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*Guardian Interlock, LLC is no longer accepting new interlock customers in the State you selected. Please contact LifeSafer for all of your ignition interlock needs.

Choose from any of our conveniently located 1,500 locations.
Call now for your special interlock offer!

How Does An Ignition Interlock Work?


Blow into the ignition interlock device before starting your vehicle. If the sample meets the state requirement, it will start.


Ignition Interlock installation is easy with our experts. Find an installer near you.


Your ignition interlock device will need to be serviced every 30, 60, or 90 days. Service dates will vary by state.