car harness

car harness

Connect to your car
Free US shipping, $30 flat rate internationally.
Harness compatibility based on the US car market.

The car harness is our universal interface to your car. Use the car harness to connect your comma device to your vehicle.

We designed it to be invisible in your car while being easy to install and use. Car harness enables ECU fingerprinting and seamlessly switches back to the stock system when unplugging your comma device.

  • Stealth install; car parts remain in place, no messy cables
  • Easy to set up; watch us do it in 3 minutes here
  • Advanced relay technology prevents faults and warning lights when unplugging your comma device
What's in the box?

The car harness ships with car-specific parts. Each kit includes the different parts required to connect a comma three to the specified car.

For most cars, the car harness includes:

  • 1 harness box
  • 1 harness connector
  • 1 comma power v2
  • 1 RJ45 cable (7 ft)
Does not include an OBD-C cable, sold separately.
Developer Notes
  • Auto shutoff to protect your car battery
  • Easy to develop new car ports; just make a new connector
  • OBD-C is the standard port for comma hardware
  • For harness without a connector on the car side, choose "Developer Harness"