Smart Start Ignition Interlock
Twisted Wrench Customs703 N Jefferson
Ava, MO 65608
#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 Twisted Wrench Customs in Ava
Need an Ignition Interlock in Ava? Get back on the road with Smart Start, Missouri’s ultimate Ignition Interlock Device provider. We make your Ignition Interlock program simple, affordable and reliable with 24/7/365 customer service and easy, quick tests. You’ll receive hands-on training with our friendly, licensed technicians until you are comfortable testing with your Ignition Interlock.
We look forward to serving you! Smart Start Ava, MO is located at Twisted Wrench Customs off 703 N Jefferson.
Call in today at (417) 686-5015 or fill out our online form to schedule your installation appointment. Be sure to ask about any current state specials or discounts!
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.
Typically, you will need to service your Ignition Interlock Device (IID) once every 30-60 days or as determined by your jurisdiction in Missouri.
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.
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
FCC BEHAVIORAL HEALTH
808 North Jefferson
Ava, MO 65608
CLOSED – Opens at 8:00am Mo
Services at this Location:
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FCC BEHAVIORAL HEALTH
9871 E 20th St
Mountain Grove, MO 65711
CLOSED – Opens at 8:00am Mo
Services at this Location:
Sign Up, Manage Account, Informational Videos
Professional Insurance & Financial Services
1455 W South Street
Ozark, MO 65721
CLOSED – Opens at 9:00am Mo
Services at this Location:
Sign Up, Manage Account, Informational Videos
See What Everyone Says About Our Ignition Interlock
Excellent TrustScore Rating
July 26, 2025
"Sandra was a complete professional and took the time and care to answer all of my concerns and questions. I am very satisfied with the service I received from her."
Andrew M.
United States
July 26, 2025
"The person who helped me today was willing, kind, informative, and positive. She made this dreadful task easy for me."
Raymond E.
United States
July 26, 2025
"Great help and nice to talk to"
Tracin S.
United States