What a Smart Start ignition interlock does
A Smart Start ignition interlock is a device installed in your vehicle that measures your breath alcohol content before the engine will start. If the device detects alcohol above a set threshold — typically 0.02% blood alcohol content — the engine will not turn over. The device is wired directly to your vehicle's ignition system, so there is no way to bypass it.
Smart Start is one of several companies that manufactures and services these devices. Others include Draeger, LifeSafer, and Intoxalock. Your state's Department of Motor Vehicles or the court that ordered the interlock will specify which providers are approved in your state. You do not get to choose the brand; you choose from the approved list.
Ignition interlocks are ordered by courts as a condition of a DUI conviction or suspended license. Some states also allow them as an alternative to a full license suspension. The device stays in your vehicle for a period set by the court or your state's DMV — typically six months to three years, depending on the offense and your state's laws.
Key Takeaways
- Smart Start and other approved providers install the device in your vehicle at a cost of $50 to $150 for installation, plus $60 to $100 per month for monitoring and calibration.
- You must pass a breath test before starting the vehicle, and the device logs all attempts — failed tests are reported to the court or DMV.
- The device requires calibration every 30 days, which you schedule with the provider and pay for separately.
- Your state's DMV publishes a list of approved providers; you cannot use an unapproved device even if you pay for it yourself.
- Tampering with, removing, or attempting to circumvent the device is a criminal offense in most states and will result in additional charges.
Installation costs and monthly fees
Installation typically costs between $50 and $150, depending on your vehicle's electrical system and the provider. Smart Start's website lists pricing by state, though you should call your local Smart Start office to confirm the exact fee for your vehicle. Some providers offer a discount if you pay for several months upfront, but this is not standard.
Monthly monitoring and service fees range from $60 to $100 per month in most states. This fee covers the device's operation, data transmission to the court or DMV, and customer support. You are responsible for paying this fee for the entire period the device is installed, even if you move to another state or change vehicles.
Calibration appointments are separate from the monthly fee. You must bring your vehicle to a Smart Start service center every 30 days for a calibration check. This appointment typically costs $15 to $25 and takes 15 to 30 minutes. If you miss a scheduled calibration, the device will log a violation, which is reported to the court.
How the breath test and logging work
Before you start your vehicle, you blow into the device's mouthpiece. The device analyzes your breath and displays a result within seconds. If your blood alcohol content is below the threshold, the engine will start normally. If it is at or above the threshold, the engine will not start, and the device logs a failed test.
The device also requires a rolling retest while you are driving. At random intervals (typically every 5 to 15 minutes after startup), the device will alert you with a beep or light. You then have a set time — usually 5 to 10 minutes — to pull over safely and provide another breath sample. If you do not provide a sample or fail the retest, the device logs a violation and may trigger the horn and lights.
Every test result — passed or failed — is stored in the device's memory. When you bring your vehicle in for calibration, the technician downloads this data and sends it to the court or DMV. Repeated failed tests or missed calibrations can result in license suspension, extended interlock requirements, or criminal charges.
State-by-state approval and requirements
Each state maintains a list of approved ignition interlock providers. In most states, this list is published on the DMV website under "ignition interlock" or "DUI requirements." Some states approve only one or two providers; others approve five or more. You must use a provider on your state's approved list.
Installation and monitoring requirements also vary by state. Some states require the interlock to be installed within 10 days of a DUI conviction; others allow 30 days. Some states require the device to remain installed for a minimum of six months; others require one to three years depending on the number of prior offenses. Your court order or DMV notice will specify the exact timeline for your situation.
A few states allow you to request early removal of the device if you have maintained a clean record — no failed tests, no missed calibrations, and no violations — for a set period, usually six months. You must petition the court or DMV in writing and may be required to pay a fee for the removal and inspection.
What happens if you fail a test or miss calibration
A failed breath test is logged when ready and reported to the court or DMV at your next calibration appointment. One failed test typically does not result in when ready consequences, but repeated failures — usually three or more within a monitoring period — can trigger a license suspension or extension of the interlock requirement.
Missing a scheduled calibration appointment is treated as a violation. If you miss an appointment, the device will log the missed service, and this is reported to the court. Depending on your state and the court's discretion, a missed calibration can result in a license suspension, an extension of the interlock period, or additional fines.
Tampering with the device — removing it, disconnecting it, or attempting to bypass it — is a criminal offense in all states. Convictions for tampering typically result in additional criminal charges, fines, and an extended interlock requirement. Some states also impose jail time for tampering.
Removing the device and getting your license back
Once you have completed the required interlock period without violations, you can request removal. The process varies by state. In some states, you contact the provider directly and schedule a removal appointment. In others, you must petition the court or DMV first and receive written permission before removal.
Removal typically costs $50 to $150 and takes 30 to 60 minutes. The technician will disconnect the device, inspect the vehicle's ignition system for damage, and provide you with a removal certificate. You must keep this certificate as proof that the device was removed on schedule.
After removal, you still need to contact your state's DMV to have the interlock requirement removed from your driving record. Some states do this automatically once the provider reports the removal; others require you to submit the removal certificate in person or by mail. Check your state's DMV website or call your local office to confirm the process.
Frequently Asked Questions
Can I drive someone else's car while the interlock is required?
No. The interlock requirement is tied to you, not to a specific vehicle. Any vehicle you drive must have an approved interlock device installed. If you drive a vehicle without an interlock, you are driving with a suspended license, which is a criminal offense in most states.
What if I move to another state?
Your interlock requirement follows you. You must transfer your device to an approved provider in your new state within a set time — usually 10 to 30 days. Contact your new state's DMV to find approved providers and confirm the transfer process. You may be charged a transfer fee in addition to installation and monthly fees.
Does the device work in cold weather?
Most modern interlocks, including Smart Start devices, are designed to work in temperatures as low as -20°F. However, extremely cold weather can affect the device's accuracy. If you live in a very cold climate, ask your provider about cold-weather performance and whether your device has been tested in those conditions.
Can I get the interlock removed early?
Some states allow early removal if you maintain a clean record for a set period, usually six months. You must petition the court or DMV in writing and may be required to pay a fee. Check your court order or contact your state's DMV to learn whether early removal is an option in your case.
What if I cannot afford the monthly fees?
Contact your local Smart Start office or the provider listed in your court order. Some providers offer payment plans or reduced fees for low-income individuals, though this is not may provide. You can also ask the court whether fee waivers or reductions are available in your state. Failure to pay the monthly fee does not remove the requirement; it only results in additional violations and potential license suspension.