If you have a DWI conviction in New Jersey, state law may require an ignition interlock device as a condition of license restoration. Whether the requirement applies depends on your blood alcohol level at the time of the offense and your prior record.
How the ignition interlock device works
An ignition interlock device is a breath-testing unit wired into your vehicle. Before the engine starts, you must give a breath sample that falls below the device’s set alcohol limit.
Only state-approved vendors can install these systems, and New Jersey’s breath alcohol device requirements outline that approval process.
Approved devices require more than one clean test
The first breath sample may not be the only one required during a trip. Approved interlock devices require rolling retests while you are driving to confirm that you have not consumed alcohol after the vehicle starts.
Problems that can lead to violations include:
- Missing a rolling retest
- Failing a breath test
- Missing a scheduled service appointment
- Tampering with the device
These issues can lead to device lockouts, additional penalties or an extended interlock period.
Compliance determines when the device can be removed
You will generally need regular service visits so the vendor can calibrate the device and report compliance data. If you miss those appointments or ignore a malfunction, the problem can delay removal of the device or lead to added court penalties.
License restoration issues like these often overlap with broader DWI defense concerns, especially when the court order ties driving privileges to strict device compliance. If you are working through license restoration after a DWI conviction, a New Jersey DWI attorney can review the order and explain what could extend the interlock period.