Guardian Interlock provides ignition interlock systems (also known as "blow and go" or "car breathalzyer" for people who need or want them after a DUI/DWI arrest. We provide high quality services and devices to make the process of installing and using an interlock as easy as possible.
Guardian Interlock (guardianinterlock.com) has 813 customer reviews on Five Star Index, with an average rating of 4.0 out of 5.
Also known as
guardianinterlock.com
Website
guardianinterlock.com
Category
Auto Parts & Wheels
Listed on Five Star Index
2026
About these reviews
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The company replied to 49% of reviews.
Latest
Most recent review: October 2026.
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Thank you for taking the time to bring this to our attention. You are important to us and we sincerely want to ensure you get the best service possible. Someone from our Executive Resolutions Team will be reaching out to you shortly to see how we can best assist you during this time.
GZ
greg Z.
Totally unorganized
Totally unorganized, zero communication
Response from Guardian InterlockApr 24, 2019
We appreciate you taking the time to provide us with honest feedback. We are always striving to become better for our customers, and your feedback helps us to best understand how. Someone from our management team is looking into this and will be in contact with you soon to see how we can help.
PB
Paige B.
The first day I got the device in my…
The first day I got the device in my car it locked me out of the car that was parked in a store parking lot. I called customer service and they tried to make me pay 50$ for a code for something I didn’t even do. I was also on hold for an hour waiting for this code and no one came back. I then hung up and called back and was placed on hold once agian for a long period of time at this point I was done and had to get a ride home and leave my car over night night. This isn’t the
First time I’ve had such a negative experience. I’ve had nothing but troubles with customer service and with my device .
Response from Guardian InterlockApr 24, 2019
I'm very sorry to hear of your experiences with our Customer Service team as well as hardships with your interlock device. Someone from our management team is looking into this and will be in contact with you soon to see how we can help you through this difficult time.
SC
Sam C.
USE ANY OTHER INTERLOCK COMPANY
I am currently on hold with customer service and have been for 75 minutes and counting.
I have had my intrerlock device for 9 months. The first few months it took me some time to get used to, but no major issues. As soon as the weather started to get cold (I live in Pennsylvania, and it can get quite chilly here), I started having major device malfunctions. I am currently on my 3rd device in 6 weeks because of device malfunctions. Here's the best part - they're never even the same issues! I've had a device with issues that strange codes pop up and then a substantial number of days are magically gone, a device where there are strange noises coming from the steering column and then days are magically subtracted, a device where I would get a "FAIL" message before I had even blown into it, and this device that I'm currently on hold regarding just gives random messages every time I blow into it and also transmitted the message that I was disconnecting my handset. This one really upset me because I don't even know how the handset disconnects and I resolved myself to just biting the bullet and getting through my interlock period as painlessly as possible.
Just a few hours ago, I left my house, blew into the device to start my car, got a "PASS" message no problem. I go to the ATM down the road from my home, leave the ATM, the device asks for a rolling reset blow. I blow into the device well within the timeframe allowed, and almost immediately get a "FAIL" message. I roll my eyes because I am just so tired of the device issues. I pull over to the side of a busy expressway, turn the device off, and get a "WARN" message. Note: nothing had been near my mouth or the device since this journey started less than ten minutes ago and prior to leaving my house there was no food, beverages, toothpaste, mouthwash, or anything else that could have caused any issues. Three minutes after I had started the device again, it asks for another rolling reset blow. I once again blow into the device, and instantly get a "PASS" message. Note: these events all happened within the course of 15 minutes or less. So the readings that this device transmitted was that in a 15 minute period, I was sober, drunk, then blew trace amounts of alcohol, then was sober again. The experience and the way that this company does business is deplorable and I'm not sure how they're still permitted as a vendor. The only good thing about this experience is that the boys at the service center that I use are excellent and understanding.
If you ever need to contact customer service - brace yourself. You will be on hold for several hours, and they are rarely able to provide any assistance whatsoever.
Even though I am 75% through my interlock period, I have begun looking at other vendors because I am not going to let this company's faulty devices add time to the period that PENNDOT has designated, which is exactly what will happen if Guardian Interlock devices continue to constantly use faulty equipment which transmits incorrect information to the DMV. I have been asked a few times who my vendor is, and I have told every single one of these people that I don't know anything about other vendors, but they have to be better than these people.
Response from Guardian InterlockJan 28, 2019
We are sorry to hear that you are experiencing hardships with your interlock device. We want to be able to see how we can best assist you and get you back on the road with ease. Someone from our management team is looking into this and will be in contact with you shortly to see how we can help you through this difficult time.
KA
Kaylin
Ive had my device for a couple months…
Ive had my device for a couple months and when I originally got it installed.. the sample required me to blow, blow/hum, and inhale... well they recently changed it and know its just a blow hum and i'm having so many problems with it. Every time I give a sample it says my blow and hum is too loud and I keep trying to fix my blow and hum to what its asking of me and it still doesn't work. I just got off of work and I had a rolling retest and I kept blowing into it and it wouldn't take my samples because it kept saying the same thing and I kept trying to change my blow/hum to what it was saying, but then time ran out and it came back as a refusal. Im aggravated and i'm not sure what i'm supposed to do. I don't drink alcohol anymore and I don't want to be in trouble for this.
The blow, blow/hum, and inhale was so much easier and i'm angry that I now have a refusal on my record after I repeatedly was doing what I was told to give it a good sample and it wouldn't work.
JO
Joshua O.
DO NOT USE INTERLOCK. Fault device caused violation!!!
DO NOT USE INTERLOCK. The machine malfunctioned, and was stuck on a " blow" on the display afters retest.
Worried about it, I called interlock, in which no one answered. When I got home, I cut the car off and the words still displayed.
It took me over a hour, and multiply holds, to finally to talk to someone from interlock. Interlock told me that I am locked out due to a violation, even though I explained I did everything correctly.
She noted that there must have been a count down, displayed. The thing with the device is, there is always a count down after you initial retest.
Response from Guardian InterlockDec 7, 2018
Thank you for taking the time to bring this to our attention; we are looking into this matter and someone will contact you shortly to see how we can make this experience a better one.
MW
Maree W.
I was lied to today by Guardian Sydney…
I was lied to today by Guardian Sydney staff member. This has made me quite annoyed and is very unprofessional on her part. It also doesn't align with the company's value of 'integrity'.
Response from Guardian InterlockNov 26, 2018
We’re sorry to hear of your experience, and would like the opportunity to investigate this further to see how we can help. Unfortunately, we are unable to identify your account, so we’ve sent you a private message requesting more information. Upon your response, our management team will reach out to see how we can best assist you.
RS
Richard S.
I have had trouble with my Interlock…
I have had trouble with my Interlock since day one. I received a lockout code on Thursday it was accepted but when I went to start it it was locked again. I have been calling since with no luck. A few times I did get a hold of some one the put me on hold and never answer the phone again. A couple times that I was on hold it was for a hour then they ask for you to leave a message. When someone finally gets a hold of me it's after 5pm and my shop closes at 4 and it's an hour away. Worse customer service I have ever dealt with.
Response from Guardian InterlockNov 20, 2018
Thank you for taking the time to bring this to our attention; we are looking into this matter and someone will contact you shortly to see how we can make this experience a better one.