Ignition Interlock Devices in Tennessee

When is an IID Authorized?

Tennessee has authorized the use of ignition interlock devices (IIDs) for certain drivers convicted of alcohol related driving offenses.

When are IIDs Authorized?

Tennessee courts authorize an ignition interlock device to be in operation during the entire time period a restricted license is in place and must continue to be in operation six months after the license revocation period has ended. The license suspension periods are:

·      first offense: one year

·      second offense: two years

·      third offense: six years

·      fourth or subsequent offense: eight years

 What’s an IID?

An IID connects to the vehicle dashboard and the driver breaths into the device prior to starting the vehicle. If the IID detects a BAC above the limit programmed the device (typically calibrated at .02%), then the engine won’t start. Read more about ignition interlock devices (IIDs).

Where Can I Find an IID Provider?

IID providers are approved for installation throughout Tennessee. You can find a list of approved IID providers at the Tennessee Department of Safety website.

Who Pays For it?

In almost all cases the driver who has been convicted of a DUI/DWI pays for the installation and lease of the ignition interlock system. You can expect to pay up to $100 for installation (although some companies offer free installation) and between $75-$120 per month for the lease. This is a rough estimate and your price may be higher or lower depending on your location.

 

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