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Your Complete Guide to Ignition Interlock Devices in Florida




What is an Ignition Interlock Device in Florida?

An Ignition Interlock Device (IID) is a breathalyzer installed in a vehicle, requiring the driver to blow into it before the engine will start. In Florida, these devices are often mandated after a DUI conviction to prevent further incidents of impaired driving. The legal framework for ignition interlock devices is outlined in Florida Statutes Sections 316.193 and 316.1937.

What is an Ignition Interlock Device? An Ignition Interlock Device is a breathalyzer installed in a vehicle that prevents the engine from starting if the driver’s breath alcohol content is above a specified limit.

After a DUI arrest, an individual might install an IID on their vehicle voluntarily or because the court or the Department of Highway Safety and Motor Vehicles (DHSMV) ordered it. The interlock device can be installed voluntarily, even if you are not convicted of DUI or required to install it by the court or DHSMV. For example, a person might install the IID on a voluntary basis to enter a DUI diversion program.

Even if a diversion program isn’t an option, an attorney might recommend installing the IID voluntarily to negotiate a better resolution to a DUI case. After a DUI conviction, the court might order you to install an ignition interlock device. The imposition of this condition can be required or discretionary, depending on the statutory requirements for the charge.

Even if the court failed to order the placement of an ignition interlock device for the mandatory time required under Sections 316.193 or 316.1937, the DHSMV is authorized to order the installation of the IID on any vehicle owned, leased, or routinely operated by the defendant.

How Does an Ignition Interlock Device Work?

The IID uses fuel cell technology to measure the driver’s breath alcohol content (BAC). If the BAC is below 0.05%, the vehicle will start. The device also requires periodic retests while driving to ensure continuous compliance. Data from the IID is transmitted to an internet-based reporting system accessible by probation officers.

How does an Ignition Interlock Device work? An Ignition Interlock Device measures the driver’s breath alcohol content and prevents the vehicle from starting if the BAC is above 0.05%.

The equipment requires the driver to take the test again at random intervals while driving. The data obtained from the device is sent through an internet-based reporting program, which the driver’s probation officer can view at any time. The probation officer can potentially use any positive reading to violate the driver’s probation if the probationer is forbidden from consuming alcohol.

When should you install the ignition interlock device after a DUI conviction? You can wait to have the interlock device installed on a vehicle until after you have an appointment to reinstate your driving privilege if you are approved for a hardship license. So, after entering the plea to DUI, if the court suspends your license and orders you to install the ignition interlock device, you can apply for the hardship immediately after the plea (if you have a certified final disposition showing the DUI conviction).

Then, after you are approved for the hardship license at the Bureau of Administrative Reviews, you can set an appointment to reinstate your driving privileges and install the interlock device. The DHSMV does NOT require you to install the ignition interlock device before the hearing. The DHSMV will only give you credit for the time you have the interlock on their vehicle once you have valid driving privileges.

For more detailed information on DUI penalties, you can refer to our Comprehensive Guide to DUI Penalties in Florida.

Additionally, the financial burden of fines, legal fees, and mandatory programs can be overwhelming. If you’re a professional, such as a nurse or a commercial airline pilot, a DUI conviction can jeopardize your career and professional license.


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When is an Ignition Interlock Device Required in Florida?

The requirement to install an Ignition Interlock Device (IID) in Florida can be either mandatory or discretionary, depending on the circumstances of the DUI conviction. For instance, a first-time DUI conviction with a BAC of 0.08% may not always require an IID, but it becomes mandatory if the BAC is 0.15% or higher, or if there was a minor in the vehicle. Understanding the specific scenarios where an IID is required can help you navigate the legal landscape more effectively.

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Duration of Ignition Interlock Device Installation

The duration for which an IID must be installed varies based on the specifics of the DUI conviction. Here’s a breakdown of the requirements:

  • First DUI conviction: At least 6 months if ordered by the court.
  • First DUI with BAC ≥ 0.15% or minor passenger: Mandatory for at least 6 months.
  • Second DUI conviction: Mandatory for at least 1 year.
  • Second DUI with BAC ≥ 0.15% or minor passenger: Mandatory for at least 2 years.
  • Third DUI conviction: Mandatory for at least 2 years.

