make driving chill

comma 3X

harness included
SALE: $1299
or $113/mo with Affirm. Prequalify now
Payment options through Affirm are subject to an eligibility check and are provided by these lending partners.
Add to cart
  • Storage Size
    The more storage you have, the more driving video you can store on your comma 3X. 32GB is ~1 hour of footage, 250GB is ~12.5 hours of footage, and 1TB will store ~50 hours.
  • Upgrade to UPS 2-day Air for $25
    US only. Rush orders are fulfilled on the next business day.

    Free ground shipping on all US orders. International shipping is $30 flat rate. See fine print below for details. Common shipping questions are answered on the FAQ.
  • Try our 30-day money-back trial
    See for yourself why Consumer Reports rated us as the top ADAS system. We think you’ll love it, but if you’re not satisfied, send it back for a full refund.
  • 1-year hardware warranty
    1-year limited warranty against hardware defects.

Meet the comma 3X

The comma 3X is custom hardware designed to live in your car, and purpose built to run openpilot. The comma 3X has three beautiful HDR cameras, two cameras to watch the road and one night-vision camera to see inside the car.

Besides cameras, the comma 3X has a suite of connectivity and sensors including cellular LTE, Wi-Fi, an IMU, high-precision GPS, and microphones.

make driving chill

In the Box

comma 3X

1.5 ft right-angle OBD-C cable

2 mounts (with adhesive and alcohol wipes)

On-device Storage

comma 3X includes on-board storage to store your drives.
built in storage
~4.5 hours of footage
Want your video footage saved for longer? – Sign up for comma prime for 1 year of cloud video storage.

comma 3X includes one free month of comma prime (must be activated within 30 days of purchase). To claim your free prime, log into comma connect. Once paired, you can see your recorded drives, set navigation destinations, and more.

Tech Specs

Three 1080p cameras w/ 140 dB of dynamic range: dual-cam 360° vision and a narrow cam to see far-away objects
Qualcomm Snapdragon 845
Supports CAN FD vehicles without extra hardware
128GB built in storage
- Wi-Fi
- High-Precision GPS
IR LEDs for interior night-vision monitoring
2160x1080 Beautiful OLED display
- OBD-C port (USB-C w/ CAN)
- USB 3.1 Gen 2 port
comma 3X
Installation Guide
7 steps
30 min
car harness
comma 3X is compatible with 275+ cars
A supported vehicle is one that just works when you install a comma device. All supported cars provide a better experience than any stock system.
Works with openpilot
comma 3X ships without software installed, so you need to install software. It is compatible with openpilot and works with a wide variety of community supported forks.
Try our 30-day money-back trial and see why 92% of buyers keep their comma 3X and why Consumer Reports rated us as the top ADAS system.

Fine Print

30-Day Return
If for any reason you are dissatisfied with anything purchased at the comma.ai shop, ship it back within 30 days for a full refund. comma.ai/returns

If you intend to upstream support for a new car model, we will extend your return window.

Free shipping via UPS (US only); signature confirmation required. International shipping is a $30 flat rate; customs/duties/taxes are between you and your country. Please see FAQ for more information.

Your rate will be based on credit, and is subject to an eligibility check. Payment options through Affirm are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required.

1-year limited warranty against hardware defects. Open and repair the comma 3X at your own risk. comma is not responsible for damages that may occur while repairing devices. We cannot provide shipping return labels for international devices.

The comma 3X does not ship with software capable of controlling a car. Open source software can be installed separately.

Windshield installation
Before using the device on your windshield, check the state and local laws and ordinances where you drive. Some state laws prohibit or restrict the placement of objects on the windshield of a motor vehicle. IT IS THE USER'S RESPONSIBILITY TO MOUNT THE DEVICE IN COMPLIANCE WITH ALL APPLICABLE LAWS AND ORDINANCES. Always mount your device in a location that does not obstruct the driver's view of the road. comma does not assume any responsibility for any fines, penalties, or damages that may be incurred as a result of any state or local law or ordinance relating to the use of your comma device.

comma 3X FAQ

How and where do I buy a comma device?

