An ignition interlock device is a breath-testing device that is installed in a vehicle and is connected to the ignition, horn and headlights. To start the vehicle, a driver must blow into the device without registering a blood alcohol concentration (BAC).
Missouri law requires any person guilty of a second or subsequent intoxication-related traffic offense to install an ignition interlock device on any vehicle they operate before reinstating driving privileges.
Each ignition interlock provider is responsible for reporting ignition interlock compliance to the Department of Revenue and/or the court-ordered supervising authority.
To view the Administrative Rules which establish the standards for the Breath Alcohol Ignition Interlock Device Certification and Operational Requirements visit http://www.sos.mo.gov/adrules/csr/current/7csr/7csr.asp.
If you are required to have an ignition interlock device installed, call the manufacturers listed below to obtain information regarding installation, pricing and locations around the state. Make sure that the device you have installed is one of the approved devices listed below.
Name of Manufacturer |
Approved Device |
Customer Service Number |
| Guardian Interlock |
AMS 2000 |
800-499-0994 |
| Draeger |
Interlock XT and Interlock 7000 |
877-854-2569 |
| Consumer Safety Technology |
Intoxalock - Model 1001A |
877-777-5020 |
| Alcohol Detection Systems |
Determinator DM-904 and Determinator 2 |
888-786-7384 |
| Smart Start |
SSI 20/20 and SSI 20/30 |
800-880-3394 |
| Lifesafer |
FC-100 |
800-765-1188 |
Additional Resources:
BAIID Tracking System
Frequently Asked Questions
Mothers Against Drunk Driving
Substance Abuse Traffic Offenders Program
Department of Revenue, Driver License Bureau
Traffic Injury Research Foundation
National Highway Traffic Safety Administration
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