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Ignition Interlock Device

Ignition Interlock is a device installed in a motor vehicle that prevents the ignition from starting unless the driver blows a breath sample into the device. If the alcohol concentration of the breath sample exceeds 0.05, the motor vehicle engine will not start.

For all Ignition Interlock Devices installed on or after July 1, 2013 the new mandated fail point for the ignition interlock device has been lowered from 0.05 to 0.025. However, the court may choose a lower threshold for the device.

Section 316.193, Florida Statues, requires ignition interlock device to be installed on the vehicles of certain persons convicted of DUI.

The ignition interlock program affects those arrested and convicted of DUI after July 1, 2002, upon eligibility of reinstatement for a permanent or restricted driver license. The ignition interlock device is also required when a driver convicted of DUI applies for a restricted license for work or business purposes (s. 322.271, F.S).


DUI Conviction Ignition Interlock Requirements
First Conviction If Court Ordered
First Conviction if 0.15 or minor in car At Least 6 Months
Second Conviction At Least 1 year
Second Conviction if 0.15 or minor in car At Least 2 years
Third Conviction At Least 2 years
Fourth or Subsequent Conviction  At Least 5 years

Attention Customers:

Things you may not know about the Ignition Interlock Device (IID) that is installed in your vehicle.


  1. The time you are required to have the IID installed does not start until you go to the Driver License Office and reinstate your license.
  2. Your IID installation time must be continuous.
  3. You do not receive credit for having the IID installed if your license is suspended, revoked or cancelled.
  4. Your license can be revoked if you are convicted of driving a vehicle that does not have the IID installed.
  5. Your license will be cancelled if you do not comply with the IID requirements.
  6. You are responsible for all the readings on the IID.
  7. You have additional requirements if you get any IID Violations...
    1. 1st Violation – must report to the DUI program for a monitoring appointment ($25)
    2. 2nd Violation:
      • Must report to the DUI program for a monitoring appointment.
      • Develop a Case Management Plan ($55).
      • Report monthly to the program for the duration of your IID time ($45 *includes IID monthly compliance fee).
    3. 3rd or Subsequent IID Violation:
      • Must report to the DUI program for referral to substance abuse treatment ($55-$60) .
      • Report to the DUI program for monthly monitoring appointments ($45 *includes IID monthly compliance fee)
      • You must complete substance abuse treatment and your IID time may be extended.



    DUI Counterattack Hillsborough, Inc provides supervision for the Ignition Interlock Device. Installation is completed by one of the vendors below.

    Vendor Website Phone Number
    Alcolock/Interlock Systems of Florida (Alcohol Countermeasure Systems Corp.) www.alcolockusa.com/Florida 1-866-837-8646
    Draeger www.draegerinterlock.com 1-800-332-6858
    Guardian Interlock www.guardianinterlock.com 1-800-499-0994
    Intoxalock www.intoxalock.com/florida 1-877-777-5020
    LifeSafer www.lifesafer.com 1-800-634-3077
    Low Cost Interlock www.lowcostinterlock.com 1-844-276-0554
    Smart Start www.smartstartinc.com 1-800-880-3394

    All fees are determined by the Interlock Systems of Florida and are subject to change at their discretion. If additional information is needed regarding fees, please contact the vendor.


    Costs to the Defendant:
    Ignition Interlock Device Fees
    $25.00 IID first violation appointment
    $25.00 IID first violation missed appointment
    $55.00/$60.00 IID Case Management appointment 2nd/3rd violation
    $55.00 IID missed Case Management appointment 2nd/3rd violation
    $45.00 IID 2nd violation monthly appointment (includes IID monthly compliance fee)
    $45.00 IID 3rd violation monthly appointment (includes IID monthly compliance fee)
    $25.00 IID missed monthly appointment 2nd/3rd violation.
    $20.00 IID monthly compliance fee

    For more information Contact the

    Department of Highway Safety and Motor Vehicles: www.flhsmv.gov.