Ignition Interlock Device in Arizona

TL;DR

Every DUI conviction in Arizona requires an ignition interlock device under A.R.S. 28-3319. Standard first-offense DUI requires 12 months. Extreme DUI requires 12 months. Super extreme requires 18 months. Aggravated DUI requires 24 months or longer. Costs typically run $70-100 per month plus installation and removal fees.

Arizona requires an ignition interlock device (IID) for every DUI conviction. Not just for repeat offenders. Not just for high BAC cases. Every single one. A first-offense misdemeanor DUI at 0.08% BAC carries the same interlock mandate as a third-offense aggravated felony DUI. The difference is how long the device stays on your vehicle.

Under ARS §28-3319, the Arizona Motor Vehicle Division (MVD) will not reinstate your driving privileges after a DUI conviction unless you install and maintain a certified ignition interlock device. This is not optional and not subject to judicial discretion. The statute is mandatory.

This guide covers everything about Arizona’s IID program: who must install one, how long it stays on your vehicle, what it costs, what happens if you violate the requirements, and how to get through the process without making things worse.

What Is an Ignition Interlock Device and How Does It Work?

An ignition interlock device is a breathalyzer wired into your vehicle’s ignition system. Before you can start the car, you blow into the device. If your breath alcohol concentration (BrAC) registers above the programmed limit (typically 0.02% in Arizona), the vehicle will not start.

The device is roughly the size of a cell phone and mounts near the steering column or dashboard. A certified technician installs it, connecting it to your vehicle’s starter circuit.

The Startup Test

Every time you want to start the vehicle, you provide a breath sample. You blow into the mouthpiece with a specific pattern (usually a hum-and-blow technique designed to prevent someone from using an air pump or balloon). If the sample is clean, the vehicle starts normally. If not, the device locks you out for a set period, usually a few minutes for the first failed attempt, with increasing lockout times for repeated failures.

Rolling Retests

The IID does not just test you at startup. While you are driving, the device will prompt random rolling retests, typically every 15 to 45 minutes. You have a short window (usually about six minutes) to provide a passing sample. If you fail or ignore the retest, the device does not shut off the engine (that would be a safety hazard on the highway), but it triggers an alarm. The horn honks, the lights flash, and the violation is logged. The alarm continues until you pull over and either provide a clean sample or turn off the vehicle.

Data Logging and Camera Units

Modern IID units record every event: startup tests, rolling retests, failed attempts, skipped tests, power disconnections, and tampering attempts. This data is downloaded at each calibration appointment and reported to the court, your probation officer, and MVD.

Many Arizona IID providers now install camera-equipped units. A small camera photographs whoever is blowing into the device. This prevents the most common workaround people try: having a sober passenger provide the breath sample. If the photos show someone other than the registered driver providing samples, that information goes straight to the court.

Who Must Install an IID in Arizona?

Arizona law requires interlock installation for all DUI convictions. The list includes:

First-offense standard DUI (ARS §28-1381). BAC of 0.08% or higher (0.04% for commercial vehicle operators). Even a first-time misdemeanor DUI conviction triggers the IID requirement. There is no exception for clean driving records or otherwise sympathetic circumstances.

Extreme DUI (ARS §28-1382). BAC of 0.15% or higher. The interlock period and other penalties increase significantly. Arizona treats extreme and super extreme DUI as separate, more serious offenses.

Super extreme DUI. BAC of 0.20% or higher. Same interlock mandate, but the overall penalty structure is harsher.

Second DUI within 84 months (7 years). A second DUI conviction within the lookback period results in longer interlock requirements and a one-year license revocation.

Aggravated DUI (ARS §28-1383). This is a class 4 or class 6 felony. Aggravated DUI applies when someone drives on a suspended, revoked, or cancelled license, commits a third DUI within 84 months, or drives DUI with a passenger under 15. The interlock requirement for aggravated DUI is the longest.

Drug DUI. Arizona’s DUI statute covers impairment from drugs, not just alcohol. If you are convicted of a drug-related DUI under ARS §28-1381(A)(1), the court will still order interlock installation, even though the device only detects alcohol. The legal reasoning is that the IID requirement attaches to the conviction, not the specific substance.

How Long Must the IID Stay Installed?

The duration depends on the offense. These are the minimum periods required by ARS §28-3319. Courts can order longer periods, but they cannot order shorter ones.

First standard DUI: 12 months. This is the baseline. The clock starts when the device is installed and you have obtained your IID-restricted driving permit, not from the date of conviction or the date of your arrest.

