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Alcohol Ignition Interlock Devices

Alcohol Ignition Interlock Devices are installed in vehicles to prevent their engines from being started until an alcohol-free breath sample is provided.


Our interlocks are certified to Australian / New Zealand standards.


The Smart Start 20/20 has been designed with user experience at the forefront.

Safety, reliability and ease of use have made this our most commonly used interlock device in New Zealand. Everything from the large keypad, ergonomic grip design, and remote unlocking options have been engineered to fit seamlessly into your everyday driving routine.


  • Simple straightforward breath testing
  • Remote unlocking options
  • Ergonomic with its comfort grip design
  • Backlit screen for easy reading
  • Large keypad allows you to navigate the functions of the device with ease, such as accessing status updates and remote unlocking
  • Used fuel cell technology, the same technology as police breathalysers


Download our user manual which contains the answers to many common questions.




When you call we’ll set you up on the programme, find out if you’re eligible for the interlock subsidy and answer any other questions that you might have.

We make it very quick and easy to get an interlock installed! 



Once you’ve got your interlock licence, email a copy of it to or send it via Facebook.



We’ll email you an electronic lease agreement  which can be signed at the click of a button. 

We then book your install.



On the day of install, drop your vehicle to the Service Centre at the booked time. Allow half a day for the installation, the Service Centre will often call you when your vehicle is ready.


The Service Centre will train you how to use your interlock when you pick it up.



You can arrange the removal of your interlock when you’ve completed the interlock programme and you’ve obtained your zero alcohol licence.


If you have committed a drink driving offence, you may lose your licence and be disqualified from driving for a specified period of time. After this disqualification period, you will be required by NZTA to get an alcohol interlock licence, and have an alcohol interlock installed in your vehicle.

As part of your alcohol interlock program, the interlock condition on your licence means you cannot legally drive any vehicle without an ignition interlock device fitted. If you own multiple vehicles and wish to drive them, you must have an alcohol interlock fitted to each vehicle.

To complete the program, you must demonstrate the ability to separate drinking and driving over a specified period. However, significant or repeated violations, such as attempting to drink and drive, missed or failed retests or tampering with the alcohol interlock, may lead to extended time on the program and additional penalties.

No certainly not. Smart Start also provides interlocks for private employers and individuals. Please refer to our Voluntary Interlocks page for more information.

You must have an interlock licence issued, and an interlock installed for a minimum of 12 months before you can exit the programme.

In most cases, the alcohol interlock program is a mandatory requirement for individuals to regain a full licence after a period of disqualification from driving. If you choose not to participate, you may face an extended period of disqualification or other penalties.

The best plan is to have the interlock removed until you are able to afford it. Removal and reinstall charges will apply but the lease costs continue and can end up costing you more than the removal/install. 

Please contact Smart Start for advice if you are having trouble. We can help avoid unwanted additional fees and ensure you don’t do anything that will extend your programme.

If the interlock detects alcohol in your breath sample, it will register a ‘fail’, and the ignition will be locked (a ‘lockout’). You will be able to do another breath test after a short period of time, but please note that it could extend your program participation period.

Always take a retest when requested, even if you are about to turn the vehicle off. Missed retests are considered a violation, and may require you to return to the service centre for an unscheduled service.

If your interlock enters SVCLCK or VIOLOCK you will need a code to be able to start the vehicle. In this case, you will need to pay for a code to enable you to return your vehicle to the service centre. You will need the call code from the head unit to complete your purchase. This can be obtained by pressing #5 on your head unit while the ignition is on. “UNLOCK xxhr” will display and countdown once the code is entered. Ensure you return to the service centre before the countdown ends or else you will not be able to drive your vehicle.

There could be a number of reasons for this – certain foods or mouthwash containing alcohol for example, we recommend that if you have had anything to eat, drink, smoke or chew, you should wait a few minutes and rinse your mouth with water first. If you think this may be the reason for your test failure, wait a few minutes and try again. 

The interlock will stop you starting your car if you have been drinking or if it is in lockout, but it will never stop your car while the engine is running.

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Safety, reliability and ease of use have made this our most commonly used interlock device in New Zealand. Everything from the large keypad, ergonomic grip design, and remote unlocking options have been engineered to fit seamlessly into your everyday driving routine.