Guardian Interlock

Low Cost Interlock offers ignition interlock devices (IIDs) for your car. Our IIDs are reliable and easy to use, and we offer installation services at our location in McKinney, Texas. We are committed to helping our customers achieve their ignition interlock restrictions and get back on the road.

Smart Start is the #1 Ignition Interlock Device provider in McKinney with same-day installation available for your vehicle. We’re a convenient and affordable Texas IID supplier located in East McKinney at 3733 E. University Dr. with mobile services and price matching available to give you the best value. Our reliable customer service experts and licensed technicians will make your IID device experience quick & low stress. Smart Start is ready to schedule your Ignition Interlock Device installation in McKinney. Call our East McKinney location & talk to a Program Advisor, who will help you schedule an appointment for your IID installation, calibration or removal.

Intoxalock is the no. 1 ignition interlock device brand in the U.S., and Intoxalock Ignition Interlock in McKinney, TX is here to help you get back on the road after a DUI. Intoxalock has more locations than any other provider, and we can find an interlock installation location near you. We will help you understand TX interlock, or IID, laws and regulations. Our interlock installation locations are staffed with certified professionals who will install and service your car breathalyzers. For 30 years, Intoxalock has been a trusted interlock ignition device provider. Call now to talk to a TX expert.