First extreme DUI (0.15%+ BAC): 12 months. While extreme DUI carries heavier jail time and fines, the interlock period for a first offense remains 12 months.

First super extreme DUI (0.20%+ BAC): 18 months. The higher BAC pushes the interlock requirement beyond the standard 12-month window.

Second DUI within 84 months: 12 months following the one-year revocation period. Because your license is revoked for a full year before you can even apply for a restricted license, the practical effect is that you will have an IID for closer to two years total.

Aggravated DUI: 24 months following reinstatement eligibility. For a felony DUI with a three-year license revocation, this means the IID could be on your vehicle for five years from the date of conviction.

These durations assume zero violations during the interlock period. Any violation (a failed test, a missed calibration appointment, evidence of tampering) can reset or extend the clock.

The IID-Restricted License: Driving During Suspension

One of the most practical aspects of the IID program is that it allows people to drive during what would otherwise be a total license suspension. After a DUI conviction, MVD suspends or revokes your license. For many people, this means they cannot get to work, take their children to school, or handle basic life obligations.

Under Arizona’s DUI license suspension framework, you can apply for a special ignition interlock restricted driving permit. This permit allows you to operate any vehicle equipped with a certified IID during the suspension period. You are not limited to driving only your own vehicle, but every vehicle you drive must have an interlock installed.

How to Get the Restricted Permit

The process involves several steps. You must complete any required screening through an approved DUI education or treatment program. You must obtain SR-22 insurance (high-risk auto liability coverage). You must have the IID installed by a certified provider. Then you submit the application to MVD along with proof of all of the above.

The restricted permit is not automatic. MVD reviews the application, and processing times vary. You should expect several weeks between your conviction and actually having the restricted permit in hand. During that gap, you cannot legally drive.

Restrictions on the Permit

The IID-restricted permit is not a full license. It allows you to drive to and from work, school, medical appointments, court-ordered obligations, and other essential purposes. Some permits include broader privileges, but the specifics depend on your case and what the court orders. You must carry the restricted permit at all times while driving, along with proof of IID installation.

ADOT-Certified IID Providers in Arizona

Arizona requires that IID installation, calibration, and removal be performed only by providers certified through the Arizona Department of Transportation (ADOT). You cannot buy a device online and install it yourself. You cannot go to a general mechanic.

ADOT maintains a list of approved vendors. The major national providers operating in Arizona include Intoxalock, Smart Start, LifeSafer, and Draeger. Each has multiple service locations across the state, concentrated in the Phoenix and Tucson metro areas but also available in smaller cities like Flagstaff, Prescott, and Lake Havasu City.

When choosing a provider, consider location (you will be visiting every 30 to 60 days for calibration), cost, device reliability, and customer service. A device that malfunctions frequently creates problems beyond inconvenience. A false-positive reading gets reported as a violation, and you then have to fight that report in front of the court or MVD.

IID Costs: What You Will Pay

The IID is an out-of-pocket expense for the convicted driver. The state does not pay for it, and most auto insurance policies do not cover it.

Installation fee: $75 to $150. This covers the initial installation appointment where a technician wires the device into your vehicle. The cost varies by provider and by vehicle type. Older vehicles or vehicles with complex ignition systems may cost more.

Monthly lease and monitoring: $60 to $100 per month. The device itself is leased, not purchased. The monthly fee covers the equipment rental, data transmission to the monitoring authority, and general maintenance. Over a 12-month period, this amounts to $720 to $1,200.

Calibration appointments: Typically included in the monthly fee, but some providers charge separately. Calibration must occur every 30 to 60 days (set by court order or MVD requirement). During calibration, the technician downloads the data log, recalibrates the sensor, and inspects the unit for signs of tampering.

Removal fee: $50 to $100. Once your interlock period is complete and MVD authorizes removal, the technician disconnects the device and restores your vehicle’s ignition to its original configuration.

Total estimated cost for a 12-month period: $1,500 to $2,500. For longer interlock periods (18 or 24 months), multiply accordingly.

Some providers offer income-based discounts or payment plans. If the cost creates a genuine financial hardship, your attorney can sometimes negotiate with the court for a reduced-cost provider or a modified payment arrangement.

What Happens When You Fail an IID Breath Test

Failing a breath test on the interlock triggers a specific sequence of events, and none of them are good.

At the Device Level

If you fail the startup test, the vehicle will not start. The device locks out for a short waiting period (usually two to five minutes), then allows you to try again. If you fail a second time, the lockout period increases. After three or more consecutive failures, some devices enter an extended lockout that can last several hours. Every failed attempt is logged with a timestamp and the recorded BrAC reading.

