No Products in the Cart
English
German
French
Italian
The Polestar 2 cabin is intentionally minimal. A suction-cup dash cam dangling from the windshield or a power cord snaking down the A-pillar instantly breaks that Scandinavian design language. If you have spent any time in EV forums, you already know the frustration: universal cameras record fine, but they look aftermarket the moment you sit in the driver’s seat. Worse, routing their cables cleanly in an electric vehicle with tight panel gaps can take hours and still leave a visible mess. That is why a dedicated Polestar dash cam designed for this exact car is worth the investment.
That is exactly why a vehicle specific solution wins. The Mercylion G390 is a Polestar 2 dash cam built to disappear behind the rearview mirror. It uses the factory overhead control box for power, keeps every wire hidden, and delivers up to 4K front recording without a single modification to your car. This guide walks you through the entire Polestar 2 dash cam installation from unboxing to first recording, with real-world tips we learned from the install video and from owners who have already done it.
Quick Answer: A typical Polestar 2 dash cam installation with the Mercylion G390 takes 20 to 35 minutes, requires no wire cutting, and is rated easy-to-moderate for anyone comfortable with basic trim removal.
Universal dash cams are fine for temporary use, but they force compromises that matter more in a Polestar than in most cars. The windshield is steep, the mirror housing is compact, and the interior panels are not designed to hide aftermarket cables. After a few weeks of looking at a dangling cord, most owners wish they had gone with a cleaner solution.
| Feature | OEM Style / Hidden Dash Camera | Universal Dash Cam |
|---|---|---|
| Appearance | Disappears behind the mirror; factory look | Suction mount + visible body on windshield |
| Wiring | Hidden inside the overhead console; No Wiring exposed | Long power cable routed to 12V socket or fuse box |
| Installation | Plug & Play harness connects to existing connector | Hardwire kit or cigarette-lighter adapter required |
| Vehicle Fit | Custom fit for mirror housing shape | Generic bracket may block sensors or view |
| Warranty Risk | No cutting or splicing; lease-friendly | Hardwiring can raise questions if not done cleanly |
| Resale / Lease Return | Easy to remove and revert to stock | Adhesive residue and cable clips left behind |
The G390 is not just a camera clipped onto your mirror. It is an Integrated module that replaces or attaches directly to the factory mirror trim, uses the same power source as the auto-dimming mirror and rain-sensor cluster, and leaves zero visible wiring. For a lease car or a daily driver you plan to keep long-term, that matters.
Key advantages of going OEM style on a Polestar 2:
The Mercylion G390 is listed for the Volvo Polestar 2 2021-2026. Polestar has made running changes to trim, software, and mirror hardware over those years, but the overhead console and rain-sensor harness remained consistent through the 2026 model year. If you own a 2022 Polestar 2 dash cam candidate or a 2023 Polestar 2 dash cam candidate, the same G390 housing and harness apply.
| Model Year | Trim Notes | Mercylion Part | Power Source |
|---|---|---|---|
| 2021-2026 | Verify mirror housing shape before ordering | G390 | Overhead console Y-harness |
Always confirm your mirror housing photo with the seller before ordering. Mercylion requests a photo of the rearview mirror casing for some Volvo models to avoid shipping the wrong adapter. For the Polestar 2, the G390 is the confirmed match for the 2021-2026 mirror shape.
The G390 box includes two power cables. You can choose the one that best fits your use case.
| Power Method | How It Works | Best For | Parking Mode |
|---|---|---|---|
| Overhead Console Y-Harness | Unplug factory mirror harness, insert splitter, plug camera in | Cleanest install; most owners | Not support |
| OBD Power Cable | Plugs into the OBD-II port below the dash | Quick testing | Support |
Most owners use the plug & play overhead harness for daily driving because it is invisible and turns the camera on and off with the car. The OBD cable is useful as a backup or if you want an alternative power path, but it leaves a small connector visible under the dash.
Mercylion sells the G390 in three packages. Choose based on whether you want front-only coverage or front-plus-rear protection.
The included pry tool is all you need for the front camera install. For the rear camera, you may want a second plastic pry tool and a few cable-routing clips, although the extension cable is long enough to follow the headliner and C-pillar on the Polestar 2.
