How an

Ignition Interlock

Device Works
How an Ignition Interlock Device Works
If you are convicted of driving under the influence (DUI) in Arizona, there are many possible penalties you could face. One example is being required to have an ignition interlock installed on your vehicle. This is a breathalyzer that connects to your vehicle and prevents it from starting if it detects alcohol. More information about how an ignition interlock device works:

Installing an Ignition Interlock

You will need to have a device installed in every vehicle you plan to operate, whether you are the owner or not. Your driving privilege will be suspended until you do so. The Arizona Motor Vehicle Division (MVD) authorizes companies to install ignition interlocks. If a court orders you to have one of these devices, you will need to visit one of the approved installers. Since July 2018, all new devices must have a camera, GPS, and real-time reporting capabilities in addition to the breathalyzer. You will be liable for the cost of installation. This is in addition to any fines or other expenses related to your DUI penalties.

Starting a Vehicle With an Ignition Interlock

When you attempt to start a vehicle with an ignition interlock device installed, it will interrupt the signal from the ignition to the starter unless you provide a valid breath sample. You will need to blow into the breathalyzer. It will only allow the engine to start if there is no alcohol on your breath.

Random Retests

In order to prevent individuals from drinking after the initial test, ignition interlocks can require a random retest at any time. The device will alert you that a retest is required and will give you time to safely pull over in order to complete this. Never try to complete a retest while the car is moving. The device will not stop your engine if you fail the test or do not provide a sample, but it will log the violation.

Recalibrating the Breathalyzer

To ensure the device continues to work properly, it must be recalibrated and inspected every 77-90 days. The ignition interlock will also detect any tampering and you may need to visit a service center for an inspection if you interfere with the device.

Arizona Laws for Ignition Interlock Devices

Arizona Revised Statutes (ARS) 28-1464 outlines prohibited actions for individuals who must have an ignition interlock. These include:
  • Having someone else blow into the device instead of you
  • Tampering with or attempting to circumvent the device
  • Operating a vehicle that does not have a functioning ignition interlock, unless there is a "substantial emergency"
Any violation of ARS 28-1464 is a class 1 misdemeanor. In addition, the ignition interlock requirement will be extended for up to one year after it would have ended originally.

Are You Facing DUI Charges?

If you are facing DUI charges, an ignition interlock is only one of the many penalties you could face. Having an experienced DUI lawyer on your side can help you achieve the best possible outcome for your case.
Contact us today for a free consultation to discuss your DUI charge.
2929 E. Broadway Blvd.
Tucson, AZ. 85716
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