Car keys and glass of beer

Dealing with a DUI conviction in South Carolina can have significant consequences, including fines, jailtime, license suspension, and the installation of an ignition interlock device (IID) on your vehicle. If you’re convicted of DUI, the state can require you to install IIDs on any vehicle you drive regularly, but there’s more to the device and the program than meets the eye. Here’s what your South Carolina DUI defense attorney wants you to know. 

What Is an Ignition Interlock Device?

An ignition interlock device is essentially a breathalyzer installed in your vehicle that’s connected to the ignition system. Before you can start your car, you’ll need to blow into the device. If the device detects a blood alcohol content (BAC) above a pre-set limit (typically 0.02%), the vehicle won’t start.

If you’re driving for more than a few minutes, the IID will also prompt you to provide random breath samples at various intervals. These random checks are designed to make sure you’re staying sober throughout your trip. If a rolling retest is not provided, or if you blow above the limit, the device will typically issue a warning. If you fail to comply or blow a high reading, it can trigger alarms (like flashing lights or honking the horn) until the vehicle is turned off. 

Why Does the State Use These Devices?

South Carolina uses ignition interlock devices as a way to reduce the number of DUI offenses that happen each year and to cut down on the number of accidents and injuries drunk drivers cause in the state. By requiring the use of IIDs, the state hopes to encourage drivers to be responsible, deter repeat offenses, and make the roads safer for everyone. But more importantly, it allows you to continue driving after a DUI conviction so you can get to work, go to doctors’ appointments, and live your life.

How Long Does the Device Have to Stay on Your Car?

The length of time you’re expected to leave the IID on your car depends on the number of convictions on your record and the circumstances surrounding your case. Here’s a quick breakdown:

  • 6 months for the first offense
  • 2 years for the second offense
  • Three years for a third offense
  • Life for the fourth or subsequent offenses

Your South Carolina DUI defense attorney will be able to explain the amount of time you’ll need to leave the device in place based on your case.

You’re Responsible for the Cost of Installation and Maintenance

Unfortunately, the state won’t cover the cost of the installation or maintenance of your IID. That burden is on you until the state allows you to remove the device from your vehicle. This means you’ll be on the hook for:

  • The installation fee
  • Monthly maintenance fees
  • Monthly leasing fees if applicable
  • The cost of removal once the term is over

These costs can vary depending on the IID service provider and the specific features of the device. Failure to pay these fees or maintain the device properly can lead to violations and potential extensions of the IID requirement. And if the violations continue, you risk losing your ability to drive legally.

Man, check and traffic officer with license for checkpoint

Without the Device, You Can’t Drive

If you’re caught driving a vehicle without an IID installed, you can face strict penalties. For first offenses, it’s normal to see fines, but you may also be required to leave the IID on your vehicle longer than you were originally required to. The cost of the fines and the length of the duration of your IID installation will increase with subsequent violations. 

Speak With a South Carolina DUI Defense Attorney Today

If you have been arrested for a DUI, speak with an experienced South Carolina DUI defense attorney as soon as possible. They’ll explain your rights and may be able to mount a defense for your case. Remember, IIDs are only required if you’re convicted. Contact us today to schedule a free consultation.