These durations are not arbitrary; they are stipulated by Florida law to ensure that repeat offenders and those with higher levels of intoxication are monitored more stringently. For more detailed information on DUI penalties, you can refer to our Comprehensive Guide to DUI Penalties in Florida.

When is an Ignition Interlock Device required in Florida? An Ignition Interlock Device is required for specific DUI convictions, particularly for higher BAC levels or repeat offenses.

Even if the court does not mandate an IID, the Florida Department of Highway Safety and Motor Vehicles (DHSMV) has the authority to require its installation. This can occur if the court fails to order the IID for the mandatory period specified by law. This dual-layer of enforcement ensures that individuals who pose a higher risk on the road are adequately monitored.

For example, if you are convicted of a second DUI and your BAC was 0.15% or higher, the IID installation is not just a recommendation—it’s a legal requirement. This stringent measure aims to prevent further incidents of impaired driving.

Voluntary Installation of an Ignition Interlock Device

Interestingly, the IID can also be installed voluntarily. This might sound surprising, but there are strategic reasons for doing so. For instance:

  • DUI Diversion Programs: Some diversion programs may require or recommend IID installation as a condition for participation.
  • Negotiating Better Resolutions: An attorney might suggest voluntary IID installation to negotiate a more favorable outcome in a DUI case.

Voluntary installation can demonstrate to the court your commitment to safe driving and may influence the court’s decision positively. This proactive approach can sometimes lead to reduced penalties or more lenient sentencing.

For professionals, such as nurses or commercial airline pilots, a DUI conviction can jeopardize their career and professional license. Voluntarily installing an IID can be a step towards mitigating these professional risks.

It’s crucial to adhere to all IID regulations. Failure to comply can result in severe penalties, including extended IID installation periods, additional fines, or even jail time. Here are some common violations:

  • Failing Retests: Ignoring or failing the periodic retests required while driving.
  • Tampering with the Device: Any attempt to disable or alter the IID.
  • Driving a Non-Equipped Vehicle: Operating a vehicle that does not have an IID installed.

Non-compliance can have serious repercussions. For instance, tampering with an IID is a violation that can lead to additional criminal charges. You can learn more about the consequences of tampering with an IID in our detailed article on IID tampering penalties.

Understanding when an IID is required, the duration of its installation, and the consequences of non-compliance is crucial for anyone facing a DUI charge in Florida. Navigating these legal requirements can be complex, but with the right legal guidance, you can manage the situation effectively.

For those dealing with multiple DUI offenses, understanding the escalating penalties is essential. For instance, the penalties for a third DUI within 10 years are significantly more severe than for a first-time offense. Knowing these details can help you make informed decisions about your case.

What happens if you fail to comply with IID requirements? Failure to comply with Ignition Interlock Device regulations can result in extended installation periods, additional fines, or even jail time.

By understanding the requirements and taking proactive steps, you can better navigate the complexities of DUI laws in Florida. Whether you’re dealing with a first-time offense or multiple DUIs, knowing when and why an IID is required can make a significant difference in your case.

Costs and Financial Considerations for Ignition Interlock Devices

The costs associated with installing and maintaining an Ignition Interlock Device (IID) in Florida can be significant. Typically, these costs include a $100 refundable deposit or a $5 monthly charge, $70 for installation, and $67.50 per month for calibration and monitoring. The financial burden of these expenses can add up quickly, especially for individuals already facing fines and legal fees related to their DUI conviction.

What are the costs of installing an Ignition Interlock Device in Florida? The costs include a $100 refundable deposit or a $5 monthly charge, $70 for installation, and $67.50 per month for calibration and monitoring.

It’s important to note that these costs can vary slightly depending on the service provider and the specific terms of the court order. Additionally, the court may assess your ability to pay these fees and allocate a portion of your fines to cover the costs if you are unable to pay. This can be a crucial consideration for those who are already struggling financially due to the repercussions of a DUI conviction.

Financial Assistance and Payment Plans

If you find yourself unable to afford the IID, there are options available to help manage the financial burden. Some IID providers offer payment plans that allow you to spread out the costs over time. This can make the expenses more manageable and help ensure that you remain compliant with court orders.

