Ignition Interlock Arizona: Who Needs One and For How Long

An ignition interlock Arizona courts require isn’t optional paperwork. It’s a breath-testing device wired into the vehicle’s ignition. Driving without one when it’s required is its own separate crime. Almost every DUI conviction in the state now comes with an interlock requirement attached. How long it lasts depends on which tier of DUI was involved.

What an ignition interlock device actually does

The device requires a clean breath sample before the engine will start. It can also request additional “rolling” samples while the vehicle is in motion. If it detects alcohol above the programmed threshold, the vehicle won’t start. A failed rolling retest gets logged and reported automatically. Under A.R.S. § 28-1461, a certified provider must handle installation. Self-installation isn’t an option. The device also has to stay on every vehicle the person operates, not just their primary car.

How long an ignition interlock is required in Arizona

The length depends on the underlying conviction. It runs from whichever comes later: the date driving privileges become eligible for reinstatement, or the date MVD receives the report of conviction.

Standard DUI

A first-offense Standard DUI generally carries a 12-month requirement. Some first-time offenders with a clean record during the initial period can qualify for early removal after six months.

Extreme and Super Extreme DUI

Both tiers typically carry a 12-month requirement too. The underlying suspension and other conditions tend to be more restrictive than a Standard DUI, though.

Aggravated DUI

A felony-level aggravated DUI conviction commonly extends the requirement to 24 months.

Maintenance requirements while the device is installed

An installed device isn’t a one-time errand. A certified installer has to calibrate and inspect it roughly every 30 days for the first three months. After that, inspections happen less frequently. The person must also submit proof of compliance to MVD at set intervals — commonly every 90 days. Missing an inspection or failing to submit proof can suspend driving privileges indefinitely, until compliance is shown again.

What extends the ignition interlock requirement

MVD can add a six-month extension if it has reasonable grounds to believe the person tampered with or circumvented the device. The same extension applies if someone tried to start the vehicle with a BAC above the threshold more than once during the restriction period. For drivers under 21, trying to drive with any measurable alcohol at all triggers the same result. Each violation resets part of the clock. That’s why compliance during the very first weeks matters more than people expect.

What happens if you drive without a required device

Operating a vehicle without a required ignition interlock is its own crime under A.R.S. § 28-1464. The same applies if someone else blows into the device on your behalf. A conviction here typically extends the original requirement by an additional year, on top of whatever penalty follows.

The bottom line

An ignition interlock in Arizona attaches to nearly every DUI conviction. It runs a minimum of 12 to 24 months depending on the tier. It also comes with ongoing calibration and reporting obligations that don’t end at installation. Violations during the restriction period — tampering, failed retests, driving an uninstalled vehicle — extend the clock rather than resetting it to zero. Early compliance is the single biggest factor in how long the requirement actually lasts.

Keep reading

• Hit by a Drunk Driver in Arizona: Your Rights as a Victim
• SR-22 Arizona: What It Means After an Accident and How Long It Lasts

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This article explains Arizona’s general ignition interlock framework. Exact requirements, timelines, and eligibility for early removal depend on the specific conviction and MVD’s records — confirm current requirements directly with MVD or a qualified attorney.