If you fail a rolling retest while driving, the device activates the alarm (horn honking, lights flashing) and logs the event. You need to pull over safely and either provide a clean sample or shut off the engine.

At the Reporting Level

All failure data is transmitted to the IID provider, which reports it to MVD and, depending on your case, to the court and your probation officer. A single isolated failure with a low reading (0.025%, for example) may be treated differently than repeated high readings or a pattern of failures at specific times.

MVD reviews the data and can take action including extending your interlock period, suspending your restricted permit, or requiring you to appear at a compliance hearing. If you are on probation, your probation officer may file a petition to revoke your probation based on the IID violation.

Common Causes of Unexpected Readings

Not every failed test means you were drinking. Certain foods and substances can trigger a false positive on the device. Mouthwash containing alcohol is the most common culprit. Others include fermented foods (sauerkraut, kombucha, some breads), cough syrup, and certain medications. Even spicy food or energy drinks have been reported to cause low-level readings on some devices.

The best practice is to rinse your mouth with water and wait at least 15 minutes after eating or drinking anything before providing a sample. If you get a reading you believe is inaccurate, wait for the lockout period to expire, rinse your mouth thoroughly, and retest. A clean retest within a short window helps demonstrate that the original reading was a false positive.

Tampering and Circumvention: Criminal Penalties Under ARS §28-1464

Arizona takes IID tampering seriously. Under ARS §28-1464, it is a class 1 misdemeanor to:

Tamper with the device. This includes disconnecting, bypassing, or physically altering the IID or its wiring. Technicians inspect for tampering at every calibration appointment. The devices also have internal sensors that detect power interruptions, voltage anomalies, and physical interference.

Have someone else provide a breath sample. This is the most common form of circumvention. Camera-equipped devices have made this much harder to get away with. Even without a camera, the data logs can reveal patterns (clean startup tests at locations where the registered driver is known not to be) that suggest someone else is blowing.

Operate a vehicle without an IID when one is required. If you are under an interlock order and drive a vehicle that does not have an IID installed, you have committed a separate criminal offense.

Solicit someone to blow into the device for you. Even asking someone else to provide a sample is a violation, whether they actually do it or not.

A conviction under ARS §28-1464 can result in up to six months in jail and fines up to $2,500, on top of whatever penalties you already face for the underlying DUI. It also virtually guarantees that your interlock period will be extended.

IID Violations and Their Consequences

Beyond outright tampering, there are several types of IID violations that can create problems.

Missed calibration appointments. If you do not bring your vehicle in for calibration within the required window, the device will eventually enter a permanent lockout. Your vehicle will not start. MVD will also be notified that you are out of compliance. Driving with a locked-out device (if you somehow manage to start the vehicle) is itself a violation.

Repeated failed tests. One or two isolated failed tests over a 12-month period may not trigger formal action, particularly if they are followed by clean retests. But a pattern of failures, especially at high readings, will draw scrutiny from the court and MVD.

Power disconnections. Unplugging your car battery, whether to “reset” the device or for legitimate vehicle maintenance, gets logged and reported. If you need to have your vehicle serviced, notify your IID provider in advance. Some providers issue a temporary bypass code or work with the mechanic directly.

Driving an unequipped vehicle. If your interlock order covers all vehicles you operate and you drive one without an IID, law enforcement can charge you with a separate offense. This also counts as a probation violation if you are on supervised probation.

The consequences of IID violations vary by severity and frequency. They can include extension of the interlock period (often an additional six months per violation), additional criminal charges, probation revocation proceedings, and suspension of the IID-restricted permit.

Employer Vehicle Exemption

Arizona law provides a narrow exemption for employer-owned vehicles. If you drive a vehicle owned by your employer in the course of your employment, you may not be required to install an IID on that specific vehicle. However, several conditions apply.

Your employer must be notified of your interlock requirement. The employer must provide written consent acknowledging that you will be operating their vehicle without an IID. This consent form is typically filed with MVD and the court.

The exemption does not apply if you own or co-own the business. It does not apply if the vehicle is provided primarily for your personal use (a company car that you take home, for example). And the exemption only covers driving during the scope of employment. Driving the employer’s vehicle to run a personal errand is not covered.

As a practical matter, disclosing your DUI conviction and IID requirement to your employer is something most people would prefer to avoid. But driving an employer vehicle without the required IID and without the proper exemption paperwork in place creates serious legal exposure for both you and the employer.

IID and Commercial Vehicles: CDL Holders

If you hold a commercial driver’s license (CDL), Arizona’s interlock requirements intersect with federal CDL regulations in ways that create additional complications.

