Viofo A139 Pro 3-Channel Dash Cam Review

Viofo sent me this early unit to test and review, but they had zero input in the contents of this review. I did not receive any compensation for the review other than getting the test unit.
The Viofo A139 is a 4K dash cam with either a 1-channel, 2-channel, or 3-channel configuration where the interior and rear cameras are 1080p. I was very impressed with the quality of this dash cam, but I did have some issues with parking mode not triggering correctly when there was motion.
LINKS - Note: these are regular URL's, not affiliate links. I do not use affiliate links because I feel that would be a conflict of interest when trying to give an unbiased review, so I don't make any money from these links.
Viofo A139 Pro: bit.ly/3KZViik (use promo code 'Brian Greenstone' to get $20 off!)
Hardwire Kit: viofo.com/accessories/211-323...
Remote Button: viofo.com/accessories/90-viof...
0:00 - Intro
0:34 - Design
1:25 - Polarizing Filter
2:02 - Slots, Ports & Buttons
4:57 - Mounting the Dash Cam
6:40 - Power & Hardwire Kit
7:54 - Front Day Footage
11:07 - Rear Day Footage
11:40 - Interior Day Footage
12:13 - Front Night Footage
12:33 - Rear Night Footage
12:48 - Interior Night Footage
13:03 - App Intro
14:37 - Live Preview
14:55 - App Settings
16:35 - Parking Mode
20:39 - Viewing & Downloading Video Clips
22:21 - Conclusion

[@RetroCarGuy530]

The 2K 60 FPS front camera resolution option is only available in the 1CH or 2CH configurations and only if the HDR feature is turned off. The screw holes are for an optional "tamper-proof" security plate that prevents the power cable, camera cables and the microSD card from being removed from their front camera connections.

[@tonychaveiro1906]

The "screw holes" are there to secure an optional accessory that locks the connections in place making the unit "anti tamper" so that the driver or another person can't just "disconnect" the cameras / power

[@claymitchell3060]

Thanks for the review! I just bought one of these and this was very helpful!

[@philbert9117]

Great review as always Brian!

[@shootersara]

I put a 1TB in mine. Works.

[@ramimoazin]

Thanks a lot we always trust your opinions. For this cam i found its become too heated at shade,, is it OK ?!

[@francisng859]

I have one installed that has the latest un published firmware. Found the front camera only work on 2K when the parking mode is enable.

[@cayman2010]

Can you review the Vantrue N4?

[@smithmal01]

Thanks for the content. Excellent video and well explained. I could be wrong, but I know for other dashcams only allow for parking mode if you are hardwired in. Was that done in this case or where you just using the stock 12V USB adapter that it comes with? I noticed a wire going down to your center console so maybe you were using the 12V USB adapter for power?

[@BrianGreenstone]

I did not have it permanently installed for that review. I use a power supply with a switch that basically simulates how the car would normally work. That way I can test these things without the hassle of actually installing it.

[@smithmal01]

Got it. I just know for some dashcams you need to use the hard wire kit which has a low voltage sensor attached to it so your battery doesn't completely drain if your dash cam is in park mode for too long. Perhaps because the dashcam didn't register the low voltage sensor it interferred with all the capabilities when using the dashcam's park mode. @@BrianGreenstone

[@cayman2010]

Parking mode super important to me! Wonder if it's fixed yet?

[@Bearsfan920]

Some dvd players still have the av connection, I actually have 1. Also does the power cord have a usb to c connection? There’s portable cellphone batteries chargers that can connect to it. There’s even dashcam batteries packs that it can connect to easily too, if that’s the case.

[@fredskaggs4222]

What sad card to use? Does it com in the box from Amazon.Thanks for your review

[@BrianGreenstone]

Best to buy a high endurance card that’s 128GB or 256GB on Amazon.

[@fredskaggs4222]

@@BrianGreenstone Thanks for the response

[@POfunnel]

Same model working, except for live view. Very frustrating. I'm taking videos and pics. Absolutely no idea if I'm doing something wrong or if its malfunctioning, because the videos are storing when using a Fat32, AND ExFat microSD. Weird, right? Not supposed to work without the correct format. Any ideas or comments about live video to an iPhone?

[@BrianGreenstone]

Are you able to get a stable Wi-Fi connection from your iPhone to the dashcam?

[@bigguy5360]

me too! What's up with that???

[@ViofoDashcamOfficial]

​@@bigguy5360 If you use an iPhone, please disable the VIOFO app from accessing cellular data. If your phone is Android, you'd better turn off the VPN on your phone and open the VPN in the app.

[@James-vi5hs]

Brian, what happened to the fisker karma ? Did you get rid of it. I just saw the video you did 11 years ago. I saw one for 20k and that's the nicest looking 4 door I've ever seen in my life. The way the hybrid system works is totally innovative. Like a train engine. Well let me know if you could, and thanks.👍

[@greenstonefinemineralia2136]

When Fisker was going bankrupt it seemed like a good time to sell it since I didn't want to get stuck with a brick in my garage. I loved that car (when it worked) for the 2.5 years that I had it, and whenever I see one driving around (which is rare) it makes me really sad. That was such a cool car.

[@James-vi5hs]

@@greenstonefinemineralia2136 A former owner, you would certainly know a lot more about it than I. From what I've been seeing, it looks like you made a wise decision. The last video I looked at was a RACING CAR mechanic wanting one for his wife. He couldn't find a service center he felt comfortable with so he went with something else. Personally, I feel it's ashamed a car with such great promise has to fall from grace. Thank you for responding.

[@philbou1]

Do you recommend Garmin 67 w or Viofo A 139 pro?

[@BrianGreenstone]

Very different cameras. Screen vs no screen, multichannel vs single channel, etc. both are good.

[@theofriesen9527]

Nanosaur 3 when?

[@qazaqdotcom2065]

This camera in 3 ch is very hot.

[@marryandreotti5077]

*promosm* 🤗

[@warpedphreak]

supports 512Gb. 256 is "recommended" by manufacturer. Be accurate.... "SCREW HOLES" are for anti tamper accessory. How can you "review" something and never bothered to learn basics of it? Shame on you....

[@BrianGreenstone]

Because it’s not in the manual. I go off what they give me.

[@PhotographerPhilosophy]

@warpedphreak How rude of a comment, why say anything if you’re going to piss on this guy for reviewing products for us?