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What is an Interlock Device?

An ignition interlock device, or car breathalyzer, is a discreet device installed in a vehicle to prevent drunk driving. The device requires a driver to pass a breath alcohol content (BrAC) test before starting their car. Some devices have a camera and require the driver to record or photograph their test as well.


Learn all about IIDs from how they work to where you can have one installed.

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Installation & Removal FAQs

Find out more about the ignition interlock device installation and removal process.

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