December 15, 2022

Getting an Interlock Device After DUI in Arizona

Getting an interlock device on your car after a DUI can be stressful. But successfully complying can help you get back on road.

Table of Contents

Table of Contents

Contributors & Editors

Dane Perikly

Director of Virtual Services & DUI Education

Last Update on June 5, 2023

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Getting an interlock device on your car after a DUI can be stressful. But successfully complying can help you get back on road and start to move towards putting your DUI behind you. Here’s what you need to know about interlock devices in the state of Arizona.
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Why does Arizona make DUI offenders have Interlock System?

An interlock system is designed to prevent repeat offenders from returning to public roads by requiring them to pass a breathalyzer test before starting their car. Installing one of these devices may seem inconvenient, but it’s important to remember that it helps keep everyone safe on the roads.

Individuals convicted of DUIs in Arizona who must have an interlock device installed must also participate in an education or treatment program and pay fines and court costs. The state may also require that the driver cover all installation and monthly service fees associated with using the interlock system.

How do you begin the process of getting an interlock device? 

Several steps must be taken and followed closely for individuals convicted of DUIs who are required to use an interlock system in Arizona.

First, individuals must find an authorized service provider approved by the state’s Motor Vehicles Department (MVD).

This service provider will install wires connecting a breathalyzer unit directly into your vehicle’s ignition or fuel injection systems; installation fees typically range between $100-$200 depending on location and how long installation takes.

In addition, monthly fees are associated with servicing these devices, ranging from $60 to $90 per month, depending on location.

Driving With Your Interlock

Once an interlock system is installed in your vehicle, understanding how these systems work is key to completing any required tests.

Drivers must blow into a mouthpiece attached to the device each time they attempt to start their car; if alcohol is detected on the breath sample, then the engine will not start until after a certain amount of time has passed (typically between 5-15 minutes).

In addition, Arizona requires individuals to submit regular “rolling retests,” which involve taking another breath test while driving at set times determined by law enforcement agencies, such as every 15 minutes during peak hours or every 30 minutes during off-peak hours.

Interlocks can be frustrating but remember this.

Getting an interlock system after a DUI conviction in Arizona can be costly financially and emotionally. However, it’s important to remember that this device helps keep everyone safe on public roads by reducing impaired driving incidents due to alcohol consumption. Following all rules related to your interlock device and avoiding any future DUIs are essential for staying safe, protecting others on the roads from potential harm caused by drunk drivers, and keeping yourself out of further trouble with law enforcement.


[1] Arizona MVD: Interlock Device Information

[2] Arizona MVD: Approved Interlock Device Companies

Published: 12/15/2022

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Author & Reviewers

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Dane Perikly


Dane is the Director of Virtual services at Cornerstone. He contributes guides on DUI education so that you can understand all there is to know about DUI charges, education, and the overall process of meeting Arizona requirements after a DUI. He cares deeply about raising awareness of the dangers of DUI and illustrating the impact on victims and on those charged. 

lionel estrada lisac clinical director

Lionel is the Clinical Director of Cornerstone’s Scottsdale treatment facilities. He has had over 4 years at Cornerstone. He is personally in recovery and passionate about helping others overcome substance abuse and mental health challenges, he is trained as an EMDR, adopting a trauma-informed approach to treat the underlying issues of conditions.

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