Smart Start Ignition Interlock
Marathon Auto Air2525 Overseas Hwy
Marathon, FL 33050
#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!
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 Marathon Auto Air in Marathon
Smart Start has over 25 years’ experience in the industry and nearly 2,000 convenient locations nationwide. You can trust us to get you back on the road as soon as possible. Installation is convenient and quick, pricing is straightforward, and our customer service is unparalleled. You are in good hands with Smart Start!
Smart Start Marathon provides their Ignition Interlock services at Marathon Auto Air off 2525 Overseas Highway. Shop owner, John, and his team also offer automotive repair, tire, and AC services. You can find us next to Subway, right off State Road A1A. We look forward to serving you!
Call Smart Start Marathon today to schedule an installation appointment at (305) 521-5019 or fill out our online form. Check out other locations in the Marathon and Florida Keys area!
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 Florida:
- 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 Florida 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 Florida.
Ignition Interlock Device violation criteria can vary by state. Any and all of the following may constitute a violation in Florida:
- 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 Florida, 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
Estrella Insurance
5107 Overseas Highway
Marathon, FL 33050
CLOSED – Opens at 9:00am We
Services at this Location:
Sign Up, Manage Account, Informational Videos
Boosted Auto’s LLC
201 Industrial Rd
Big Pine Key, FL 33043
CLOSED – Opens at 9:00am We
Services at this Location:
Installations, Calibrations
Estrella Insurance
338 N Krome Ave
Homestead, FL 33030
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
December 24, 2025
"Very helpful with phone review and setting everything up and very professional "
Gordon S.
United States
December 24, 2025
"Friendly, informative and too the point"
Alec S.
United States
December 24, 2025
"Tracey was Very helpful and polite ."
James Schuster.
United States








