Viofo A329T: Long-Term Review

TonyM

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Dash Cam
Many dashcams over many years
Thank you to @viofo for sending a 3CH A329T to me for test and review, complete with a HK6 hardwire kit. In addition, I purchased 2No CPL filters for the rear and telephoto cameras, a spare mount and second HK6 for indoor testing, plus the BTR-200 bluetooth remote.

IMG_0090.webp


I have had the A329T installed in my car for 9 months, from last summer and throughout the winter. The A329T has been the most consistent, reliable, high-performing, and feature-rich dashcam that I have used. From high contrast summer sun to low winter sun, through snow, rain, cloud and fog, both day and night, whilst driving and when parked, it records video to a high standard on all 3 channels.

I have given feedback to @VIOFO-Support on a few minor things that I encountered during testing, primarily during beta testing of the V2.0 firmware. Overall my experience with the A329T has been extremely positive, and I'm confident it will remain my primary dashcam for a number of years to come.

For context, I have previously tested the A119, A129 Duo, A129 Pro, A139 and A139 Pro. I skipped the A229 series, partly due to family demands at the time, and because the models did not quite seem complete – there was always something missing for my intended use – 3CH with telephoto. Some readers will know that I have experimented with DIY telephoto cameras for many years, opening up dashcam bodies and replacing the manufacturer's lenses with third-party telephoto lenses, with varying degrees of success. Finally, with the 3CH A329T I had the opportunity to try Viofo’s telephoto camera in combination with the standard 4K front and 1440P rear cameras.

IMG_0092.webp


The A329x series is a mature system that builds on the successes and lessons learned from the previous Viofo dashcam series and offers a wide range of hardware and firmware options that users can customise to suit their needs. The recent firmware update to V2.0 adds some welcome features that strengthen the offering even further.

The key features that stand out to me and suit my driving patterns are:
  • High-quality 4K front camera with effective HDR and low motion blur
  • High-quality 1440P rear camera
  • High-quality 1440P 4x telephoto camera
  • Consistent, reliable performance
  • Multiple camera options for both remote channels
  • Hybrid parking modes
  • Quick start from Low Power Impact Detection mode
  • Customisable Bluetooth remote
  • Geofencing
  • CPL option on all 3 channels
Note that I have not tried the external SSD option so I cannot comment from experience on its functionality or reliability, although I have read a number of reviews here on DCT and it appears that some users are very happy with their external SSD whereas others suffer various reliability issues.

I recently purchased a second telephoto camera to use in place of the standard rear camera, so now I have an A329TT with front & rear-facing telephoto alongside the main 4K front camera. I will create a separate thread to discuss the pros and cons of using a rear telephoto camera.
 
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What are your top 5 cons, (as in pros & cons)?
What are your top 5 things you would improve for the next model / generation?
 
What are your top 5 cons, (as in pros & cons)?
What are your top 5 things you would improve for the next model / generation?
@viofo @VIOFO-Support

Suggestions to improve the current model:
- Reduce bootup start time
- Offer just one mobile companion app
- Increase the duration from impact to ignition that is ignored, to reduce the number of false-positive impact notifications in parking mode (This may have been fixed in the latest FW that I downloaded this week)
- Eliminate colour banding on rear camera in daytime HDR (may require new lens?)
- Enhance low light capture in low bitrate parking mode, without having to use 1fps SNV timelapse mode

Suggestions to improve the next model:
- STARVIS 3 for high dynamic range without blur/ghosting
- Reduce power consumption in Low Power Impact Detection parking mode
- Allow user to name the geofence locations, either in-camera on in the app, and show the location & radius within the app
- Ball joint for the interior camera, to increase the range of aiming directions / mounting locations
- Maintain backwards-compatibility with the current range of external cameras. No new connectors please.
 
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@viofo @VIOFO-Support

Suggestions to improve the current model:
- Reduce bootup start time
- Offer just one mobile companion app
- Increase the duration from impact to ignition that is ignored, to reduce the number of false-positive impact notifications in parking mode (This may have been fixed in the latest FW that I downloaded this week)
- Eliminate colour banding on rear camera in daytime HDR (may require new lens?)
- Enhance low light capture in low bitrate parking mode, without having to use 1fps SNV timelapse mode

Suggestions to improve the next model:
- STARVIS 3 for high dynamic range without blur/ghosting
- Reduce power consumption in Low Power Impact Detection parking mode
- Allow user to name the geofence locations, either in-camera on in the app, and show the location & radius within the app
- Ball joint for the interior camera, to increase the range of aiming directions / mounting locations
- Maintain backwards-compatibility with the current range of external cameras. No new connectors please.

What new firmware? I don't see an update for the A329T or are you referring to the A329TT firmware?

I also find the cameras hard to adjust (Rear and Telescopic) and agree that a ball joint would likely be a better choice. These cameras are quite stiff and difficult to move up and down.

- Eliminate colour banding on rear camera in daytime HDR (may require new lens?)

Can you elaborate further and provide a screenshot / video where colour / color banding is an issue? Does this happen with and without a CPL filter?
 
- Eliminate colour banding on rear camera in daytime HDR (may require new lens?)

Can you elaborate further and provide a screenshot / video where colour / color banding is an issue? Does this happen with and without a CPL filter?
I've run into this as well. VIOFO has stated that the rear camera lens is likely the root cause of this issue. My A329S 3CH rear camera does not have any CPL filter installed.

a329s_3ch_rear_2026_0417_094507_016475R.MP4_snapshot_00.02.webpa329s_3ch_rear_2026_0417_110215_016714R.MP4_snapshot_00.23.webp
 
What new firmware? I don't see an update for the A329T or are you referring to the A329TT firmware?
I finally updated to V2.0 260104 last week.
 
