcohol level is below a set limit.

📅 How often do I need to calibrate my ignition interlock device?

Calibration is required every 30 to 90 days, depending on state regulations. This process ensures the device is functioning correctly and may incur a cost of $20 to $60 per visit.

🚗 What happens if I miss a rolling retest?

If a rolling retest is missed, it does not shut off the engine but is logged and reported to the court or licensing authority. This can lead to legal consequences for the driver.

🏛️ Are there any recent laws affecting ignition interlock devices?

Yes, as of May 2026, North Carolina proposed a bill requiring ignition interlock devices for all drivers convicted of driving while impaired, significantly broadening the requirement.

💼 What should I do if I experience issues with my ignition interlock device?

If you encounter problems with your device, contact your service provider immediately. They should be able to assist with troubleshooting or arrange for repairs.

🔍 How can I find financial assistance for ignition interlock installation?

In some states, resources such as the Washington State Patrol provide information on affordability programs for individuals required to install ignition interlock devices.

⚖️ Recent Court Cases Involving Ignition Interlock Devices

Recent court rulings have addressed various aspects of ignition interlock devices, including compliance issues and the legality of penalties for non-compliance.

For more recent rulings, visit the news section for updates.

End of October 2026 Update






Background



Ignition Interlock Devices (IID) are a electronic devices that are used as a means to deter drunk driving. The small electronic devices are about the size of a basic cell phone and are attached to the dashboard of a vehicle and control the engine start. The driver has to provide a  clean (alcohol-free) breath sample into the device in order for the vehicle to start.



The breath sample must be under the preset BAC level, according to state requirements in order for it to be clean. The device also tests the driver’s breath while driving to assure that the driver entered the sample, and prevent tampering.  IID’s use a fuel cell that causes a chemical reaction when alcohol enters the device, and through an electric current cause the BAC level can be read.



Purpose



Ignition Interlock Devices were designed specifically to prevent a drunk driver from getting behind the wheel of a vehicle. The rising number of alcohol-related vehicular deaths drew great concern from many people and organizations. The penalties that were in effect weren’t working, primarily because of the significant distance between them. Most people (first time offenders) received light sentences a fine and/or community service/probation/short term license suspension, whereas others (repeat offenders) received long term to permanent suspensions of license and significant jail time.



A need for a middle ground was necessary and the introduction of the IID device made that possible.  The device would not only help prevent drunk driving offenders from repeat offenders, but also serve as a way for first time offenders to avoid additional sentencing. 



Prevalence and Implementation



The positive effect the installment of Ignition Interlock Devices has brought to the United States and Canada has led to the rise in use. The numbers are there to show the number of drunk drivers kept off the road each year thanks to the IID’s, and the numbers are extremely high. The devices themselves also record any data activity for a certain period of time.

Ignition Interlock Overview


Due to the fact that they require calibration at intervals spanning from 30 to 90 days, this data can be monitored. During calibration, the activity data of an IID is downloaded and reviewed. If the readings show the driver attempting to bypass the system using someone else’s breath sample, and then getting caught during the driving sample, this can lead to additional sanctions. These devices can thoroughly and effectively help to ultimately keep a drunk driver off the road.



Legal Arguments



For the most part, the use of IID devices has received a highly positive response and a demand by the public and politicians alike to install them more often. In some states these devices are mandatory for anyone that is convicted of drunk driving, whereas in others, bills have been proposed to join them and do just that. This has led to some controversy, especially from the general public.



People believe implementing these devices through such a law would prevent judges and governing bodies from determining the true character of the person being charged. They believe the uniform penalty wouldn’t be a fitting one for first time offenders as opposed to people who drive drunk on a regular basis. Others argue that this is irrelevant because a person who drove drunk once made the mistake, and must take the necessary steps to prevent it from happening again. This debate will continue to build, but mainly those in favor of these devices being installed in all cases make up the majority.