comma two – comma 3/3X

Upgrade from comma two to comma 3X

10 steps
15 min
comma 3X
from $1250
  • comma 3X
  • right-angle OBD-C cable (1.5 ft)
  • 2 mounts
Frequently asked questions

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.

How long will my device have software support?

Although there's no official support for any software, it is comma's policy to continue providing software updates to hardware for 1 year after it is the latest generation sold.

Join the conversation

Have a question or want to learn more? There are thousands of knowledgeable community members on the Discord.


Developer Resources

Check out the code behind the the comma 3X and openpilot. Review, fork, and contribute to the open source ecosystem.