- Eliminate colour banding on rear camera in daytime HDR (may require new lens?)

Can you elaborate further and provide a screenshot / video where colour / color banding is an issue? Does this happen with and without a CPL filter?
I observed this colour banding on the rear camera, with and without a CPL, but only with HDR enabled. My rear screen has no tint.

Screenshot_20250928-074659.webp


As @rcg530 noted, Viofo think the issue is the lens. I stopped using HDR on the A329S rear camera so it was no longer an issue for me.
 
I also find the cameras hard to adjust (Rear and Telescopic) and agree that a ball joint would likely be a better choice. These cameras are quite stiff and difficult to move up and down.
For the rear and telephoto cameras I prefer the current barrel design that only has up/down movement. It is less prone to vibration or accidentally moving out of alignment.

My recommendation for a ball joint comes from experience of testing the Vueroid S1 4K. The off-centre articulated joint on the cabin camera is surprisingly versatile, and although it does vibrate a bit, I think this is less noticeable on an interior camera.
 
For the rear and telephoto cameras I prefer the current barrel design that only has up/down movement. It is less prone to vibration or accidentally moving out of alignment.

My recommendation for a ball joint comes from experience of testing the Vueroid S1 4K. The off-centre articulated joint on the cabin camera is surprisingly versatile, and although it does vibrate a bit, I think this is less noticeable on an interior camera.

I haven't noticed any vibration on the Telescopic or Rear Camera. I'll check again. I liked the A139 Pro barrel design as the camera was far easier to adjust than the A329T Telescopic and Rear camera. They are harder to move the lens up and down. A good thing in a sense, as they won't come out of alignment, but difficult to adjust in beginning.

I observed this colour banding on the rear camera, with and without a CPL, but only with HDR enabled. My rear screen has no tint.

View attachment 90992

As @rcg530 noted, Viofo think the issue is the lens. I stopped using HDR on the A329S rear camera so it was no longer an issue for me.

On the banding, is this only on the Rear Camera? What about the Telescopic Camera with HDR enabled? Since my window is tinted (front and rear), I don't enable HDR on the rear as it's moot. Did Viofo say if this is a Firmware issue or is it a design issue? You'd think CPL would eliminate banding.
 
I've run into this as well. VIOFO has stated that the rear camera lens is likely the root cause of this issue. My A329S 3CH rear camera does not have any CPL filter installed.

View attachment 90991View attachment 90990

Your camera seems further away from the rear windshield than normal. Would placing directly on the glass make any difference on the banding?
 
For the rear and telephoto cameras I prefer the current barrel design that only has up/down movement. It is less prone to vibration or accidentally moving out of alignment.

My recommendation for a ball joint comes from experience of testing the Vueroid S1 4K. The off-centre articulated joint on the cabin camera is surprisingly versatile, and although it does vibrate a bit, I think this is less noticeable on an interior camera.
Yes, only the Interior camera needs a ball joint like the S1-4K.
The rear & telephoto cameras don't need the ball joint because they are "always" mounted in the center of window glass.
But the interior camera "always" has obstacles in the way like the rear view mirror, and such.
 
- Eliminate colour banding on rear camera in daytime HDR (may require new lens?)
Does "Color Banding" only occur when the camera is behind window glass?
What I mean is, will there still be "Color Banding" if you hold the rear camera outside with nothing in front of it like this?
HDR if off in this video.

 
@TonyM
I’m not seeing the “Color Banding” in my REAR camera test footage.
Is that because I don’t have HDR enabled?

 
Your camera seems further away from the rear windshield than normal. Would placing directly on the glass make any difference on the banding?
The A329S rear camera is mounted directly on the rear window glass. The rear window glass does have a steep angle to it, but it's not abnormal for a 4-door Chevrolet/Holden sedan.

1776579548408.webp
 
@TonyM
I’m not seeing the “Color Banding” in my REAR camera test footage.
Is that because I don’t have HDR enabled?

The color banding is very noticeable with HDR enabled and the sun usually must be behind the vehicle shining directly onto the rear window glass / A329S rear camera lens.
 
Another A329S rear camera in my Chevy HHR also shows the color banding with HDR enabled. The rear lift gate window glass for the Chevy HHR is near vertical and the A329S rear camera is mounted directly on the rear window glass.

a329s_3ch_rear_hhr_2026_0303_085806_005727R.MP4_snapshot_00.55.webp
 
@TonyM @rcg530

I’m so confused.

1.) Is this “Color Banding” problem caused by software, or hardware?
Software = HDR
Hardware = Lens

2.) A329S was released May 19, 2025, (almost 1 Year ago).
Why are we just now hearing about this Color Banding problem now?

3.) Why didn’t we have this “Color Banding” problem with A329 2CH (2024)?
A329 2CH (2024)
A329S 3CH (2025)
Both use same exact Rear Camera.

 
@TonyM @rcg530

I’m so confused.

1.) Is this “Color Banding” problem caused by software, or hardware?
Software = HDR
Hardware = Lens
I think it's a combination of a lens issue (e.g. flare) accentuated by the HDR processing.

2.) A329S was released May 19, 2025, (almost 1 Year ago).
Why are we just now hearing about this Color Banding problem now?
I reported this to Viofo in Sept 25. I believe they were already aware of Robert's similar report.
 
Does "Color Banding" only occur when the camera is behind window glass?
What I mean is, will there still be "Color Banding" if you hold the rear camera outside with nothing in front of it?
Just tested holding the camera outside the car, it's still there.
 
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