A decade-old Prius steering API enabled openpilot

A steering API built for a minor Toyota nudge feature later let more than 1,000 old Priuses run open-source driver-assistance software

There's 1000+ Toyota Prius out there running openpilot. Many of them 10 years old. Toyota engineers made a steering API for a useless nudge feature nobody wanted. Little did they know this enabled the cars to come to life years later with
Ranked #6 on backlist 2026-05-18 (18 May 2026 UTC) · by (Harald Schäfer) ·

How it ranks: Backlist reads my Twitter/X timeline, scores every tweet for substance with an LLM rubric (not engagement), and publishes the daily top picks with a one-line takeaway. Curated by Surya Dantuluri.