Most reliable ignition interlock devices in over 40 years. With ALCOLOCK, you don’t have to choose between quality and affordability; they both come standard.
ALCOLOCK (alcolockusa.com) has 43 customer reviews on Five Star Index, with an average rating of 1.5 out of 5.
Also known as
alcolockusa.com
Website
alcolockusa.com
Category
Auto Parts & Wheels
Location
Daly City, California
Listed on Five Star Index
2026
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Latest
Most recent review: June 2026.
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Scam artists! They lure you in with low prices and quick appointments available, but wait until it gets installed!
We share a car with a person who has it installed. I drive it every weekend, and every single time I drove it, it refused to accept my breath sample - "blow harder, blow longer, you are blowing too hard, you are blowing too fast." It's ridiculous! In the end, I missed 2 tests within 30 minutes, and it recorded 2 violations. The DMV sent a letter stating that they are adding 2 months to the requirement for both violations, unless we contest it with vendor records. Called Alcolock to request vendor records, because those were missed tests. They were extremely rude and refused to release records unless we paid $60 for EACH! Scammers, it's your device that doesn't work!
If you are deciding on a company, DO NOT USE Alcolock, you will never be out of it, because their devices are garbage, more and more time will be added on, and you will be paying hundreds for device reset and your records.
UPDATE:
Now 1.5 months into using the device and it's not acceppting breath samples more and more often, once out of every 3 times used, by the owner as well. I believe it's about to break completely and we'll be contacting Alcolock to see if we can terminate the contract and how much it will cost, so we can switch to a more reliable device.
CF
Charlie F.
Deryk was so helpful
Deryk was so helpful! He went above and beyond my expectations from any customer service rep. He price shopped and got me a great price, and got me an appointment for the next business day. He's called back several times to remind me about my appointment and walked me through the payment processes. Super fun and friendly to talk to. He's someone I would actually hang out with. I wish all customer service experiences were like that. Thank you brother for all your help.
DI
Diesel
These devices are absolute garbage.
These devices are absolute garbage.
When I first got mine installed I had to change the handset constantly.
Finally I ended up with one which worked flawlessly…. For months, but then it suddenly started malfunctioning.
After I went to change out that handset, even while at the dealership and before leaving the parking lot, the second handset was deemed faulty. I couldn’t get a passed test even to leave the parking lot. The mechanic tried, and it was the same thing.
So I received another handset. Thats #3 in one day.
This one seemed to work fine. So off I went … when suddenly the retest came and it would not allow me to provide a sample. It kept powering off, ignoring my blowing, etc…
This went on for 2 days, so I went back for a fourth decide.
This morning I went out to get a coffee and got stuck in the parking lot at McDonald for 2 1/2 hours.
Finally had to tow my car to the garage where they service these pieces of garbage and they’re closed for the weekend.
So now, because of 4 faulty devices in less than a week, I’m stranded at home without a vehicle….
They are absolute rubbish!!!
GE
Geremia
They are the weirder company in…
They are the weirder company in currently with them fly dui for smoking pot don't drink alcohol and it keeps saying it detected alcohol. Every other week I'm paying for this faulty device and the customer service experience of horrible .. Oh I could find negative star I would
PT
Paige T.
Safety and Product Liability…
Formal Safety and Product Liability Complaint Investigation
Re: Alcolock Ignition Interlock Device (AlCOLOCK, CANADA, ONTARIO)
Safety concerns and repeated failures associated with the ALCOLOCK ignition interlock device (COMPANY: ALCOLOCK, CANADA, ONTARIO) The device presents an unreasonable risk to drivers and the public and fails to operate as advertised or required for safe use.
The ALCOLOCK device requires drivers to provide breath samples while operating a moving vehicle. This design forces the driver to divert visual, cognitive, and physical attention away from the road in order to comply. The device also mandates “rolling retests” while driving, which significantly increase distraction and materially raise the risk of motor vehicle collisions.
Distracted driving is a leading cause of serious injury and death on Ontario roads and is a punishable offence under provincial law. Despite this, the interlock device requires handheld operation, visual monitoring, and controlled breathing while the vehicle is in motion. Functionally, this is equivalent to operating a handheld electronic device while driving, which is otherwise prohibited due to safety risks.
I have experienced a device malfunction on numerous occasions but in particular while driving on a busy highway during severe winter conditions with reduced visibility. The device prompted a rolling retest and repeatedly failed to accept valid breath samples, displaying the error code “INVALID SAMPLE 05.” Despite multiple attempts to comply while maintaining lane position and monitoring traffic, the device continued to malfunction.
The device then activated loud alarms inside and outside the vehicle, creating a severe distraction for both myself and surrounding drivers. I was forced to pull over immediately on the highway shoulder in hazardous conditions while vehicles passed at high speed. To silence the alarms, I shut off the vehicle and attempted to restart after powering down the device, replacing the mouthpiece, and waiting the required time. The device continued to fail.
As a result, I was stranded on the side of the highway in extreme cold temperatures (approximately −30°C), unable to restart my vehicle or access heat. I incurred towing and roadside assistance expenses and was placed in a situation that posed a serious risk to my safety.
This was not an isolated incident. If I recall correctly, I am currently on my fourth or fifth interlock device within a six-month period due to repeated failures. The device has proven unreliable, inconsistent, and unfit for continued use. The installation technician even acknowledged that the device does not function properly in cold temperatures, raising serious concerns about its suitability for Canadian climates.
The interlock device was installed under legal compulsion following a refusal charge. I have incurred hundreds of dollars in mandatory installation, maintenance, and replacement costs. Despite these expenses, the product does not perform as advertised and repeatedly fails under foreseeable and common environmental conditions.
In addition to safety risks, the device’s unreliability has caused measurable financial harm. I pay exactly $74.14 per month for a 12 month period, adding up to a grand total of $889.68 (And this doesn't even include installation) Why am I paying for a device that doesn't work? I have missed essential healthcare appointments due to device failures, resulting in approximately $250 in missed appointment fees. I routinely allow an additional 30–40 minutes to start my vehicle, anticipating the code "INVALID SAMPLE 05" multiple times and delays and failures continue to occur.
The design and operation of this device create foreseeable and preventable dangers. If serious injury or loss of life occurs as a result of these defects, the manufacturer should reasonably anticipate liability. I formally request that this complaint be investigated and that corrective action be taken immediately. Should injury occur to myself or others as a result of this product, I reserve all legal rights and remedies available to me.
This device requires immediate review, redesign, or removal from service. A product mandated for use in the interest of public safety must not itself create an unreasonable risk to drivers or the public.
FL
Fernando L.
The service I received was…extraordinary
The service I received was extraordinary excelente and the person that made it even better was Mrs Elisa who help me like she was part of my family
CU
Customer
Very bad customer service they charge…
Very bad customer service they charge you the customer for their device problems
MC
Malcolm C.
Device has mind of its own
The device is installed on a brand new vehicle. After installation i have to open my door shut my door push the start button x2 then open shut my door test pass test and have to retest every 7 to 10 minutes. Don't call the hot line absolutely useless