Viofo A329S Specs
– 2- or 3-channel dash cam
– Released 2025
– Max. resolution: front 4K, rear 1440p, interior 1440p
– Price (3CH): Amazon US / CA – more countries & vendors (ad)
– GPS
– Wi-Fi 6 (2.4 or 5 GHz)
– 2.4″ Screen
– Video format: MP4
– Codec: H.264
– Supports up to 512 GB MicroSD cards
– Up to 4TB external SSD
– Quad Core ARM Cortex A53 chipset
– Time and date stamp on video
– Parking modes: Buffered, low bit rate, time-lapse w/ night vision
– Interfaces: USB-C
– Lock file button
– Optional Bluetooth remote button
– CPL filter (included for front camera, optional for rear)
– Loop recording, auto on/off, G-Sensor, motion detection
– Operating temperature: from -20°C to 65°C (-44°F to 149°F)
– Storage temperature: from -20°C to 70°C (-4°F to 158°F)
– Apps for Android / iOS
– High Dynamic Range (HDR) x 3
– Internal capacitor instead of battery
– Internal microphone and speaker
– Adhesive mount
– Voice commands
Front Camera:
– Max. resolution: 3840×2160 (4K) @ 30fps
– Aperture: f/1.8
– Bit rate: 66 Mbps
– Sony STARVIS 2 IMX678 sensor
– Angle of view: 140° diagonal
– Size: 61mm x 99mm x 43mm (2.4″ x 3.9″ x 1.7″)
Rear Camera:
– Max. resolution: 2560×1440 @ 30fps
– Aperture: f/1.8
– Bit rate: 27 Mbps
– Sony STARVIS 2 IMX675 sensor
– Angle of view: 160° diagonal
– Size: 71mm x 30mm x 41mm (2.8″ x 1.2″ x 1.6″)
Interior (Fish Eye) Camera:
– Max. resolution: 2560×1440 @ 30fps
– Aperture: f/2.2
– Bit rate: 27 Mbps
– Sony STARVIS 2 IMX675 sensor
– Angle of view: 210° diagonal
– Size: 71mm x 30mm x 41mm (2.8″ x 1.2″ x 1.6″)
– 4 infrared (IR) LEDs
Comparison Of The Viofo A329S To The Viofo A329
The A329S is Viofo’s new flagship camera in the premium price segment. Key upgrades from the A329 are the addition of a third video channel, and the extended field of view of the interior camera.
Since we already have a very extensive review of the Viofo A329, here we’ll only go over the differences quickly, then do a short recap of what stays the same. And finally, we’ll take look at the impressive video quality of the A329S.
What’s New: Differences Between A329S And A329
- The A329S supports 3 video channels. Unlike older Viofo dash cams such as the A229 Pro, the quality of the main (front) video channel is not reduced when you add a 3rd channel.
- Generally, the 3rd channel will be an interior camera with infrared.
- The interior camera of the A329S has a fish eye lens. Thus, it records not only the passenger cabin, but also the view through the side windows.
- A number of alternative cameras are available for the 2nd and 3rd video channel. The most common configuration (and the only one available on Amazon, for now) is the one with the interior camera though.
- The HDMI port that the A329 had has been discontinued. This is to make room for the extra video channel port.
What Stays The Same
The A329S retains all the standout features of the A329, including:
- External SSD support: Up to 4TB (Terabytes) of external storage. Make sure to get a compatible SSD (see documentation from vendor, or check the A329 review where we’ve already listed them).
- Quad band GPS: GPS, GLONASS, Galileo, Beiduo
- Low power parking mode (can’t record to SSD in this mode though)
- Wi-Fi 6 — about 3x faster than legacy Wi-Fi (Wi-Fi 5)
- Voice commands
- Front CPL filter included
- Optional rear CPL
Comparison A329S Vs. A229 Pro
The main difference here is that the fornt channel of the A329S records at a higher bit rate (66Mbps) when in 3CH mode. When the A229 Pro is used with 3 video channels, the bit rate of the front channel is reduced from 60 to 36 Mbps.
