The most common questions about ignition interlock devices and car breathalyzers, answered. If your question is not listed, contact us at (877) 275-3974 and we can help.
An ignition interlock device, or car breathalyzer, is a small alcohol monitoring device that is wired into a vehicle’s ignition system to prevent drunk driving. The device requires the driver to take a breath alcohol content, or BrAC, test before they can start the car. To do so, the driver provides a breath sample using the device, which then measures the alcohol content.
Each state is responsible for setting the legal limit for these BrAC tests, which is different from the legal threshold for DUI. While a DUI threshold is typically .08 percent (except in Utah where it’s .05 percent), for a BrAC sample the limit is much lower. If the driver’s breath sample is measured above the lower set limit, the vehicle will not start.
Throughout most trips, the interlock device will request random retests to ensure the driver stays sober and prevent tampering. The interlock device also tracks the user’s activity. Violations and tampering attempts are also recorded and provided to the monitoring authority in the relevant state.
We’ve done the research so you don’t have to.
We took into account cost, convenience, device reliability, state certification, suspension history, ratings, and customer reviews when researching. You can read our in-depth findings as you explore different providers. We hope it will guide you in your decision.
The most important thing you will need to verify is that you have court approval to install your device, if it is mandated by the court. This will ensure you follow policy and get credit for your installation. Get your paperwork in order and verify that your chosen provider is approved, and make your appointment.
Some IID users do not install because they were required by the court. Instead, some customers choose to install it as an aid, ensuring sober driving, or to protect their teen drivers from driving drunk. Anyone can have a device installed at any time, if they wish to.
This depends on the circumstances of your offense, and your state law. A state specialist can help with specific questions. It should be made clear during your court proceedings that an interlock will be required as well.
We’ve researched state policies for you. Check your state’s page to see approved providers. Additionally, your attorney or the court should be able to tell you who these approved providers are.