RoadGuard Interlock offers ignition interlock devices (IIDs) for your car. Our IIDs are reliable and easy to use, and we offer installation services at our location in Saint Charles, IL. We are committed to helping our customers achieve their ignition interlock requirements and get back on the road.

Smart Start is the #1 Ignition Interlock Device provider in Saint Charles with same-day installation available for your vehicle. We’re a convenient and affordable Illinois IID supplier located in Central Saint Charles at 615 S Randall Road, with mobile services and price matching available to give you the best value. Our reliable customer service experts and licensed technicians will make... Read More about Smart Start Ignition Interlock