Interlock of St. Louis specializes in installing Certified Ignition Interlock devices. We offer flexible hours plus weekends & evenings too! You'll find our services to be cost effective, and your Interlock device easy to use. We'll strive to make you feel comfortable in our professional facilities.

• We're Expanding - visit the Locations Page
• Latest Technology - We use Drager Interlock Devices
• You can now start a Corporate Account for your Fleet of vehicles.
• We can install our Interlock on your Motorcycle.

We have a dependable, knowledgeable staff who also cares about your safety. Our installations are performed by experienced technicians and all wiring is insured. Should you ever need our 24/7 Emergency Support, it will be with us, people you know.