Ignition Interlock Device Requirements in Arizona

After a DUI conviction in Arizona, getting behind the wheel again often means installing an Ignition Interlock Device (IID)—a breathalyzer connected to your vehicle’s ignition system.  At the Law Offices of T. M. Allen, we help clients navigate IID mandates, compliance, violations, and early removal options to restore normal driving as soon as possible.  This detailed guide covers who needs an IID, how long, costs, rules, and tips for success.

When Is an IID Required? (ARS § 28-1461 and Related Statutes)

Arizona is an “all-offender” state—any DUI conviction requires an IID for at least 12 months (minimum for first offenses).  Key triggers:

• First standard DUI: Minimum 12 months (possible 6-month deferment in some cases).
• Extreme DUI (BAC 0.15%+): 12+ months.
• Super Extreme DUI (BAC 0.20%+): Often 18–24 months.
• Repeat offenses (within 84 months): 12–24+ months, or longer for aggravated cases.
• Refusals or certain violations: Can trigger or extend IID requirements.

The court orders the IID as part of sentencing or reinstatement.  For some, a Special Ignition Interlock Restricted Driver’s License (SIIRDL) allows restricted driving during suspension if IID installed early (e.g., after 90 days served).

How the Device Works

1. You blow into a mouthpiece before starting the car.
2. If alcohol is detected (typically above 0.02–0.025%), the vehicle won’t start.
3. Rolling re-tests required while driving; camera and GPS monitor usage.

Tampering, bypassing, or missed tests reported to MVD—leading to extended requirements, suspensions, or new charges.

Costs and Installation

Installation: $50–$200 (varies by provider).

Monthly monitoring/calibration: $70–$100+ (varies by provider).

Removal/calibration fees extra.

Total first-year cost often $1,000–$2,000+ (varies by provider).

Financial hardship may qualify for reduced fees in some programs.

Compliance Tips and Violations

Calibrate every 30–90 days.

Avoid mouthwash, hand sanitizer, or fermented foods before driving.

Don’t let others blow into the device (prohibited).

Violations (e.g., failed re-test, tampering) extend IID time or revoke privileges.

Early removal possible for first offenses (post-2012, no extremes, clean 7-year record) after minimum periods.

Our Role in Your IID Journey

We advise on negotiating shorter IID terms, handling violations, and expediting reinstatement.  Contact the Law Offices of T. M. Allen for DUI defense and IID guidance.

Disclaimer: This post is for informational purposes only and is not legal advice.  Reading does not create an attorney-client relationship.  Laws vary by state and individual circumstances.  If you have questions about your specific situation, consult with a qualified attorney.