Tennessee certified ignition interlock installers are located throughout the state.

Tennessee has certified ignition interlock installers in cities across the state. A person required by a court or the Tennessee Department of Safety to have an approved ignition interlock installed must use one of these approved installers for the alcohol breathalyzer device. This means the driver of the vehicle with an ignition interlock device (IID) installed is required to blow into the device before starting the car. If a certain level of alcohol is detected the vehicle will not start. The costs of installation, maintenance, and monitoring fall on the user of the ignition interlock device. Other ignition interlock fees may also be required in Tennessee.

The following list provides the names of certified ignition interlock providers in Tennessee, organized by city, and with contact information provided.  The ignition interlock companies currently approved may change over time and the Tennessee Department of Safety should be contacted if you cannot find an IID provider company in your area.

Alcoa, TN:

• C.S.T. – Hayes Alignment Service  (877) 777-5020

Antioch, TN:

• C.S.T. – Cartronics of Antioch  (877) 777-5020

Brentwood, TN:

• C.S.T. – Cartronics of Brentwood  (877) 777-5020

Chattanooga, TN:

• B&T Automotive Service Inc.  (423) 267-9232, (423) 266-3030

Clarksville, TN:

• C.S.T. – Sonus Car Audio, LLC,  (877) 777-5020

Jackson, TN:

• Radio Performance and More  (731) 660-1717, (731) 660-1762

Johnson City, TN:

• Bio-Tech Services, LLC  (423) 230-1770
• C.S.T. – American & Import Auto Repair  (877) 777-5020
• East Tennessee Ignition Interlock  (423) 926-9112, (423) 926-8800

Knoxville, TN:

• Central Tire & Alignment  (865) 688-9892
• C.S.T. – Car One, Inc.  (877) 777-5020

Lebanon, TN:

• J&R Electronics  (615) 443-1989

Madison, TN:

• C.S.T. – Cartonics of Madison  (877) 777-5020

Manchester, TN:

• Valvoline Express Care  (931) 728-5851

McKenzie, TN:

• Tri County Motor Company  (731) 352-7925

Memphis, TN:

• Bobbie Smith Auto Body  (901) 527-2734
• C.S.T. – Sound Waves, Inc.  (877) 777-5020
• Superior Interlock Inc. (800) 377-8750

Nashville, TN:

• Draeger Safety Diagnostics  (615) 399-4160, (615) 399-4198
• Nashville Auto Trim  (615) 834-0908

Newport, TN:

• Drive Safe  (865) 322-7238, (423) 623-1358

Sweetwater, TN:

• Jacky Jones Ford Lincoln Mercury  (423) 337-5066

Union City, TN:

• Precision Tint  (731) 884-0310

West Tennessee

• Superior Interlock Inc. (800) 377-8750

For further information on the ignition interlock program and other driver license issues visit the Tennessee Department of Safety Driver Services.