Arizona Ignition Interlock Device Requirements After a DUI

Arizona has one of the strictest ignition interlock programs in the country — and it applies to far more drivers than many expect. An ignition interlock device, or IID, is a breath-testing unit wired into a vehicle's ignition. The driver must blow into it before the car will start, and again at random intervals while driving. A failed or skipped test gets logged and reported.

For years, interlocks were mainly associated with repeat offenders. In Arizona, that changed: even a first-time standard DUI conviction typically triggers interlock requirements lasting 6 to 12 months. The period grows with the severity of the offense — roughly 12 months for extreme DUI and 18 months for super extreme DUI — and repeat or aggravated convictions extend it further. The requirement usually begins when driving privileges are restored or when a restricted license is issued.

The device must be installed by a state-certified provider, and the driver pays for everything: installation, monthly monitoring and calibration fees, and removal at the end. Costs commonly run into the hundreds of dollars over the requirement period. Tampering with the device, having someone else blow into it, or driving a vehicle without an interlock during the restriction period can bring additional penalties, including extended restriction time.

Rolling retests are the part that surprises people most. The device demands a breath sample at random times while the vehicle is in motion. Miss one and it logs a violation; fail one and the car may enter a lockout that requires a service visit to clear. The data from every test — and every skipped retest — is reported to the monitoring authority.

Because the interlock touches daily life — work commutes, school runs, family errands — understanding the rules before installation saves headaches later. Find a qualified attorney at Justice Lookup.

Related reading: Arizona Ignition Interlock Device Requirements After a DUI

This article is general information, not legal advice. It does not create an attorney-client relationship.