📅 2026 Update: Changes in Ignition Interlock Laws and Services

Since the original article was written, there have been significant updates regarding ignition interlock devices and laws across the United States. This update highlights new legislative proposals, evolving costs, and recent cybersecurity incidents affecting device functionality. For more details on ignition interlock devices and their purpose, please continue reading further down the page.

🚦 Legislative Changes

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 law that applied only to repeat offenders and those with severe offenses. Such changes aim to improve road safety for all drivers.

🔒 Cybersecurity Incidents

A major cyberattack on Intoxalock in March 2026 disrupted services for thousands of drivers across 46 states. This incident affected device calibrations and functionality, causing significant inconvenience for many users. As cybersecurity threats increase, ensuring device reliability is crucial.

💰 Costs of Ignition Interlock Devices

The costs associated with ignition interlock devices have remained significant. Installation fees typically range from $70 to $150. Monthly monitoring fees can vary from $50 to $120, which adds up to an annual total of $1,000 to $2,400, excluding installation and calibration fees.

These expenses can be a considerable burden for those required to install a device.

🔧 Device Functionality and Compliance

Ignition interlock devices require drivers to blow into a mouthpiece to start their vehicles. If the breath-alcohol reading exceeds the limit, the car will not start. In Washington State, compliance rates have been low, with only 41% of drivers required to install a device actually complying between January 2018 and June 2025.

This issue raises concerns about the effectiveness of current enforcement measures.

📌 Key Points to Remember

  • 🔍 North Carolina proposed a bill for broader ignition interlock requirements.
  • ⚠️ A cyberattack on Intoxalock affected thousands of users.
  • 💵 Installation and monitoring costs can be significant.
  • 🚗 Ignition interlock devices prevent impaired driving but face compliance challenges.
  • 📉 Low compliance rates in Washington State indicate enforcement issues.

💡 Tips for Managing Ignition Interlock Devices

Reviewing your specific situation with an attorney is essential to understanding your obligations regarding ignition interlock devices.

📝 Understand Installation Requirements

In Arizona, individuals must submit an Ignition Interlock Device Application to the Motor Vehicle Division. This step is crucial for compliance with state laws.

⏳ Stay Aware of Calibration Schedules

Calibration visits are necessary every 30 to 90 days, depending on the state. Drivers should keep track of these appointments to ensure their devices function properly.

📞 Utilize Customer Support

Many ignition interlock providers have customer support available 24/7. If you encounter issues with your device, contacting support can help resolve problems quickly.

👀 Monitor Compliance Reports

If you are required to use an ignition interlock device, be aware that missed tests or device malfunctions could be logged. Monitoring these reports can prevent legal complications.

💼 Explore Financial Assistance

In Washington State, resources are available for individuals needing help with the costs of ignition interlock devices. Checking with local agencies can provide options for financial support.

❓ Frequently Asked Questions

🤔 What happens if I don’t install the ignition interlock device on time?

If you fail to install the device within 30 days of your conviction in Arizona, your driving privileges may be suspended immediately. This can lead to an extension of the interlock requirement.

🏎️ Can I drive without an ignition interlock device?

If you are required to have an ignition interlock device due to a DUI conviction, driving without it can result in legal penalties. It is important to comply with your state’s regulations.

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

Calibration visits are required every 30 to 90 days, depending on the state you are in. Failing to follow the calibration schedule can lead to compliance issues.

🚗 What is a rolling retest?

A rolling retest is a prompt from the ignition interlock device while driving. It requires the driver to blow into the device to ensure they are not impaired while operating the vehicle.

💬 What if my ignition interlock device malfunctions?

If your device malfunctions, it is important to contact your service provider immediately. They can assist with troubleshooting or arrange for repairs to ensure compliance.

🔄 Can I move my ignition interlock service center?

If you relocate, you must submit an IID Vendor's Information Change form and a new application, including applicable fees. This ensures your device remains compliant with state laws.

⚖️ Recent Cases Related to Ignition Interlock Devices

Recent court rulings have addressed various aspects of ignition interlock devices, including compliance, penalties, and legislative actions. These rulings reflect the ongoing efforts to enhance road safety and regulate impaired driving effectively.

For more recent rulings, feel free to check out more rulings on the news page.

End of October 2026 Update





The object of the Ignition Interlock device (IID) is to restrict drivers who are above the legal limit of alcohol from driving.  It is designed to prevent a vehicle from starting if the driver fails to give a breath sample under the BAC limit that has been pre-programmed into the device. IID’s are used as an alternative to sentencing those charged with driving under the influence. 


In recent studies, the International Council on Alcohol, Drugs and Traffic Safety states that when IID’s are installed and monitored properly and on a normal basis, there was a 40-95% decrease in the rate of repeat DUI offenses. This rate was based on offenders with the IID’s remaining on their vehicle. The benefits of having these devices installed in a vehicle of a DUI offender are great.

Ignition Interlock Purpose


The device can help them realize the impact their driving makes on others around them, and their safety. The device can be installed independently or can be court ordered. Usually when it is court ordered, it is in place of or in conjunction with a worse sentence, or a provision to probation or parole. Some offenders do not realize the danger they pose to themselves and others by becoming a repeat offender, and sometimes it’s a tough decision courts have to make.


A judge can give a first time DUI offender a smaller fine and no sentence, therefore he/she doesn’t feel the full punishment. A month goes by and they’re back on the road while under the influence and get into an accident, where someone else is injured. The judge would now feel guilty for not having imposed a bigger sanction on this person, when he was just trying to be lenient to a first time offender. This is where this decision becomes a morally tough one for a judge to make, so the IID assists in that aspect.


The IID is an alternative to harsher sentencing, and serves as a monitor to prevent the person from repeating their offense as long as the device is installed. The device is a constant guide monitoring all the activities of the driver, therefore cannot be tampered with or bypassed. After the car is started with a clean breath sample, the device will demand more during operation to assure that the same person is behind the wheel and no further alcohol has been consumed. If the person fails to provide a clean sample, a series of alarms will go off to alert others on the road, especially law enforcement.


Even if the person was to pull over and shut the car off until they have sobered up, they won’t get away with attempting to trick the device. Once the data is downloaded and monitored during a device calibration, it will be evident what the offender has attempted. The judge may then impose a larger fine or even suspend the person’s license.


IID’s have proven to be highly effective in keeping drunk drivers off the roads. They have also assisted repeat offenders in learning from their past mistakes, and keeping them in line from further committing offenses. The general public believes IID’s to be an effective method to lower the number of drunk drivers, and DUI offenses, accidents, and accident-related deaths across the U.S. and Canada.