The discount is inside the link.
You do not need to copy a coupon. Open the link and confirm the discount in comma's shop before you pay.
Checked September 3, 2026
comma 4 discount link for 2026
This link opens comma's shop and gives a qualifying new customer $50 off.
Referral disclosure: you get $50 off. CommaGuide gets $50 after a qualifying purchase. New customers and comma's terms apply.
Who qualifies?
comma says the offer is for new customers. A cancelled, returned, refunded, or self-referred order does not qualify.
Read comma's termsBefore checkout
Make sure your car works.
Check the exact year, trim, region, and factory equipment. Then select that car in comma's shop so you get the correct harness.
After delivery
Choose software while parked.
comma four ships without software that can control a car. Install stock openpilot or choose a community fork that fits your car and goals.
Ready to use the link?
Prefer the coupon answer? Read the 2026 discount code guide.
Photos: comma.ai. CommaGuide is an independent guide and is not affiliated with comma.ai.
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