Smart Start Ignition Interlock
Rock Hill to County Tire & Auto Service9730 Manchester Rd
Rock Hill, MO 63119
#1 Ignition Interlock from $1.99/day*. Same-day installation available
Services at this Location:
- Installations
- Calibrations
Book an Installation
With the thousands of locations across the nation, 24/7 customer support, no hidden fees and the most reliable device on the market, Smart Start Ignition Interlock devices are hands-down the best way to get you back on the road fast.
Get a quick and easy IID installation with Smart Start! Get started today!
¡Obtenga una instalación rápida y fácil de IID con Smart Start! ¡Empieza hoy mismo!
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Why Choose Smart Start Ignition Interlock?
From $1.99/Day* - No Long-Term Contracts
Bi-weekly payment options designed to fit your budget.
IGNITION INTERLOCK COSTS3,000+ Locations - Same Day Install
Quick installs by skilled technicians at convenient U.S. locations.
FIND A LOCATIONDiscreet, Easy-to-Use Devices
Reliable, hygienic devices with guided tests and easy English-Spanish switching.
SMART START DEVICES24/7 Knowledgeable State Program Experts
Multilingual support trusted by over 1 million people, ready when you need us.
TALK TO A PROGRAM ADVISOR#1 Ignition Interlock Device Provider at Rock Hill to County Tire & Auto Service in Rock Hill
Located along the Historic Route 66 is Rock Hill, Missouri. Home to more than 4,500 residents, this city is located just 20 minutes outside of St. Louis. This well-preserved suburb showcases the historic Fairfax House which dates back to the mid-1800s when the town was settled. This house was the initial gathering place for all residents at the time.
Today, many Rock Hill residents travel to and from the nearby city. As the largest provider of Ignition Interlock Devices (IID) in Rock Hill, Missouri – and across the U.S. – we’re proud to play a role in keeping the community safe. If you’ve got a DUI in Rock Hill or the surrounding area, Smart Start has the quality Ignition Interlock you need.
We Install Ignition Interlock in Rock Hill, Missouri
You can count on County Tire & Auto Service – Rock Hill for fast, affordable installation of Ignition Interlock Devices in Rock Hill. You’ll get quality installation by knowledgeable professionals who will get you started with Missouri’s best IID Program.
They’ll be with you every step of the way, from installation and periodic maintenance to removal. You’ll also have access to our around-the-clock customer care, staffed by trained, multilingual professionals who want to help you succeed in your IID requirement.
Schedule your IID installation today. Call (573) 840-3370 or fill out our online form. You can trust Smart Start to provide outstanding Ignition Interlock service in Rock Hill, Missouri. You can find other convenient Smart Start locations in St. Louis, Chesterfield or throughout Missouri.
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Frequently Asked Questions
The overall cost of an Ignition Interlock Device is a combination of installation fees, monthly service fees, and removal fees. Exact pricing varies by state. To get a quote today, call (800) 831-3299 to speak with a friendly Program Advisor.
Once you have scheduled your Ignition Interlock Device (IID) installation with Smart Start, you will need to bring the following to your IID installation appointment in Missouri:
- Two valid forms of identification—one of which should include a photo of you.
- Proof of residence.
- Any and all court documents that may be relevant to your Ignition Interlock Device requirement or your restricted driving period.
- Vehicle registration. If you do not own the vehicle on which you’re installing the Ignition Interlock Device, or if that vehicle is not registered to you, you will need to bring a letter of permission from the registered owner stating that you are allowed to install an Ignition Interlock Device on the vehicle.
- The vehicle on which you’ll be installing an Ignition Interlock Device (IID).
If you have any additional questions or concerns about the installation process or what is required for a successful installation, please don’t hesitate to call our customer care team at (800) 831-3299. You can also click on the chat window below to begin a discussion with one of our customer care advocates.
You may be able to service your Ignition Interlock Device at any Smart Start service center nationwide. However, we strongly suggest checking with your state authority in Missouri before seeking service outside of your state. Find the nearest Smart Start service center here.
Ignition Interlock Device violation criteria can vary by state. Any and all of the following may constitute a violation in Missouri:
- A skipped rolling retest
- Tampering with the Ignition Interlock Device in any way
- Any breath sample that registers a BrAC above .02 percent
- Missing your scheduled IID service appointment
Learn more about Ignition Interlock Device violations.
Typically, you will need to service your Ignition Interlock Device (IID) once every 30-60 days or as determined by your jurisdiction in Missouri.
In Missouri, you can pay for your Interlock Device calibration via credit card at the Smart Start service center at the time of calibration or via the online Client Portal.
Nearby Locations
Community Services of Missouri
8980 Watson Road
Saint Louis, MO 63119
CLOSED – Opens at 9:00am We
Services at this Location:
Sign Up, Manage Account, Informational Videos
Missouri Ignition Interlock Devices
249 Wolfner Dr
Fenton, MO 63026
CLOSED – Opens at 10:15am We
Services at this Location:
Installations, Calibrations
Eastern Missouri Alternative Sentencing Services
9553 Lackland Road
Overland, MO 63114
CLOSED – Opens at 9:00am We
Services at this Location:
Sign Up, Manage Account, Informational Videos
See What Everyone Says About Our Ignition Interlock
Excellent TrustScore Rating
June 18, 2025
"Bill was great! He was extremely friendly and explained everything very clearly to me. He was incredibly knowledgeable. Highly recommend!"
Brianna F.
United States
June 18, 2025
"They talked me through everything "
Kaylyn D.
United States
June 18, 2025
"My friend tell me about it "
Esaie E.
United States