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Viofo A129 Plus Duo - Best Budget 2-Channel Dash Cam of 2021 - - BlackboxMyCar

Viofo A129 Plus Duo - Best Budget 2-Channel Dash Cam of 2021

A reliable dash car is the perfect boost of confidence for your drive. Exceptional video quality, easy set-up and reliable parking mode recording - these are all must-haves in a great dash cam, like the new VIOFO A129 Plus Duo.

Thank you @PanzerPlatform for the VIOFO A129 Plus Duo product review. Check out what he has to say about this Best Budget-Friendly 2K Dual Channel of 2021.

My name is Chuck McCoy, and I’m a retired auto mechanic. I’ve also been a fan, and a tinkerer of consumer electronics my whole life. 18 months ago I took up the hobby of making YouTube videos with the core subject matter of performing preventative maintenance, repairs, and modifications to my vehicles. I started the YouTube channel to document my work for future reference. It got out of hand when people started watching my videos, and asking me for advice. That’s when manufactures, and retailers started sending me their products to test, and make video reviews with. And that’s led me to this point.

Keep in mind I’m new to the world of Dash Cams, and only have a few months of experience, and this is only the fourth Dash Cam I’ve owned. So everything here should be taken with a grain of salt, and any wild claims should be confirmed, and verified. I would however like to boast I’m a normal person of average intelligence.

First Look

Given my limited experience on Dash Cams in general, I'd like to offer an over simplified explanation of what I consider to be, the three classes of Dash Cams.

1.) Premium “top of the line” Class (around $500USD)
These are units from brands like Blackvue, Thinkware, and IRoad.
These three are made in Korea, everything else is made in China.

2.) Budget Class (around $200USD)
This is where the Viofo A129 Plus Duo resides.

3.) Gateway / Temporary Class (Sub $100USD)
Reliability / longevity is hit & miss. These may work great at first, but it doesn’t take long to reveal their shortcomings.

4-Channel Dash Cam Setup with the VIOFO A129 Plus

The Review

I believe the VIOFO A129 Plus Duo will be king of the “Budget 2-Channel Class” for 2021.

The A129 Plus is “brand new” for September 2020. But in a way it’s not new at all. It’s almost a culmination of the previous three offerings from Viofo, (A119, A129 Standard, A129 Pro 4K). It’s almost as if they’ve combined the best attributes of those cameras, and even fixed some of the issues users have experienced. I’m looking at you (overheating, and random beeping A129 Pro 4K).  

There’s one new thing that could be considered a game changer. And that’s the addition of a separate chipset processor located inside the rear camera housing. I don’t have any proof, but I believe Viofo added a second processor, and mounted it in the rear camera housing in an attempt to “share the processing load” and the subsequent heat production that comes along with it. I can confirm the front camera (main unit) runs 20℉ cooler than the rear camera unit by using a cheap hand held infrared pyrometer, (laser thermometer gun). I’m told by a much more experienced Dash Cam tester it should be OK, the rear camera runs hotter than the front camera because the SD Card is located in the front camera unit.  

I’ve been testing the VIOFO A129 Plus Duo for 33 days now. And after updating the firmware the camera has been almost 100% reliable.

1. Upgrade the Rear Camera (1080p@30fps) with the same unit in the Front (2K@60fps)

The front camera picture quality is literally amazing at this price point. The rear camera picture quality when judged on its own is adequate, but when compared to the front, it’s a major disappointment for me.

2. Having both a 2” LCD Screen, and Wi-Fi connectivity is redundant, and not in a good way

The LCD screen is taking up precious real estate that could be better utilized by installing a bigger heatsink to dissipate more heat, to increase reliability, and lifespan. Or relocate the GPS Module inside the main Camera housing. The current External GPS Module (built into windshield mount) complicates, and prohibits installation in another vehicle. Users that operate multiple vehicles that wish to use the dash cam must purchase additional GPS Modules ($20 each) because it’s built into the mount.

3. Increase the adjustability of both camera lenses so they can show the passenger compartment

I believe the current Viofo IR (infrared) camera has this functionality. If the A129 Plus Duo camera lenses could adjust to show the passenger compartment, this would provide a better value for money by being able to capture a police encounter, or similar.

4. Include the Hardwire Kit, and increase the price of the camera by $15.

Viofo’s marketing, and wording of the A129 Plus Duo is false & misleading when it comes to describing the camera’s Parking Mode Operation. I say this based on comments I’ve read by owner’s who purchased similar Viofo cameras who believed Parking Mode Operation would be functional without having to purchase additional hardware, or perform “semi-professional” electrical wiring installation.

Having the necessary Hardwire Kit included with the camera will provide a more informed, and transparent experience to the end user, and will ultimately increase customer satisfaction.

5. Enable the full capacity of the SD Card to be utilized when using the front camera only

When using the front camera only, the storage capacity of the SD Card does not increase. It appears the camera permanently partitions the SD Card for rear camera footage, even when the rear camera is not connected. If Viofo intends to sell “front only” A129 Plus Dash Cam units, they should properly code the SD Card writing protocol so the full capacity of the SD Card can be utilized.

This is the equivalent of an electric car having an advertised range of 300 Miles, but it can only be recharged up to 50% capacity.

6. Increase the main power cable length from 12’ to 15’

Having 3 extra feet of power cable will allow users to install the main camera unit on the rear window. I had to buy an additional longer cable to do so in my car.

7. Replace the Mono Microphone with a Stereo Microphone.

This would improve sound quality.

8. Increase the size of the rear camera to install a bigger heatsink to dissipate more heat

The rear camera operates 20℉ hotter than the front camera. Installing a separate chipset processor in the rear camera house was a step in the right direction for keeping the front camera cooler, but the rear camera housing size was not increased to accommodate the proper sized heatsink to dissipate the extra heat production.

9. Add AM/PM Time Format Option

This is frustrating for me because all video files are stored on the SD Card in AM/PM format. However when I view the footage, the text overlay is in 24 hour time format. I curse you Bill, for making me do unnecessary math. lol

10. Remove the H.265 recording option

The H.265 recording option creates more problems than it solves. The percentage of devices that can playback H.265 is the minority. The world is still on H.264, it’s going to take a while for the world to catch up.


Front Camera 2K@60fps picture quality is excellent, (rear camera 1080p@30fps is adequate)
Good night time / low light picture quality
Good Mic / Audio quality, (no wind noise)
Excellent Tech Support / Firmware Updates
Ease of use
Audio Alerts for recording malfunctions


Parking Mode requires an optional $15 Hardwire Kit, and “semi-professional installation”
Limited Camera Lens Adjustability, (no adjustment to show passenger compartment)
Viofo Smartphone App is not the greatest
SD Card recording time does not increase when using the front camera unit only
External GPS Module (prefer GPS Module to be internal)

Additional Notes:

  • Strongly recommend the use of High Endurance SD Cards.
  • Now I’d like to offer some ways Viofo could improve the A129 Plus Duo.

A word from BlackboxMyCar

Thank you @PanzerPlatform for the VIOFO A129 Plus Duo product review. Check out what other product reviews by our influencers and affiliates on the BlackboxMyCar Community page.

Interested in joining the BlackboxMyCar Team? Sign up to become a Safety Scout!

The VIOFO A129 Plus Duo is VIOFO's latest 2K offering and honestly, we have been quite impressed with its performance and video quality. The A129 Plus Duo comes in two different versions, an eMMC and a non-eMMC version. The difference - the eMMC model comes with a built-in 16GB flash storage while the non-eMMC version gives you the freedom to use any microSD card up to 256 GB. The non-eMMC model is exclusively available at BlackboxMyCar.

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