Understanding How Ignition Interlock Devices Impact Your Driving Privileges After a DUI Conviction in Florida


When you’re convicted of a DUI in Florida, the court may require the use of an ignition interlock device (IID) as part of your penalty. Understanding how these devices work, when they’re required, and how they affect your driving privileges is essential. Florida takes DUI cases very seriously, and ignition interlock devices are a tool to reduce repeat offenses and improve road safety. Let’s take a closer look at how these devices impact those convicted of a DUI and the laws governing their use in Florida.


What Is an Ignition Interlock Device?

An ignition interlock device is a breathalyzer installed in a vehicle to prevent it from starting if alcohol is detected in the driver’s system. The device requires the driver to provide a breath sample before starting the car and may prompt additional samples while the vehicle is in motion. If the IID detects a blood alcohol concentration (BAC) above a preset limit—typically 0.025 in Florida—the vehicle will not start or may issue a warning to stop driving.

The devices are connected directly to the vehicle’s ignition system. They are designed to ensure compliance with DUI penalties, reduce recidivism, and allow drivers to regain some level of mobility while serving their DUI penalties.


When Are Ignition Interlock Devices Required in Florida?

The Florida Department of Highway Safety and Motor Vehicles (FLHSMV) oversees ignition interlock requirements under state law. The conditions under which an IID is required vary based on the number of prior DUI convictions, the severity of the offense, and other factors, as outlined in Florida Statute § 316.193.

  1. First DUI Conviction:

    • If a driver’s BAC was 0.15 or higher or a minor was in the vehicle at the time of the offense, an IID is mandatory for at least six months.
    • For a standard first DUI, an IID may not be required unless specifically ordered by the court.
  2. Second DUI Conviction:

    • An IID is required for at least one year, regardless of BAC level.
  3. Third DUI Conviction:

    • An IID is mandatory for a minimum of two years.
  4. Fourth or Subsequent Convictions:

    • An IID is required for a minimum of five years.

How Ignition Interlock Devices Are Installed and Maintained

To comply with ignition interlock requirements, individuals must work with a state-approved vendor. These vendors install the device in your vehicle, provide instructions on how to use it, and monitor compliance. The device must be calibrated and maintained regularly, often monthly, to ensure it functions correctly.

Costs associated with IIDs include:

  • Installation fees: Typically ranging from $75 to $150.
  • Monthly monitoring fees: Usually $60 to $100.
  • Removal fees: Around $50.

These expenses are the responsibility of the individual ordered to install the IID, though financial hardship waivers may be available in some cases.


How Ignition Interlock Devices Impact DUI Arrests and Convictions

The presence of ignition interlock devices can influence DUI cases in several ways. For individuals facing DUI charges, the prospect of being required to use an IID may motivate them to fight their case more aggressively. From a broader perspective, IIDs are credited with reducing repeat DUI offenses, making Florida’s roads safer.

However, compliance is critical. Failing to install the IID as required or tampering with the device can result in severe penalties, including additional license suspensions, fines, or even jail time. These devices also record data, such as failed breath tests or missed appointments, which can be reported to the court and used as evidence of non-compliance.


Legal Consequences of Ignition Interlock Device Violations

Violating IID requirements can lead to significant legal consequences. Under Florida Statute § 322.2715, failing to comply with IID installation or maintenance requirements can result in:

  • Extended time periods for IID use.
  • Additional license suspensions.
  • Criminal charges for tampering with the device or attempting to circumvent its function.

Fighting a DUI Charge and Avoiding Ignition Interlock Requirements

Being convicted of a DUI in Florida doesn’t always mean you’re automatically subject to ignition interlock requirements. Working with an experienced DUI defense attorney can help you explore potential defenses to your charge, including:

  • Challenging the legality of the traffic stop or arrest.
  • Questioning the accuracy of breathalyzer or blood test results.
  • Arguing procedural errors in your case.

In some cases, charges may be reduced to reckless driving or dismissed altogether, which could eliminate the need for an IID.


FAQs About Florida DUI and Ignition Interlock Devices

How does an ignition interlock device work?
An ignition interlock device measures the alcohol content in a driver’s breath. Before starting the vehicle, the driver must blow into the device. If the device detects a BAC above the legal limit, the vehicle will not start. Some devices also require “rolling retests” during a trip to ensure the driver remains alcohol-free.

When will I be required to install an IID after a DUI conviction?
Ignition interlock devices are typically required in Florida for individuals convicted of a DUI with a BAC of 0.15 or higher, if a minor was in the vehicle, or for repeat DUI offenses. The length of time varies based on the specifics of the case, as outlined in Florida Statute § 316.193.

Can I avoid using an ignition interlock device if I plead to a lesser charge?
In some cases, a skilled DUI attorney can negotiate a reduction in charges, such as from DUI to reckless driving. This may remove the requirement for an IID. However, outcomes depend on the specifics of your case and the evidence presented.

Who pays for the installation and maintenance of the IID?
The costs associated with ignition interlock devices, including installation, monthly monitoring, and removal, are the responsibility of the individual ordered to install the device. Financial assistance may be available for those who demonstrate hardship.

What happens if I fail a breath test on an ignition interlock device?
If you fail a breath test, the device will prevent the vehicle from starting. Additionally, failed attempts are logged and reported to the monitoring agency, which can lead to penalties, including extended IID use or additional legal consequences.

Can I drive someone else’s car if I’m required to use an IID?
No. If you’re ordered to use an ignition interlock device, you’re only permitted to drive vehicles equipped with the device. Driving another vehicle can result in severe penalties, including additional license suspensions and possible criminal charges.

What should I do if my IID malfunctions?
If your ignition interlock device malfunctions, contact the approved vendor immediately. They can inspect, repair, or replace the device as needed. Continuing to drive without addressing the issue may be considered non-compliance.

Are ignition interlock devices effective in preventing repeat DUIs?
Studies have shown that ignition interlock devices significantly reduce the likelihood of repeat DUI offenses while they are installed. By requiring alcohol-free breath samples to start a vehicle, these devices act as a safeguard for public safety.

Can tampering with an IID result in additional penalties?
Yes. Under Florida Statute § 322.2715, tampering with an ignition interlock device or attempting to bypass its functions is a criminal offense. Penalties include extended IID use, fines, or even jail time.

How can a DUI lawyer help if I’m required to use an IID?
An experienced DUI lawyer can help you understand the IID requirements and explore ways to reduce or eliminate this penalty. By challenging the evidence in your case, your lawyer may be able to secure a more favorable outcome, such as a reduced charge or dismissal.

Contact Musca Law 24/7/365 at 1-888-484-5057 for your FREE consultation.

If you’re facing DUI charges in Florida, it’s essential to understand your rights and the potential consequences, including the use of ignition interlock devices. Contact Musca Law 24/7/365 at 1-888-484-5057 for your FREE consultation. Musca Law, P.A. has a team of experienced criminal defense attorneys dedicated to defending people charged in Florida with a criminal or traffic offense. We serve all 67 counties in Florida and are available 24/7/365 at 1-888-484-5057 for your FREE consultation.