This is due to the increased processing power of the A329S.
Another very noticeable difference is the improved video quality of the interior channel, and of course the fish eye effect that allows you to see the driver’s and passenger’s side windows.
Alternative Secondary Cameras
For the 2nd and 3rd video channel, the “default” A329S configuration is a rear camera, and an internal camera with infrared.
Alternatively, Viofo have a waterproof rear camera and a telephoto camera on offer. The waterproof camera is intended for installation on the outside of the vehicle, which is useful if you don’t have a rear window (e.g. in a truck).
The telephoto camera, on the other hand, records the road ahead. It allows you to more easily capture license plates at a distance.
Any combination of these would work, for example you could get two waterproof cameras and mount them anywhere inside or outside your vehicle (as long as the cable is long enough).
User Manual
The user manual for the Viofo A329S is available in English, Chinese, and German. The English version is 67 pages long, and of excellent quality.
Viofo A329S Video Quality & Samples
For full original video quality, make sure to watch on full screen and select maximum video resolution (use the cog icon in lower right corner). You may have to rewind the video after changing the resolution.
Our video scores go from 0 (poor) to 5 (excellent). For an explanation of video scores check the annotations below the comparison tables.
Front Video Sample, Day
Forward video quality during the day is very good (4.0/5). You can read license plates of other cars just driving by.
Front Video Sample, Night
Forward video at night is also very good (4.0/5). Again, you can read license plates of other cars without any problem.
Rear Video Sample, Day
Rear video at day is also very good (4.0/5).
Rear Video Sample, Night
As is to be expected, rear video at night is a bit weaker than the others. We can read the license plate of the car behind us easily, but with the other cars, it’s a bit hit and miss. Our verdict: Night rear video quality is good (3.0/5).
Interior Video Sample, Day
Interior video at day is excellent. The pronounced fish eye effect takes some getting used to, but it allows us to see every detail of the passenger cabin and provides a complete view through the side windows, from the driver’s side all the way to the passenger’s side. Score: 5.0/5
Interior Video Sample, Night
This is in the same video as above, starting at the time stamp 25:40. Video quality is very good (4.0/5). Again, we can see all the details, except obviously that it’s in black and white due to the infrared illumination. We also have a clear view through the side windows at night.
Total Video Score
Our total video score for the Viofo A329S is 4.0/5 (the average of the scores for each channel by day and night). This is the best score any 3 channel dash cam has reached so far.
You can see the video scores of other dash cams in our 3-channel dash cam overview table.
Conclusion
As of September 2025, the Viofo A329S is the dash cam with the best video quality, by far. This is true both in 2CH and 3CH modes of operation.
Its only significant drawback is the lack of cloud support, a feature offered by most other major brands.
External SSD support is a nice plus, especially since with the high bit rates of this camera, memory cards will fill up relatively quick.
Wi-Fi 6 is another excellent feature to have. As video file sizes increase, the increase in transmission speed (3x compared to Wi-Fi 5) is more than welcome.
All in all, this is an excellent premium dash cam with many cutting-edge features, and outstanding video quality.
Pros:
- Very good video quality overall
- Up to 4TB external SSD
- Wi-Fi 6 (3x faster download speed)
- Quad-band GPS
- Reliable brand
- Fish eye interior lens (default for the 3rd channel)
- Supports various alternative camera configurations (telephoto, water proof, fish eye IR)
Cons:
- No cloud
- High price
Compare Prices & Order Today
The Viofo A329S is available in several configurations. Here’s the 2-channel version, with front and rear camera:
Amazon US / CA / DE / FR / ES / IT
This is the 3CH version, front and rear channels plus an interior camera with fish eye lens and infrared:
Amazon US / CA / DE / FR / ES / IT
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