Total time: 20–35 minutes for front only; 45–60 minutes if adding the rear camera. Difficulty: Easy to moderate.
Park the Polestar 2 on level ground, shift into Park, and power the car down. For this install, everything happens at the windshield. Gather the G390 camera, the overhead-console Y-harness, and the pry tool. Leave the OBD cable in the box unless you plan to use it.
Pro Tip: Take a photo of the overhead console before you touch it. If a clip breaks or a panel orientation feels confusing later, the photo is your reference for reassembly.
The factory electronics for the mirror, rain sensor, and forward cameras live inside a plastic control box mounted to the windshield directly above the rearview mirror. Start at the front edge of this cover with the included pry tool. Work gently around the perimeter, releasing the spring clips one at a time. The cover should pop free with light, steady pressure.
Do not yank. The clips are small plastic tabs, and excessive force can crack the cover or the retaining tabs. Once loose, slide the cover upward and set it on a soft surface.
Pro Tip: If the cover feels stuck at the front-left corner, that is normal. Apply gentle pressure while wiggling the pry tool slightly. The clip will release once you find the right angle.
STEP 2 — Pry off the overhead mirror control box cover
The G390 Dashcam connect with the Volvo Polestar 2 original cover.
Once removed, you will see the mirror mounting stalk and the factory wiring harness connector. This is the connector the Y-harness will plug into.
Pro Tip: Lay the removed trim pieces in order on your workbench or passenger seat. Reinstalling them in the correct sequence is much easier when you remember which piece came off first.
STEP 3 — Pull Out the Factory Connector to Prepare Install the Y Harness
Locate the factory wiring connector that feeds the auto-dimming mirror and rain-sensor cluster. Press the release tab and unplug it. Take the Mercylion Y-harness and plug the male end into the factory vehicle socket. Then plug the female end into the original mirror connector. Finally, plug the camera lead from the Y-harness into the G390 module.
The harness is keyed, so it will only connect one way. You should hear or feel a solid click on each connector. Tuck the extra wiring into the cavity behind the mirror, keeping it clear of the rain sensor window.
Pro Tip: The extra cable length has to live somewhere, and the front cavity is too shallow. Route the excess wiring toward the back of the control box cavity where there is more room. This prevents the cover from bulging when you snap it back on.
STEP 4 — Connect the Plug-and-Play Y-harness Splitter
Then Connect the Y-harness Splitter to Dashcam
The G390 housing clips onto the mirror mounting stalk in place of the small inner trim piece you removed. The camera body sits flush beneath the overhead console, lens facing forward. Reinstall the inner trim piece first, then the main control box cover. Work the cover clips in reverse order, starting at the rear and finishing at the front.
Some owners report that the front-left corner can be stubborn. If it does not click in immediately, press firmly along the seam with your thumb and give the corner a light tap. Once seated, the cover should sit flush all the way around.
Pro Tip: Before you fully snap the cover closed, look up at the camera lens from the driver’s seat. Make sure it is centered and unobstructed by the mirror housing or trim. Adjust the angle now; it is harder to fine-tune once the cover is locked.
STEP 5 — Mount the G390 module and snap the cover back on
If you bought the front-and-rear package, route the rear-camera extension cable from the front housing across the headliner toward the rear window. In the Polestar 2, the headliner has enough flex to tuck the cable behind it without removing the A- and C-pillar trims. Run the cable along the passenger side to keep it away from the driver’s airbag path.
Mount the rear camera to the upper center of the rear windshield using the included electrostatic film or adhesive pad. The rear module is 270° rotatable, so you can point it directly out the back window even if the mounting surface is angled.
Pro Tip: Leave a small service loop of cable near the rear camera. If you ever need to remove the camera for cleaning or replacement, the extra length prevents you from pulling the entire front-to-rear run loose.
Start the Polestar 2. The G390 should boot automatically and begin recording within about ten seconds. Look for the status LED visible from below the mirror. Download the Mercylion app, connect to the camera’s Wi-Fi network, and check the live view.
Verify three things before you call the job done: 1. The front lens has a clear, level view of the road. 2. The timestamp and loop-recording indicator are active. 3. A short test clip plays back smoothly on your phone.
Pro Tip: Format the MicroSD card through the app on first use. Even though the card comes pre-installed, a fresh format ensures the file structure matches the camera’s firmware and reduces the chance of corrupted clips.
