New Jersey's #1
Interlock Provider

Get started with the real ignition interlock experts

Best Price Guarantee
Low Price
24/7 Support
Best Device
Most Locations

We make it simple...

Get back on the road in 3 easy steps. We've been an industry leader since 2004, We know a thing or two about the interlock device process.

  • Setup your appointment
  • Bring in your car
  • Get your license back

IDNJ is a family owned and operated business specializing in New Jersey Interlock Services. Sales, all the way through installation and customer service, our team is well-versed with the intricacies of New Jersey Interlock requirements. Other companies are large, nationwide corporations that are “one-size fits all”.

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Our state of the art device - The Draeger XT Interlock

The Draeger XT meets worldwide device requirements, offers the greatest possible convenience for the user, and sets a new standard for alcohol interlocks.

  • 01 Fastest usability

    To avoid long waiting periods, Dräger put emphasis on the Interlock XT being ready to use. Its functionality is as good at -40 °F or +185 °F as it is in normal conditions.

  • The Dräger Interlock XT determines the breath alcohol concentration via an electro-chemical sensor system. This device is responsive to alcohol only.

  • The device immediately detects any attempt to use auxiliaries, such as air pumps or filters to bypass the Dräger Interlock XT. It will prevent the motor from starting in such cases.


Get Started

Free Installation

Any year, make or model.

Free Removal

No surprises here.

Same Day Install

Getting you back on the road is our priority. Call today for your same day installation.

Fast & Convenient

We know your time is valuable. We schedule your install on YOUR time and get you in and out, ASAP!

Easy Calibrations

The State of New Jersey mandates calibrations every 30 days for your Interlock Device. Our process is fast and easy.

30+ Locations

We have multiple full-service locations throughout New Jersey. Call us to find our closest location to you.

Low Prices

Our rates are fair and competitive. One affordable daily rate, no other fees, ever.

Free installation, calibration and removal

Once installed, we will give you all the paperwork necessary to get your license restored. You will get an interlock restricted license and can enjoy driving again. Appointments available same day!

Google Reviews

Our reviews speak for themselves.

Jayme B.

Matt was a DREAM come true! He is super helpful, incredibly punctual and always works efficiently with a smile on his face! Please tell his boss that he deserves a promotion and a raise! He is an example of the employee that every business needs - smart, quick, knowledgeable, helpful, friendly, professional, honest and dependable.

Rich V.

I just finished up a year with my interlock device. These guys made the process completely painless. Great, friendly service. They're always there to answer questions and help out as much as possible. Can't recommend them enough. 10/10.

Zanda R.

An extremely professional outfit that is very well run. If you pay attention to their instructions from the start life is easy. I really appreciate all these guys did, made a bad experience more manageable. Thank you.

New Jersey Locations

We have more 5 star ratings than any other Interlock company. Give us a call and find out why.

Berlin TWP, NJ

Berlin TWP

424 Commerce Ln #3
Berlin TWP, NJ 08091

Cherry Hill, NJ

Cherry Hill

1916 Old Cuthbert Rd
Cherry Hill, NJ 08034

Eatontown, NJ


52 NJ-35
Eatontown, NJ 07724

Hamilton, NJ


200 Whitehead Rd #109
Hamilton, NJ 08619

Hammonton, NJ


818 Wiltsey's Mill Rd
Hammonton, NJ 08037

Kenilworth, NJ


120 Market St
Kenilworth, NJ 07033

North Bergen, NJ

North Bergen

2500 83rd St #19W
North Bergen, NJ 07047

North Brunswick, NJ

North Brunswick

832 Ridgewood Ave
North Brunswick, NJ 08902

Pleasantville, NJ


202 Cambria Ave #C
Pleasantville, NJ 08232

Saddle Brook, NJ

Saddle Brook

280 N. Midland Ave
Saddle Brook, NJ 07663

Toms River, NJ

Toms River

1765 US-9 Bldg 3, Ste A
Toms River, NJ 08755

Vineland, NJ


3 1200 West Blvd
Vineland, NJ 08360


Our Competitors

  • Installation Cost: $100-$500 depending on vehicle
  • Calibration Cost: $25-$45
  • Removal Cost: $100 and up
  • Missed appointment fee: $25-$35
  • Lockout fee: $25-$35


You've got questions, we've got answers.

  • Will an interlock device ever shut off my engine?

    No. Our Interlock does not shut off a vehicle's engine, or stop it abruptly in its tracks. If a retest is failed, or if the retest is not presented when required, a violation will be recorded. The vehicle's horn may sound and the lights may flash until either the breath test is passed or the vehicle is turned off by the driver.

  • Yes, however there is no way of verifying that you were not the person driving the vehicle. This means that you become responsible for everything that the unit records. If another person was driving the car you are still responsible for any consequences that arise if that person was drinking.

  • Yes, we can install an interlock on your motorcycle. Please contact us anytime to setup your appointment.

  • Failed tests are recorded as violations. No, we do not charge for failed tests. Our competitors charge anywhere from $35.00 - $135 for failed tests.

  • Our competitors require you to wrap up your device in extreme temperatures. Our Interlock XT is discreet, easy to use and temperature resistant.