A DUI conviction in any vehicle (commercial or personal) triggers a one-year disqualification of your CDL under federal law. A second DUI triggers a lifetime disqualification. The IID requirement applies to your personal vehicle, but you cannot install an IID on a commercial motor vehicle and continue to operate it commercially.

The practical result is that CDL holders convicted of DUI face a period where they cannot drive commercially at all, followed by reinstatement requirements that include the IID on their personal vehicle. The interlock does not restore commercial driving privileges. Those follow a separate reinstatement path through MVD and compliance with federal Motor Carrier Safety Administration rules.

For CDL holders, a DUI conviction threatens their livelihood in ways that go beyond the interlock requirement. The points assessed by MVD and the CDL disqualification period compound the problem.

Can You Get the IID Removed Early?

In most cases, no. Arizona’s interlock requirement is statutory, meaning it comes from the legislature, not from the judge. The minimum periods set by ARS §28-3319 are just that: minimums. Courts cannot reduce them.

Some people confuse the interlock period with probation. Probation can sometimes be terminated early upon petition. The IID requirement is independent of probation. Even if a court grants early termination of probation, the MVD interlock requirement remains in effect until the statutory period is complete.

The only realistic path to earlier removal involves situations where the interlock was ordered beyond the statutory minimum. If a judge ordered 18 months when the statute only requires 12, it may be possible to petition the court to reduce the order to the statutory minimum. This is case-specific and depends on the judge and the circumstances.

The clock on your interlock period can be extended for violations, but it cannot be shortened below the statutory floor.

Tips for Living with an Ignition Interlock Device

Having an IID on your vehicle for 12 to 24 months is disruptive, but manageable if you know what to expect.

Avoid alcohol-containing products before driving. This goes beyond not drinking. Mouthwash, hand sanitizer (the fumes can register), cough medicine, and certain foods can cause low-level readings. Rinse with water and wait at least 15 minutes after using any product that might contain alcohol before providing a sample.

Keep your calibration appointments. Mark them on your calendar. Set reminders. A missed appointment creates problems that are entirely avoidable. Most providers allow you to schedule online or by phone, and many offer flexible hours including weekends.

Keep your vehicle battery charged. If the battery dies or is disconnected, the device logs it as a potential tampering event. If your vehicle sits for extended periods, consider a battery maintainer. If you need a jump start, document the circumstances and notify your IID provider.

Inform your mechanic. Before any vehicle service that involves the electrical system, tell the shop about the IID. Better yet, have your IID provider coordinate with the mechanic. An uninformed mechanic who disconnects the battery or the device itself can trigger a tampering report.

Keep water in the car. A quick rinse before each test reduces the chance of a false positive from residual food or drink.

Budget for the cost. At $60 to $100 per month, the IID is a real expense. Factor it into your budget from the start so a missed payment does not result in device removal and a compliance violation.

Do not let anyone else blow into the device. Even if your spouse wants to “help” by starting the car for you, this is a crime under ARS §28-1464. The camera will capture it, and the data logs will show an inconsistency.

How the IID Connects to License Reinstatement

The interlock device is one piece of a larger license reinstatement puzzle after a DUI conviction. Full reinstatement of your unrestricted license requires:

Completion of the IID period with no violations in the final months (MVD looks at your compliance record). Completion of all court-ordered DUI education or treatment programs. Payment of all fines and fees, including the MVD reinstatement fee. Maintaining SR-22 insurance for the required period (typically three years from the date of reinstatement). Clearing any outstanding MVD holds or suspensions unrelated to the DUI.

Once MVD is satisfied that all conditions are met, they will authorize removal of the IID and issue you an unrestricted license. The removal must be performed by your certified IID provider, who will submit documentation to MVD confirming the device has been properly removed.

Do not remove the device before receiving written authorization from MVD. Unauthorized removal is treated as tampering.

Arizona Compared to Other States

Arizona’s IID requirements are among the strictest in the country, and this is consistent with the state’s overall approach to DUI enforcement.

Many states only require interlock devices for repeat offenders or for first offenders with a BAC above a certain threshold (often 0.15%). Arizona requires it for every DUI conviction, regardless of BAC level or offense number. Some states allow judges to waive the interlock requirement under certain circumstances. Arizona does not.

A handful of states have adopted similar all-offender IID mandates (including New Mexico, Louisiana, and Virginia), but Arizona pairs the IID requirement with some of the harshest DUI penalties in the nation: mandatory jail time for even a first offense, mandatory fines, mandatory alcohol screening, and a mandatory license suspension before the restricted permit kicks in.

