A DUI conviction in South Carolina does not just come with fines and possible jail time. It also triggers strict driving restrictions. One of the most significant requirements is the installation of an Ignition Interlock Device (IID) on any vehicle you drive. Here’s what you need to know.

What Is an Ignition Interlock Device?

An IID is a small breath-testing machine installed in your vehicle. Before the engine starts, you must blow into the device. If alcohol is detected, the car will not start. South Carolina law requires this device for anyone convicted of DUI under Sections 56-5-2930, 2933, 2945, or 2947, or for those issued a temporary alcohol license (SC Code § 56-5-2941).

Who Approves and Installs the Device?

The Department of Probation, Parole and Pardon Services (PPP) certifies which devices meet accuracy and safety standards. Once approved, a manufacturer installs the IID for you. Common providers include:

A-1 Smart Start: 1-800-880-3394
Intoxalock: 1-833-234-6036
LifeSafer: 1-888-861-1172
Alcohol Detection Systems: 1-888-205-1832

All costs for installation and maintenance are the responsibility of the driver (SC Code § 56-5-2941(F)).

Maintenance and Check-Ins

Every 60 days, your IID must be inspected by an authorized service provider. At each check-in:

Any misuse, such as trying to bypass the device, or failures to blow into the system will be recorded.
Violations result in IID points being added to your record.

If you accumulate four or more points, your license will be suspended (SC Code § 56-5-2941(H-I)).

Penalties for Driving Without an IID

It is illegal to operate a vehicle not equipped with an IID during your restriction period. Doing so can lead to additional penalties, including potential jail time (SC Code § 56-5-2941(K)).

License Restoration

Once your suspension period or ignition interlock requirement ends, your license will be restored even if you have not yet completed the Alcohol and Drug Safety Action Program (ADSAP) (SC Code § 56-5-2951(J)).

Final Thoughts

An IID requirement may feel overwhelming, but compliance is crucial. Following the rules keeps you legally on the road and helps you avoid harsher penalties.

For more details, review the official brochure from the Department of Probation, Parole and Pardon Services.

If you have been charged with DUI in Charleston, SC, you don’t have to face the legal system alone. Henderson & Henderson is dedicated to protecting your driving privileges, minimizing penalties, and guiding you through every step of your case.

Call (843) 396-2293 today to schedule your confidential consultation.