Installing a VIOFO A329T 3CH into a 2024 Toyota Sienna XSE Hybrid

Next up, we will mount the A329T’s front camera. Ensure to check the camera’s live-view to ensure the best positioning and viewing angle, and that it’s in range of the windshield wipers. This can either be done through the VIOFO App or the front camera’s built-in LCD screen. The owner of this Sienna wanted the front camera hidden from their point of view, so we mounted it over the dot matrix patch on the passenger side to conceal it behind the rearview mirror.

Now that your front camera is mounted, it's time to get it wired up. Starting from the camera, we plugged the USB-C connector of the HK6’s output cable into the GPS mount and removed the plastic sensor housing from behind the rearview mirror. We wired across from the passenger’s side of the windshield, tucking the cable into the headliner using a trim tool, to the driver’s side A-pillar.

From here, it’s just a matter of loosening the A-pillar trim to ensure the cable can be safely routed down the A-pillar. You can use the trim tool to do this; just ensure you’re careful to avoid breaking the trim or any clips that hold it on. Once done, it’s important to ensure the cable is routed behind the airbag, rather than over it, to ensure it isn’t obstructed in the event of a collision. Then, simply route the output cable down and through the side of the dashboard until it comes out at the bottom, and finish off by plugging it into the HK6’s power module

It’s time to mount the VIOFO A329T’s Telephoto Camera. In this case, mounting the telephoto camera is just like mounting the front camera—the only difference is that it’s zoomed in to capture 4X further down the road. Since the owner of this Sienna also wanted it hidden from their point of view, we mounted it up high next to the front camera so it, too, can be hidden from the driver’s perspective by the rearview mirror.

We also have two lengths of connecting cables as part of this three-channel system. We'll be using a short 3ft/1m coaxial cable to connect the front-facing camera to the telephoto camera. Then there's a longer, 20ft/6m coaxial cable that will connect to the rear-facing camera.

After connecting our front-facing main camera to our telephoto camera, the next step will be to tuck the excess wire into the headliner.

Following the front and telephoto camera, we'll move on to the rear camera. Start by connecting its cable to the front camera, then run it across to the driver’s side A-pillar, tucking it into the headliner. Once there, ensure the cable is routed behind the airbag, then run the cable along the van's B-, C-, and D-pillars, removing the rubber door seals and loosening trim panels for easy access, steering clear of any airbags. Like many modern minivans, the 2024 Sienna Hybrid has fairly large C- and D-pillar trim panels, each held on by several plastic clips, so it’s important to take extra care when loosening these to avoid any potential damage.

Since the Sienna has a rear liftgate, we had to wire through one of the rubber grommets connecting it to the rest of the vehicle. After choosing a grommet to wire through by squeezing each one to feel how much wiggle room is inside, it should be loosened first. After loosening the grommet on both sides using a trim tool, we removed the plastic trim at the top of the liftgate opening to access the grommet’s entrance.

On the liftgate, we removed the third brake light assembly to access the grommet’s exit. The electrical connector attaching this to the vehicle’s main harness must be carefully unplugged, as doing otherwise will risk breaking it. For this install, we fished the cable from the van’s body, through the grommet, and out into the liftgate.

Next, install the rear camera on the rear window. Since this Sienna’s third brake light protrudes into the rear window, we mounted it offset to the left to minimize the amount of exposed wiring while keeping it as centred as possible, within the rear wiper’s range at that. Note that it should not be installed on top of the rear defroster lines or with any blocking its view. As with the front camera, we recommend you check the live view of the rear camera before mounting to ensure it’s working and positioned properly.

If you have any extra slack or excess cabling in your rear cable, we recommend bundling it up using electrical tape or a zip tie and tucking it away between the headliner and roof panel.

Finally, all three cameras have been installed and connected, and the system has been hardwired to the fuse box. The final step is to start the van, test this three-channel system's functionality, and adjust its settings.

Check if the dash cam turns on automatically, as well as noting if it goes into parking mode when the van is shut off. If it doesn't turn on, check the power connections and ensure the dash cam is properly mounted. If it doesn’t go into parking mode, make sure it is enabled in the settings, and that the low-voltage cutoff threshold on the power module isn’t set too high.

Now that our cameras are installed and wired up, it’s time to clean up any loose wires and reinstall any trim pieces, door seals, and grommets that were removed.

And that's how you hardwire the VIOFO A329T 3CH into a 2024 Toyota Sienna Hybrid! With this installed, you can now enjoy not only the high-quality front and rear recording that VIOFO is famous for, but also the added protection of a 4X Telephoto Camera and Hybrid Parking Mode.