The result is a system where Arizona DUI offenders face more concurrent requirements than drivers in almost any other state. The IID is not a standalone penalty. It operates alongside jail time, fines, probation, education programs, insurance requirements, and MVD points. Managing all of these obligations simultaneously requires careful attention and, in most cases, experienced legal guidance.

Frequently Asked Questions

How much does an ignition interlock device cost in Arizona? Plan for $75 to $150 for installation, $60 to $100 per month for monitoring and calibration, and $50 to $100 for removal. Over 12 months, the total ranges from roughly $1,500 to $2,500. Longer interlock periods cost proportionally more.

Can I drive any vehicle with an IID-restricted permit? You can drive any vehicle that has a certified IID installed. The restricted permit is not tied to one specific vehicle. However, every vehicle you operate must be equipped with the device. The limited employer vehicle exemption is the only exception.

What happens if I fail a rolling retest while driving? The device will not shut off your engine. It will activate your vehicle’s horn and lights as an alarm and log the violation. You should pull over safely, rinse your mouth with water, wait a few minutes, and provide another sample. The failed test will be reported at your next calibration.

Is the interlock requirement the same for a drug DUI? Yes. Arizona requires IID installation for all DUI convictions, including those based on drug impairment. The device only tests for alcohol, but the legal requirement attaches to the DUI conviction itself, not to the specific substance involved.

Can a judge waive the ignition interlock requirement? No. Under ARS §28-3319, the IID requirement is mandatory for all DUI convictions. Judges cannot waive it, reduce the minimum duration, or substitute an alternative. The statute leaves no room for judicial discretion on this point.

What foods or products can cause a false positive? Mouthwash containing alcohol is the most frequent cause. Others include kombucha, energy drinks, certain cough syrups, hand sanitizer fumes, fermented foods, and some breads made with active yeast. Rinsing with water and waiting 15 minutes before testing significantly reduces the risk.

Will my insurance rates go up because of the IID? The IID itself does not directly raise your rates, but the underlying DUI conviction will. Arizona requires SR-22 insurance (a high-risk liability certificate) after a DUI, which typically costs significantly more than standard coverage. The SR-22 requirement usually lasts three years.

Can I get the interlock removed before the minimum period expires? In almost all cases, no. The minimum duration is set by statute and cannot be shortened by the court. If a judge ordered a period longer than the statutory minimum, it may be possible to petition for reduction to the minimum, but this is uncommon.

Protect Your Driving Privileges After a DUI Charge

The ignition interlock requirement is just one part of Arizona’s DUI penalty structure. How you handle the IID process, from installation timing to calibration compliance to the eventual removal, directly affects your ability to get your full driving privileges back.

If you are facing a DUI charge in Arizona or have questions about your interlock obligations, the attorneys at Rideout Law Group can walk you through every step of the process.

Scottsdale Office: 480-584-3328 Lake Havasu City Office: 928-854-8181

Related Resources From Rideout Law

Key Takeaways

A.R.S. 28-3319 mandates an IID for every DUI conviction. There is no judicial discretion to waive it.
First-offense standard DUI: 12 months IID; extreme DUI: 12 months; super extreme: 18 months; aggravated: 24+ months.
Failed breath samples and missed rolling retests trigger lockouts and may extend the IID period.
Costs include installation ($75-150), monthly monitoring ($70-100), and removal ($50-100).
Tampering with the device or driving a non-IID vehicle during the IID period is a separate criminal offense.

Arizona Statute References

Statute citations in this article reference the Arizona Revised Statutes (A.R.S.). Read the full text on the Arizona Legislature website:

A.R.S. 28-3319: Arizona Revised Statutes
A.R.S. 28-1381: Arizona Revised Statutes
A.R.S. 28-1382: Arizona Revised Statutes
A.R.S. 28-1383: Arizona Revised Statutes

Talk to a Rideout Law Group Attorney

If you are facing criminal charges in Arizona, the decisions you make in the first few days can shape the rest of your case. Rideout Law Group represents clients across Maricopa and Mohave County from offices in Scottsdale and Lake Havasu City.

Call (480) 584-3328 for a free consultation, or contact us online to schedule a confidential review of your case.

Legal Disclaimer

This article is provided for general informational purposes only and does not constitute legal advice. Reading this post does not create an attorney-client relationship between you and Rideout Law Group. Every criminal case turns on specific facts, court of jurisdiction, and procedural posture. If you are facing charges in Arizona, consult a licensed Arizona criminal defense attorney about your individual situation. Past results do not guarantee future outcomes.