If you’re facing a drink driving charge in NSW, you may be wondering: “Do I have to get an interlock device installed in my car?”

NSW’s Mandatory Alcohol Interlock Program applies to many mid and high-range drink driving offences, and even some low-range ones.

Understanding how it works is critical because the consequences can affect your freedom, your finances, and your ability to drive for years.

 

What Is an Interlock Device and How Does It Work?

An interlock device is an electronic breathalyser connected to your vehicle’s ignition. The system prevents the engine from starting unless you provide a zero-alcohol breath sample.

Additionally:

• Random rolling tests may occur while driving.
• Any positive reading is electronically logged.
• Violations are sent to the interlock monitoring authority.

These logs can be used in court or in future sentencing if breaches occur.

 

When Is an Interlock Order Mandatory?

The NSW court must impose an interlock order for:

• Mid-range PCA offences
• High-range PCA offences
• Repeat drink driving offences
• Refusing or failing a breath analysis

Drivers must first serve a disqualification period, followed by a mandatory interlock participation period that typically ranges from 12 to 24 months.

 

Costs Involved

Interlock devices include several expenses:

• Installation fees
• Monthly leasing costs
• Monitoring appointments
• Removal fees

For many clients, these costs come as a surprise. However, some drivers may be eligible for rebates or concessions.

 

Can You Apply for an Exemption?

You may avoid the interlock program only if you successfully obtain an Interlock Exemption Order, which is granted in rare circumstances such as:

• Medical conditions preventing use
• No access to a vehicle
• Severe financial hardship in combination with other factors

Persuasive evidence, medical certificates, and strong legal submissions must support these applications.

 

Why Legal Guidance Matters

A lawyer can:

• Help you avoid an interlock order where applicable
• Prepare an exemption application
• Reduce your disqualification period
• Minimise monitoring conditions

Understanding the interlock requirements early makes the difference between a smooth process and long-term complications.

If you’ve been issued an interlock order, our experienced traffic lawyers are here to help. We’ll walk you through how interlock devices work, your legal obligations, and the best way to navigate the process. Contact us now.