The comma 4 buying question
comma four runs standard openpilot without Chestnut. The extra hardware is an optional choice for a larger driving model.
Choose for your needs
Standard setup
Start here if you want standard openpilot on a supported car with fewer hardware pieces to install.
Optional upgrade
Consider this if you specifically want the larger-model setup and are comfortable installing the extra hardware.
Our beginner recommendation
Check your car, learn what openpilot can control, and read the standard setup guide. Then decide whether a larger-model upgrade matters to you.
Do not choose Chestnut as a workaround for an unsupported car or as a promise of self-driving.
Start with the beginner checklist
Yes. It runs standard openpilot on the device. Chestnut supplies additional external computing capacity for the larger-model path.
No. Model size alone is not a guarantee for every road or situation. You remain responsible for supervising and taking over.
Check the current comma four and Chestnut store pages. Confirm harnesses, included parts, shipping, taxes, and the difference between dock-only and complete-kit options.
Car checked? Ready to choose?
Check the exact car requirements first. Then see the current comma four offer and the correct harness at comma.ai.
Referral disclosure: eligible new customers get $50 off. CommaGuide gets $50 after a qualifying purchase. Terms apply.
Your next step
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