What is an Ignition Interlock Device?
Intoxalock: Your Trusted Interlock Provider
If you’re dealing with an alcohol-related driving offense, Intoxalock makes it easy to get back on the road. Our ignition interlock device (IID) are simple to use, easy to install, and our experts will guide you through every step of the process. Join over one million drivers who’ve regained their driving privileges with Intoxalock.
In this guide, we’ll explain what an IID is, how it works, how much it costs, and more. We’re here to help you get your license back and back behind the wheel.
What is an Ignition Interlock Device (IID)?
An IID, sometimes called a car breathalyzer, is a small device installed in your car that prevents you from driving if you’ve been drinking. It works by requiring you to blow into it, checking your Breath Alcohol Content (BrAC) before allowing the car to start.
How Long Do I Need an Ignition Interlock Device?
How long you need an IID depends on the laws in your state. Each state sets its own rules about when you need the device, how long you must keep it installed, and who monitors your compliance (e.g., court, DMV, probation officer).
Our team of state specialists is here to help you understand your specific requirements, so you can get your license reinstated as soon as possible. Once you’ve met your state’s conditions, you’ll be able to have the IID removed and fully reinstate your driving privileges.
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How Does an Ignition Interlock Device Work?
An ignition interlock device is easy to use and helps ensure you're safe to drive. Once installed, it works like this:
Blow into the device
Before starting your car, you'll blow into the device to check your Breath Alcohol Content (BrAC). If your BrAC is below the legal limit (usually 0.02), your car will start.
Random retests
While driving, the IID will request random breath samples to ensure you remain sober throughout the trip. Intoxalock’s one-button system makes retesting simple and safe.
Failed tests
If you fail a test, your car won’t start. If you fail a random retest, you’ll be prompted to pull over safely. The device will not shut off your car while it's running, but some states may require additional actions, like honking the horn or flashing lights, until the car is turned off.
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What About Random Retests While Driving?
Once your vehicle is started, an ignition interlock device will require you to continue providing breath samples throughout the duration of your trip. This ensures the vehicle is continuously operated by someone who meets the breath alcohol concentration (BrAC) requirements.
While driving, the device will ask for random breath samples to make sure you remain sober throughout your trip. Don’t worry—Intoxalock’s one-button design makes it easy to provide a sample without distraction. If you fail a retest, you’ll be prompted to pull over safely. Some states require your horn to honk or your lights to flash until you turn off the car.
How Much Does an Ignition Interlock Cost?
IIDs are leased, not bought, and typically cost between $70 and $120 per month. The total cost may vary depending on:
- Your state’s requirements
- The type of vehicle you drive
- Any extra features you may need, such as a camera or GPS
Our team will help you understand all costs upfront, so there are no surprises.
Where Do I Go for Ignition Interlock Device Installation?
Intoxalock has over 5,000 installation locations nationwide. Our state-certified providers will install your IID quickly and make sure you know how to use it before you leave.
Ready to Get Back on the Road?
Intoxalock makes it easy to get your ignition interlock device installed and get back behind the wheel. Call us today at 877-272-5195 to get a quote and schedule your installation! Our experts are ready to help you through every step of the process. Don’t wait—get started today!
