When is an Ignition Interlock Required in Tennessee
October 11, 2023
Home » Insights »

When is an Ignition Interlock Required in Tennessee?

Tennessee law requires that a person convicted of a DUI must have an ignition interlock device installed on their vehicle if that person is eligible for a restricted driver's license. This device allows the vehicle to start only if the person has a blood alcohol content of 0.02% percent or less. An ignition interlock device is required for any person convicted of a DUI if that person is allowed to drive for certain reasons.  

DUI First Offense

Tennessee law, codified at Tenn. Code Ann. §55-10-404(a)(1)(A) mandates that a person convicted of a DUI first offense must have their license suspended for one year. The suspension penalties are longer for subsequent DUI offenses with a suspension of two years for a second DUI conviction, six years for a third offense, and eight years for a fourth or more offense.  

But, a person convicted of a DUI can apply for a restricted drivers’ license under another part of Tennessee’s DUI laws. Under this law, codified at Tenn. Code Ann. §55-10-409, the person convicted of a DUI may apply for a restricted drivers’ license. The judge in most circumstances can allow the person to have a restricted drivers’ license – but only if an ignition interlock device is placed in the vehicle.  

Ignition Interlock Requirements

Tennessee law, codified at Tenn. Code Ann. 50-10-417, further gives judges the power to require a person convicted of a DUI to drive their vehicle – after their one-year suspension of driving privileges – to install an ignition interlock device for a period of one year after their one-year suspension.  

The bottom line is that if you get a DUI conviction, you will have to place an ignition interlock device on your vehicle if you want a restricted drivers’ license during the time your drivers’ license privileges are suspended and you may have to install such a device even after that one-year suspension period.

Local Lebanon DUI Attorneys

Learn more about your specific case. Contact a Wilson county Tennessee attorney, by contact our Lebanon TN law firm for a scheduled consultation.

The information provided on this blog is meant for general informational purposes only and should not be construed as medical or legal advice. While we strive to provide accurate and up-to-date information, we make no representations or warranties of any kind regarding the completeness, accuracy, reliability, or suitability of the blog content. Any reliance on this information is at your own risk. This blog may discuss legal topics, but for advice specific to your situation, consult a qualified attorney. We do not assume responsibility for actions taken based on the information herein. We are not liable for any losses or damages resulting from the use of this blog. Links to other websites are not endorsements, and technical issues may affect blog availability. By using this blog, you agree to this disclaimer. Hagar Phillips Attorneys At Law
Recent Articles |  View All
Family Law Guide Wilson County TN
Family law in Tennessee touches some of the most important parts of life: marriage, divorce, children, and financial security. It brings together emotional decisions and detailed legal rules, which is why having clear information—and guidance—matters so much.
Read Post
Top 10 Questions to Ask Before Hiring a TN Medical License Defense Lawyer
Tennessee health professionals facing a board complaint or investigation know how much is at stake: your career, reputation, and ability to practice. Before you trust anyone with that, it helps to ask the right questions. Below are ten smart questions to ask before you hire a medical license defense lawyer in Tennessee, plus why the answers matter.
Read Post
What to Know About TN DUI Laws
Tennessee’s DUI laws just got tougher in 2026. Anyone who drives in this state, especially those already dealing with a DUI or implied consent charge, needs to understand how these changes raise the stakes for refusing tests, losing their license, and challenging evidence in court.​ While laws are subject to change, this overview highlights the most important changes and explains how Hagar & Phillips can help protect your rights under the new rules.​
Read Post