Over 25 Locations Across Tennessee

All Smart Start Services are by Appointment Only

Interlock Xpress-Clarksville

Servicing Wednesdays 8am- 5pm

Interlock Xpress-Franklin

Servicing Tuesdays and Thursdays 8am-5pm

Interlock Xpress-Gallatin

Servicing Mondays and Thursdays 8am-5pm

Interlock Xpress-Murfreesboro

Servicing Mondays and Wednesdays 8am-5pm

Interlock Xpress-Nashville

Servicing Tuesdays 8am-5pm and Fridays 9am-2pm

Interlock Xpress-Lebanon

Smart Start of TN-Chattanooga

Servicing Monday-Friday, 8am-5pm

Smart Start of TN-Halls

Smart Start of TN-Knoxville

Smart Start of TN-Johnson City

Smart Start of TN-Bartlett

Smart Start of TN-Collierville

Smart Start of TN-Sevierville

Plaza Electronics

Customs Tint & Off Road

G-Man Services

Servicing Monday-Friday 8am-2pm, Saturday 8am-12pm

Audio Works

PDR Specialist

North Main Audio

Servicing Tuesday and Thursday, closed Wednesdays

Dennis Mitchell Automotive Center


Shaffer Muffler Shop

Hilltop Auto & Towing


Scottie Brown Auto

Lexington-Coming Soon!

Harriman-Coming Soon!

Soddy Daisy-Coming Soon!

J&J Complete Car Care

McMinnville-Coming Soon!

Shelbyville-Coming Soon!

Ripley-Coming Soon!

Covington-Coming Soon!

Morristown-Coming Soon!

New Johnsonville-Coming soon!

Ashland City-Coming Soon!

DUI Help is Here!

TN Law requires installation of a car breathalyzer for a minimum of 365 days to regain a valid TN Driver License. Smart Start is the leading Ignition Interlock installer in Tennessee. Ready to install your IID? We’re here to help you get back on the road!

Become a Smart Start Shop

Interested in installing and servicing ignition interlocks? We may be looking to add a shop in your area. Fill out the contact form and we’ll get back to you soon!