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Ignition interlock device

If your license was suspended for a DUI offense, the court may require you to get an ignition interlock device to prevent a vehicle from starting if your BAC exceeds 0.05%.

Ignition interlock device requirements
  • First DUI offense: Installation of interlock device for six months to one year upon restoration (judge's discretion); BAC 0.15% or greater requires mandatory installation of ignition interlock device during license suspension and for 6 months to 1 year following restoration
  • Second DUI offense: Mandatory installation of interlock device during license suspension and for 1 to 3 years following restoration
If the court sentences you to get an interlock device, you will receive a notice of suspension from MVC with instructions on how to obtain the device. IMPORTANT NOTE: Failure to have an ignition interlock installed when ordered by a judge could result in an additional one year driving privilege suspension. For installation availability for motorcycles and autocycles please contact the listed manufacturers directly.

Approved list of ignition interlock manufacturers
Ignition interlock manufacturers have installation locations throughout New Jersey. When selecting an ignition interlock provider, consider the installation and monitoring fees and installation center site convenience.
Company Contact/Website
1A Smart Start, Inc.
500 E. Dallas Road
Suite 100
,Grapevine, TX 76051

(800) 880-3394

Alcohol Detection Systems
1718 Belmont Avenue Suite E
Baltimore, MD 21244

1-888-STOP-DUI (888-786-7384)

Best Labs
7301 West Blvd Suite A1
Boardman, OH 44512
(800) 219-9936
Draeger Safety Diagnostics
4040 W Royal Lane Suite 136
Irving, TX 75063
(856) 753- 9700
(800) 970-1002
Guardian Interlock Systems
228 Church St.
Marietta, GA 30060
(800) 499-0994
11035 Aurora Ave. Bldg. 1
Des Moines ,IA 50322
(877) 777-5020
4290 Glendale Milford Road
Cincinnati, OH 45242-3704
(800) 475-7151
Low Cost Interlock,Inc.
2038 W. Park Ave.
Redlands, CA 92373

(844) 316-7988

Simple Interlock
7100 Boulevard 26 Suite 301A
Richland Hills, TX. 76118

(844) 432-4775

FAQ's- Frequently Asked Questions
Download the most frequently asked questions [pdf] about ignition interlock devices.