Guardian Interlock is an independent, family-owned company provider of alcohol ignition interlock systems designed to prevent the operation of vehicles by impaired drivers.

Guardian Interlock manages offender interlock programs on behalf of state transport authorities who may require drink driving offenders to have alcohol interlocks fitted as part of their rehabilitation. We also manage private and commercial company alcohol interlock systems.


Our interlock services prevent drink driving, protects the public and allows the relevant authorities to monitor attempted breaches and intervene where necessary. Our alcohol interlock products are certified to Australian Standard AS3547, Cenelec 50436-1, Cenelec 50436-2 for quality assurance, and Guardian has achieved ISO 9000 certification.


Accreditations are third-party verifications certifying that an organisation complies with regulating industry standards. At Guardian, our accreditations listed below are ingrained in how our company performs daily business, formally demonstrating our commitment to safety and quality.

Leading Interlock Products

Guardian offers premium quality, accurate and effective interlock systems for vehicles across Australia. To learn more about the products that we offer and install at our Service Centres, please follow the link below.

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