Virginia Ignition Interlock — Requirements & Costs

An ignition interlock device (IID) is a breathalyzer wired into your vehicle's ignition system. It prevents the engine from starting if it detects alcohol on your breath above a preset threshold §18.2-270.1. In Virginia, IID requirements are a central part of DUI/DWI consequences.

mandatory as a condition of a restricted license for convictions under clauses (i), (ii), or (iv) of §18.2-266 (alcohol or combined alcohol-drug) and under §18.2-266.1; for a first offense under clauses (iii) or (v) of §18.2-266 (drug-based), the court may — but need not — impose it.

12 consecutive months (first offense; a six-month minimum is available only upon the offender's motion if additional restrictions are ordered); 12 consecutive months (second or subsequent offense and after license restoration); court may impose longer periods.

Common violations that can extend the IID period or trigger additional consequences:

• Failed startup tests (BAC above threshold)
• Failed rolling retests
• Missed calibration appointments
• Tampering with or attempting to circumvent the device
• Operating a vehicle without an IID when one is required

IID costs are borne by the offender and include:

• Installation fee
• Monthly monitoring/rental fee
• Removal fee
• Calibration fees (may be included in monthly rental or charged separately)

While the IID is a restriction, it is also the mechanism that allows many offenders to resume driving sooner than they would under a full suspension. In Virginia, restricted driving privileges during the suspension period are limited. Complying fully with IID requirements — no violations, on-time calibration — is the fastest path to full reinstatement.