The G390 is not just about a clean install. It is also a capable recorder. Here is what each version delivers.
The 4K front module uses the Novatek NT96565 processor and records at 3840×2160. At 145° diagonal, the lens captures three lanes of traffic without the heavy barrel distortion common in wider action cameras. The 8-megapixel effective pixel count and H.264 encoding keep file sizes reasonable while preserving license-plate readability in daylight.
The entry 2K version uses the Novatek NT96675 processor at 2560×1600. It still offers the same F1.4 aperture and 145° field of view as the 4K line, making it a strong value option if you primarily need evidence-grade footage for insurance claims rather than cinematic clarity.
The front lens uses a 2G4P+IR waterproof glass group with an F1.4 aperture on the 2K model and F1.5 on the 4K models. The wide aperture pulls in more light than typical dash cams, which helps in underground garages, tunnels, and dusk driving. The IR-cut filter prevents color cast during the day while improving infrared sensitivity after dark.
The optional rear module records at 2K with a 5-megapixel sensor, F1.6 aperture, and a 270° rotatable body. That rotation is important in the Polestar 2 because the rear windshield is steeply raked. You can mount the camera on the angled glass and still point the lens horizontally out the back.
All three G390 versions include 802.11b/g/n/ac Wi-Fi. The app lets you view live footage, download clips, change resolution and loop duration, and format the card. Download speeds are fast enough that you can pull a one-minute incident clip to your phone in the parking lot without removing the card.
Parking monitoring is collision-triggered. When the car is off, the G390 sleeps until the triaxial accelerometer detects an impact. It then starts recording 15 to 20 seconds after the collision, depending on the version. This is not a buffered pre-event parking mode, but it is sufficient for hit-and-run protection in most parking situations.
GPS logging is supported, but the external GPS module is sold separately. If you add it later, the camera will embed speed and location data into the video file. For owners who do not need speed stamps, the base camera works perfectly without the extra module.
The G390 records in 1, 3, or 5-minute segments and overwrites the oldest non-locked files when the card is full. Supported cards are Class 10 or faster, up to 256 GB. The 64 GB card included with the front-only packages holds roughly six to eight hours of 4K footage before looping begins. The 128 GB card bundled with the dual-channel kit roughly doubles that.
Rated for -20°C to 65°C operating temperature and -30°C to 85°C storage, the G390 handles hot summer cabins and cold winter mornings. The ABS+PC housing resists warping, and the waterproof lens group prevents fogging behind the windshield.
No. The G390 uses a plug & play splitter harness. You are not cutting, splicing, or tapping into factory wiring. You can return the car to stock in minutes, which makes this install lease-friendly.
Only to another Polestar 2 with the same mirror housing. The G390 is vehicle specific and shaped for the Polestar 2 overhead console. It will not fit a different model without the correct adapter bracket.
Yes. The G390 includes a built-in microphone and speaker. You can enable or disable audio recording in the app. In some regions, recording audio inside the vehicle has legal implications, so check local laws and inform passengers if required.
When powered through the overhead console, the camera turns off with the car. The OBD cable may stay live longer depending on your car’s sleep cycle, for long-term airport parking, consider choose short time lapse of parking mode time or disabling parking mode.
The G390 pairs with the Mercylion app. Connect to the camera’s Wi-Fi network, open the app, and the live view should appear. Default Wi-Fi credentials are usually printed on the camera or in the manual.
A Polestar 2 dash cam should protect your car without ruining the cabin design that made you choose the car in the first place. The Mercylion G390 nails that balance. It is custom fit for the 2021-2026 Polestar 2, records up to 4K front video, and installs with a true plug & play harness behind the mirror. There are no visible wires, no adhesive discs on the windshield, and no compromises on image quality.
Whether you drive a 2021 Launch Edition or a 2023 Polestar 2 dash cam candidate, the install process is the same and the result is equally clean. Spend thirty minutes once, and you will have evidence-grade footage every time you drive.
Ready to install? Grab the Mercylion G390 for your Polestar 2 directly from the official store or through Amazon:
This installation guide is based on the video review and install walkthrough by Paul’s Views & Reviews:
Last updated: August 7, 2026
