Brand Certified
Intoxalock Ignition Interlock
4.0(1 review)
Certified by Intoxalock Ignition Interlock • Mar 01, 2026
Business Details
1887 Old Hwy 94, St Charles, MO
63303, United States
Certified by Intoxalock Ignition Interlock • Mar 01, 2026
(636) 283-6683
Certified by Intoxalock Ignition Interlock • Mar 01, 2026
https://www.intoxalock.com/locations/mo/st-charles/1887-old-hwy-94-12064
Certified by Intoxalock Ignition Interlock • Mar 01, 2026
About
Certified by Intoxalock Ignition Interlock • Mar 01, 2026
Car Inspection StationIntoxalock
Get back on the road confidently with Intoxalock, the trusted Ignition Interlock Device (IID) provider of St-Charles, Missouri and the no. 1 interlock device brand in the U.S.. Located in the Saint Charles neighborhood at 1887 Old Hwy 94, we offer fast and affordable court-approved IID installation, calibration, and removal services. Our certified technicians ensure a smooth, stress-free experience while helping you stay compliant with Missouri interlock laws. With 24/7 customer support, Intoxalock makes the process easy for drivers to regain their licenses after a DUI. Visit us in MO near you or call our state specialists to schedule your car breathalyzer installation and get back on the road safely!
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Certified by Intoxalock Ignition Interlock • Mar 01, 2026
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Certified by Intoxalock Ignition Interlock • Mar 01, 2026
Reviews
4.0
1 reviews
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- BOBrian O'NeillNov 16, 20254.0I was impressed by intoxalock and their employees. they really care and go above and beyond to make sure i had everything i needed to drive legally, interlock device is working great, insurance, service center and all done on the phone. professionalism, easy to communicate with their team members well and customer satisfaction seem to be keynotes for this business thanks for helping me to get back on the road and i think your device works very well. i recommend you every chance i get! respectfully, -Brian O'Neill Saint Charles, MO
Frequently Asked Questions About Intoxalock Ignition Interlock
How does an interlock device work?
An ignition interlock device (IID) is a small breathalyzer installed in your vehicle to prevent it from starting if alcohol is detected on your breath. Before driving, you'll blow into the device. If your breath alcohol concentration (BrAC) is below the programmed limit, the car starts. Periodic retests occur during your trip to ensure continued compliance. To read more on Intoxalock, you can read our ignition interlock device guide.
What is the cost of an ignition interlock device?
The installation of an ignition interlock device, often called a car breathalyzer, typically costs between $70 and $150. This one-time fee is paid at the start of your lease and covers the service center's labor to install the device in your vehicle. Payment is made directly to the service center at the time of installation. For more on cost breakdowns, you can read our cost of ignition interlock device guide.
How do I use my interlock device?
Using an IID is simple. To start your vehicle, blow into the device as directed. If the device detects no alcohol, your car will start. You may be prompted for "rolling retests" while driving, where you’ll blow into the device again to confirm compliance. How-to videos are also available on the Intoxalock mobile app.
Where do I get an ignition interlock device?
Ignition interlock devices can be installed at certified service centers nationwide. Intoxalock offers a convenient network of locations and helps you schedule an installation appointment near you. Visit our Intoxalock locations page or call us to find the nearest service center and begin the installation process.
How long will my installation take?
Installing an ignition interlock device typically takes 1-2 hours, depending on your vehicle type. Certified technicians ensure the device is properly installed and provide you with training on how to use it. Contact Intoxalock for an appointment and an accurate time estimate for your installation.
What happens if I fail a breath test on my ignition interlock device?
If you fail a breath test, your vehicle will not start, and the device will log the event. Depending on your state’s regulations, multiple failed tests may trigger additional penalties, such as lockouts or reporting to your monitoring authority. Intoxalock devices allow you to retest after a short wait if alcohol is no longer detected. Always follow your state’s guidelines to remain compliant.
Can I install an ignition interlock device in a vehicle I don’t own?
Yes, in most cases, you can install an ignition interlock device in a vehicle you regularly drive, even if you’re not the registered owner. However, the vehicle owner must provide consent for the installation. Intoxalock works with you and the owner to ensure compliance with state regulations and the successful setup of the device.
What should I do if my ignition interlock device locks me out?
If your ignition interlock device locks you out, it’s usually due to missed tests, failed tests, or state-specific requirements. Intoxalock offers a simple lockout override process in most cases to help you get back on the road quickly. Contact Intoxalock customer support for assistance and to understand the steps needed to resolve the issue.
What services does Intoxalock Ignition Interlock offer in St Charles, MO?
Intoxalock Ignition Interlock in St Charles provides court-approved ignition interlock device installation, calibration, and removal services to help you stay compliant with Missouri interlock laws.
How can I schedule an ignition interlock installation at Intoxalock in St Charles?
You can schedule an installation by calling Intoxalock specialists or visiting their website to book an appointment at the St Charles location.
What are the operating hours for Intoxalock Ignition Interlock in St Charles?
The St Charles location is open Monday through Friday from 9:00 AM to 6:00 PM, and closed on Saturdays and Sundays.
How long does the installation of an ignition interlock device take at Intoxalock?
Installation typically takes 1-2 hours depending on your vehicle type, performed by certified technicians who also provide usage training.
How does the ignition interlock device work?
The device is a breathalyzer installed in your vehicle that prevents it from starting if it detects alcohol on your breath. You must blow into the device before driving and periodically during your trip for continued compliance.
What happens if I fail a breath test on the Intoxalock ignition interlock device?
If you fail, your vehicle won't start and the event is logged. Multiple failures may lead to penalties depending on state laws. You can retest after a short wait if no alcohol is detected.
Are there nearby automotive repair shops to Intoxalock Ignition Interlock in St Charles?
Yes, Don's Auto Service and Excel Auto Body are nearby and can assist with additional automotive repairs or services while you visit Intoxalock.
Is there food nearby Intoxalock Ignition Interlock in St Charles?
Yes, Domino's Pizza and Sazón MICH Paletería y Nevería are close by if you want to grab a meal or a snack before or after your appointment.
Can I find other automotive parts stores near Intoxalock in St Charles?
Yes, several stores like Mighty Distributing of the Midwest and Mighty Auto Parts are nearby to serve your automotive parts and accessory needs.
Does Intoxalock accept credit and debit cards at their St Charles location?
Yes, the St Charles service center accepts both credit and debit card payments for your convenience.
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