Guardian Ignition Interlock is CA’s most affordable ignition interlock device. Guardian’s device is discreet and one of the easiest to use devices on the market. With over 30 years of experience, Guardian is one of the most trusted iid brands. Our location at 20160 Paso Del Prado is CA certified with expert technicians for all your interlock installation and calibration... Read More about Guardian Interlock

LifeSafer Ignition interlock is the leading ignition interlock provider nationwide and home to “No-Call Install”, the first fully online installation booking tool. LifeSafer’s locations are CA certified and our expert technicians at 20160 Paseo Del Prado can handle all your installation and calibration needs. LifeSafer has over 30 years of ignition interlock experience and has helped over 1.5 million people... Read More about LifeSafer Ignition Interlock

Low Cost Interlock offers the easiest, cheapest, fastest, most reliable ignition interlock device (IID) for your car. Our ignition interlock system allows you to effortlessly achieve your ignition interlock restriction and get you back on the road. Visit Custom Audio Designs at 750 N Nogales St for the most convenient interlock installation in the Walnut, CA area.