Everything You Need to Know About Getting an Ignition Interlock Device Installed

Receiving a court order for an Ignition Interlock Device (IID) can feel overwhelming — the requirements are specific, the timelines are tight, and the terminology is unfamiliar. This guide explains exactly what an IID is, how the process works, and what to expect from installation through removal.

What Is an Ignition Interlock Device?

An Ignition Interlock Device is a breathalyzer connected to your vehicle's ignition system. Before starting the vehicle, the driver must blow into the device. If the breath alcohol concentration (BAC) reading is below the programmed threshold (typically 0.02–0.04% depending on state requirements), the vehicle starts normally. If the reading is at or above the limit, the vehicle will not start.

IIDs also require random "rolling retests" — breath samples requested while the vehicle is already running — to prevent a sober third party from providing the initial breath sample.

Who Requires an IID?

Courts and state DMVs order IIDs most commonly following DUI/DWI convictions, as a condition of license reinstatement, or as part of a restricted license that allows driving during a license suspension. Requirements vary significantly by state — some states mandate IIDs for all DUI convictions; others apply them only to repeat offenders or cases above a certain BAC level.

How Does the Installation Process Work?

Step 1: Certification. Your state's DMV will have a list of approved IID providers and certified installation shops. You must use a provider on this list — uncertified installations will not satisfy the court or DMV requirement.

Step 2: Scheduling. Contact a certified installer and schedule your appointment. Bring your court order or DMV paperwork. The installation typically takes 1–2 hours.

Step 3: Installation. The device is wired into your vehicle's ignition circuit by a certified technician. No permanent damage is done to the vehicle — the system is fully removable.

Step 4: Training. Before leaving, you'll be shown how to use the device correctly — the proper breathing technique, how rolling retests work, and what to do if you encounter a situation where a retest is required while driving safely.

Step 5: Monitoring and Calibration. IIDs require regular calibration and data download appointments — typically every 30–60 days depending on your state. These appointments are not optional; missing them can be reported to the court or DMV as non-compliance. Data from the device (starts, failed attempts, rolling retest results) is recorded and reported.

Step 6: Removal. Once your required period is complete and your provider receives authorization, the device is removed. A final report is submitted to the appropriate authority.

What Should You Bring to the Appointment?

Your court order or DMV paperwork, a valid ID, and the vehicle. If the vehicle is not yours, the owner should be aware — the device will be wired to that specific vehicle.

What Provider Should You Use?

Intoxalock is among the most widely certified IID providers in the country and is available at Auto Audio in Hermantown, Minnesota. We are a certified installation center — we can handle your installation, calibration appointments, and removal, and help you understand what the reporting process looks like in Minnesota.

Call us as soon as you receive your order. Timelines are typically short, and getting installed quickly is important for your compliance record.