How to install comma Chestnut

Use the stable release on comma four. Install the hardware first. Then enter the checked URL while parked.

Copy the install URL Read the full guide
Chestnut and Radeon GPU mounted in a passenger footwell
Official Chestnut imagecomma.ai

Stable software

Chestnut install URL

Enter this on the Custom Software screen on comma four. Do not open it in a phone or computer browser.

Stable Chestnut installerinstaller.comma.ai/commaai/release-chestnutOfficial stable channel: release-chestnut

Park first

Five setup steps

  1. Mount the kit

    Secure the RX 9060 in Chestnut. Mount the kit where its fans stay clear.

  2. Connect power and USB

    Connect the included vehicle power cable and the long USB cable to comma four.

  3. Remove the current software

    If openpilot is installed, remove it from Settings. Return to the setup screen.

  4. Enter the Chestnut URL

    Choose Custom Software and enter installer.comma.ai/commaai/release-chestnut.

  5. Finish while parked

    Let setup finish while parked. The release detects the Chestnut hardware.

Before you start

  • Use comma four. That is the official in-car target.
  • Use the non-XT Radeon RX 9060 supplied with the kit.
  • Keep the graphics-card fans clear.

After setup

The Chestnut release detects the hardware and loads its driving model. Updating through the supported software channel is how you receive its model changes; you do not choose a model by its parameter count. Keep supervising every drive.

The Chestnut icon is green when ready or working. Pulsing white means its model is loading. Orange means there is a problem. Read the accompanying notification if it turns orange.

Understand the latest Chestnut model updateRead the plain-language explanation and technical details for openpilot 0.11.2.

Chestnut guides

Photos: comma.ai. CommaGuide is an independent guide and is not affiliated with comma.ai.

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