We’re expanding to serve you better! We now have more locations so you're never far away. We have over a decade of experience and will do everything possible to help you become a safer driver.

• Mulitple Locations - With flexible hours - Weekends & Evenings
• Easy to use & discreet! - No humming required - Small, high tech device.
• Reliable equipment - Meets or exceeds Federal performance standards - Keeps your vehicle absolutely reliable!
• Client Recommended - For a professional, pleasant, worry-free experience
• Dependable, knowledgeable staff - Who also cares about your safety
• 24/7 Emergency Support - With local people you know - Us!
• Interlock training - We train you on the use of our interlock device & MO interlock program parameters
• Professional Facilities - For training & routine service appointments
• Experienced & insured installers - We can work with any vehicle
• Motorcyclists - we can install our Interlock on your bike.

Not only does Interlock of St. Louis have a great reputation, they are also very cost effective. So, save yourself time and money by coming to us first. Don’t trust your vehicle to just anyone! Our installations are performed by experienced & insured technicians and all wiring is insured.