The comma shop is the only official retailer of comma devices (the comma two, comma three, and comma 3X). The comma shop accepts all major credit cards. We offer free shipping in the US and $30 flat rate international shipping.

Buy the comma 3X here.

I ordered a comma device! Now what?

Congratulations! Get started by watching the Installation Guide on our setup page. We find on average the installation process takes 15-30 minutes.

If you encounter an issue, we recommend you join our Discord community where hundreds of active users are available to help troubleshoot.

You can cancel your order for a full refund up until it ships through your order page.

Does installing a comma device require permanent modifications to the car?

Installing a comma device does not require any permanent modifications to your car. With the car harness, most car trims remain in place.

How do I mount my comma device?

We recommend the mount be centered on the windshield below the trim (see pictures in the Installation Guide). Be sure to leave enough room to remove the trim in the future. First, clean the windshield with the included alcohol wipe. Ensure the top of the mount is fully visible from the driver’s seat. Adhere mount: peel off the 3M tape’s cover on the mount. Press firmly in the center of the mount, then the edges to ensure no bubbles form.

Let the mount cure: the mount must cure for 48 hours before installing the comma device. Skipping this step will compromise the integrity of the mount.

The 3X mount may be difficult to slide onto the device before it’s installed on the windshield. This is expected and will be easier to do once the mount is installed and fully cured. Some force may be necessary to initially slide the device on the mount. Before applying any force, ensure the device mount is parallel to the mount on the windshield so it will slide in correctly.


Will installing a comma device void my warranty?

From the FTC website: "Simply using an aftermarket or recycled part does not void your warranty. The Magnuson-Moss Warranty Act makes it illegal for companies to void your warranty or deny coverage under the warranty simply because you used an aftermarket or recycled part."


Will my insurance cover my car with a comma device installed?

Contact your insurance provider directly; insurance coverage is between the user and their insurance provider. comma hardware users have been able to get coverage and discuss this on Reddit here.

Insurance companies are beginning to understand the safety benefits of ADAS and LKAS systems like openpilot and we have not heard of any providers rejecting coverage to comma hardware users.

I am upgrading from a comma two to a comma 3/3X do I need to order another harness?

No, existing comma harnesses work with these devices.

Money-back trial FAQ

What is the 30-day money-back trial?

Every vehicle is a little different and the experience can be hard to describe which is why we offer this trial. If you don’t love the comma 3X, you can return it for a full refund–no questions asked.

Our comma shop return policy applies: you have 30 calendar days to return the 3X from the date you received it. We offer return labels for $9.99 which will be deducted from your return (US only). All refunds must be initiated through comma.ai/returns

Do I have to pay for the comma 3X first before I try it?

Yes, we do not offer free trials. If you decide to return your comma 3X, you will be refunded the full cost of the unit (minus $9.99 if you use a comma return shipping label).

If you finance a comma 3X through Affirm checkout and wish to return within 30 days, Affirm will refund your installments, minus any applicable interest fees, after your comma 3X is shipped back and the return is processed by comma.

When does the 30-day money-back trial start?

The 30-day money-back trial starts the day your comma 3X is delivered. (Signature confirmation required for delivery.) If you do decide to return your device, we ask that you get the return device in the mail within 30 days of receiving it.

How do I return my comma 3X?

To return your device, please request a refund at: comma.ai/returns. A return label (or return instructions if not in the US) will be automatically sent to you.

Are international orders eligible for the trial?

Yes. We ask that you get your return device in the mail within 30 days of receiving it.

The buyer is responsible for international shipping costs to return a device for trial returns (and warranty returns). Please use tracking and insurance as we are not responsible for lost or stolen packages. Return information is provided by email after initiating a return at comma.ai/returns.