Moreover, the court may order that a portion of your DUI fines be used to defray the costs of installing and maintaining the IID. This provision is outlined in Florida Statute Section 316.1937(2)(d), which allows the court to allocate fines towards the costs of the IID if you demonstrate an inability to pay. This can be particularly beneficial for individuals facing significant financial strain.

For those dealing with multiple DUI offenses, the financial implications can be even more severe. Understanding the escalating penalties for repeat offenses is essential. For instance, the penalties for a third DUI within 10 years are significantly more severe than for a first-time offense. Knowing these details can help you plan and manage your finances more effectively.

Another important consideration is the potential impact on your professional life. If you hold a professional license, such as a nursing license, a DUI conviction can have serious repercussions. For more information on how a DUI can affect your professional license, you can refer to our article on DUI defense strategies for nurses.

What happens if you cannot afford an Ignition Interlock Device? If you cannot afford the IID, the court may allocate a portion of your DUI fines to cover the costs, and some providers offer payment plans to help manage the expenses.

In addition to the direct costs of the IID, there are other financial considerations to keep in mind. For example, the installation of an IID can affect your auto insurance rates. Many insurance companies view the installation of an IID as a sign of high risk, which can lead to increased premiums. It’s important to discuss this with your insurance provider to understand how your rates might be affected.

Furthermore, failing to comply with IID requirements can result in additional financial penalties. Non-compliance can lead to extended IID installation periods, additional fines, or even jail time. Ensuring that you adhere to all IID regulations is crucial to avoid these additional costs.

For those who are unable to afford the IID, exploring financial assistance options and payment plans can be a practical solution. Additionally, understanding the legal implications and potential penalties for non-compliance can help you stay on track and avoid further financial strain.

To learn more about the costs and financial considerations associated with a DUI conviction, you can read our comprehensive guide on the costs of a DUI in Florida. This resource provides detailed information on the various expenses you may encounter and offers tips on how to manage these costs effectively.

By understanding the costs and financial considerations for Ignition Interlock Devices, you can better prepare for the financial impact of a DUI conviction and take proactive steps to manage your expenses. Whether you’re dealing with a first-time offense or multiple DUIs, knowing the financial implications can make a significant difference in your case.


Failure to comply with Ignition Interlock Device (IID) requirements can result in severe penalties. These penalties can include extended IID installation periods, additional fines, or even jail time. It’s crucial to adhere to all IID regulations and ensure that the device is properly maintained and calibrated. Ignoring these requirements can lead to significant legal and financial consequences.

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What happens if you fail to comply with IID requirements? Failure to comply with IID requirements can result in extended IID installation periods, additional fines, or even jail time.

Compliance with IID regulations involves several key responsibilities:

  • Regular Calibration: The IID must be calibrated regularly to ensure accurate readings. This typically involves monthly visits to a service provider.
  • Data Reporting: The data collected by the IID is transmitted to an internet-based reporting system. This data is accessible by probation officers, who can use it to monitor compliance.
  • Retests: The IID will require periodic retests while driving to ensure continuous compliance. Failing a retest can trigger immediate consequences, such as a vehicle lockout.

What Happens if the Court Does Not Order an IID?

Even if the court does not mandate an IID, the Florida Department of Highway Safety and Motor Vehicles (DHSMV) has the authority to require its installation. This can occur if the court fails to order the IID for the mandatory period specified by law. Under Florida Statute Section 322.2715(4), the DHSMV can step in to ensure compliance with IID requirements.

Can the DHSMV require an IID even if the court does not? Yes, the DHSMV can order the installation of an IID if the court fails to mandate it for the required period.

This additional layer of oversight ensures that individuals convicted of DUI adhere to the necessary precautions to prevent further incidents. The DHSMV’s authority to mandate IID installation underscores the importance of compliance and the state’s commitment to reducing impaired driving.

For those who voluntarily install an IID, either as part of a DUI diversion program or to negotiate a better resolution to a DUI case, the requirements remain the same. Voluntary installation can demonstrate a proactive approach to addressing the issue and may positively influence the outcome of your case.

