Smart Start Ignition Interlock
830 Customs602 W Court St
Seguin, TX 78155
#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 830 Customs in Seguin
Smart Start is your best choice for a reliable, but inexpensive Ignition Interlock Device. Smart Start has 25 years of first-rate customer service, and our Ignition Interlock Devices are installed by qualified and licensed technicians. For any questions or concerns you may have, our Customer Care Center is accessible 24/7/365 to help, even on weekends and holidays.
Smart Start Seguin offers their Ignition Interlock services at 830 Customs, located on West Court Street next to Laser Wash. We look forward to serving you!
Call us today at (915) 304-5952 to schedule your installation appointment. We also have an online form you can fill out in just minutes. Look for other convenient Smart Start locations in Seguin, New Braunfels, San Antonio, or throughout Texas.
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.
Texas mandate dictates that you will need to service your Ignition Interlock Device (IID) once every 30-67 days as determined by your jurisdiction.
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:
- Two forms of photo identification
- Any and all court paperwork that has been given to you
- Proof of residence
- Car insurance and vehicle registration
If the vehicle is not yours, you will need to provide a letter of permission from the owner of the vehicle stating that you are allowed to install an Ignition Interlock Device.
In Texas, 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.
In Texas, any and all of the following may constitute a violation:
- Testing at or above the fail level of .030
- Skipping or failing a rolling re-test
- Missing your scheduled IID service appointment
Learn more about Interlock Device violations.
Texas state law dictates that you can service your Ignition Interlock Device at any Smart Start service center nationwide unless informed otherwise by your State authority. Find the nearest Smart Start service center here.
Nearby Locations
Elite Auto Sounds
3183 S Interstate 35
New Braunfels, TX 78130
CLOSED – Opens at 10:00am Mo
Services at this Location:
Installations, Calibrations
Audio Outlet
2626 Hunter Rd
San Marcos, TX 78666
CLOSED – Opens at 9:00am Tu
Services at this Location:
Installations, Calibrations
PowerShift Autoworks
9227 Converse Business Ln
Converse, TX 78109
CLOSED – Opens at 09:00:00 - 12:00:00 Mo
Services at this Location:
Installations, Calibrations
See What Everyone Says About Our Ignition Interlock
Excellent TrustScore Rating
December 6, 2025
"Customer Service was excellent
She was patient with me and made the experience very easy."
Victoria C.
United States
December 6, 2025
"Muy bien servicio."
Luis M.
United States
December 6, 2025
"Was very professional and friendly!!"
Teresa.
United States