Understanding the legal implications and compliance requirements for IIDs is essential for anyone facing a DUI conviction in Florida. Non-compliance can lead to significant legal and financial repercussions, making it crucial to adhere to all IID regulations.

If you’re navigating the complexities of a DUI case, it’s important to understand the penalties for a third DUI within five years. These penalties can be severe and may include mandatory IID installation.

Additionally, it’s essential to be aware of the impact of a DUI on your professional life. For example, a DUI conviction can have serious consequences for professionals such as nurses and commercial airline pilots. Understanding these implications can help you take the necessary steps to protect your career and livelihood.

Consequences of Tampering with an IID

It’s important to note that tampering with an IID is a serious offense. Tampering can include any attempt to disable or circumvent the device, such as using a device to simulate a breath sample or having someone else blow into the IID. These actions can lead to severe penalties, including additional fines, extended IID installation periods, and potential jail time.

What are the consequences of tampering with an IID? Tampering with an IID can result in additional fines, extended IID installation periods, and potential jail time.

Ensuring compliance with IID regulations is not just about avoiding further legal trouble; it’s also about demonstrating a commitment to responsible behavior and public safety. By adhering to IID requirements, you can rebuild trust and work towards a more positive future.

For more information on the legal implications and compliance requirements for IIDs, you can refer to our comprehensive guide on the Ignition Interlock Device Guide. This resource provides detailed information on IID regulations and offers practical tips for maintaining compliance.

Understanding the legal implications and compliance requirements for Ignition Interlock Devices is crucial for anyone dealing with a DUI conviction in Florida. By staying informed and adhering to all IID regulations, you can navigate the complexities of your case and work towards a more positive outcome.


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What is the process for installing an Ignition Interlock Device in Florida?

The process for installing an Ignition Interlock Device in Florida involves several steps. First, you must select a state-approved IID provider. Next, schedule an appointment for installation. During the appointment, the provider will install the device and provide instructions on its use. Finally, you will need to regularly visit the provider for calibration and maintenance. For more details on the installation process, visit our Ignition Interlock Requirement page.

How do I maintain compliance with an Ignition Interlock Device?

To maintain compliance with an Ignition Interlock Device, you must follow several key steps. These include:

  • Regular Calibration: Visit your IID provider for monthly calibration to ensure accurate readings.
  • Data Reporting: Ensure that the data from your IID is transmitted to the internet-based reporting system accessible by your probation officer.
  • Retests: Perform periodic retests while driving as required by the device.

Non-compliance can result in severe penalties, including extended IID installation periods and additional fines. Learn more about compliance on our Ignition Interlock Tampering page.

Can I voluntarily install an Ignition Interlock Device?

Yes, you can voluntarily install an Ignition Interlock Device even if you are not mandated to do so by the court or the Florida Department of Highway Safety and Motor Vehicles (DHSMV). Voluntary installation can be beneficial if you are participating in a DUI diversion program or negotiating a better resolution to your DUI case. It demonstrates a proactive approach to addressing the issue and may positively influence the outcome of your case. For more information, visit our DUI Reduction page.

What are the costs associated with an Ignition Interlock Device in Florida?

The costs associated with an Ignition Interlock Device in Florida can be significant and typically include the following:

  • Deposit: $100 refundable deposit or a $5 monthly charge.
  • Installation Fee: Approximately $70 for installation.
  • Monthly Calibration and Monitoring: Around $67.50 per month.

If you are unable to afford these costs, the court may allocate a portion of your DUI fines to cover the expenses. Some IID providers also offer payment plans. For more details, visit our DUI Mitigation page.


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Third DUI Penalties Guide Fourth DUI Penalties Guide
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Legally Reviewed by Joe Easton

Experienced Florida DUI Attorney

This article on ignition interlock devices in Florida has been legally reviewed by Joe Easton and the content team. With over 60 years of combined criminal defense expertise, Joe Easton brings a wealth of experience and strategic insight into DUI and criminal defense cases. His commitment to personalized client care and tenacious courtroom representation ensures that your legal challenges are met with dedication and expertise.

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