Who this is for
Mechanically confident Prius owners tired of weak steering and ping-pong in corners.
FrogPilotHardware and wiringAdvanced
Toyota Prius steering motor swap for stronger steering
Swap in part 89650-47600 or 47800 with a 3D-printed cogwheel; it replaces the older steering sensor mod.
You need
- A 2021 or 2022 Prius steering motor
- A 3D-printed cogwheel and a socket set
- A bungee cord and a breaker bar
In plain words
Why this guide matters
Older Prius models steer weakly with openpilot and wander in corners. Owners fix this by fitting the steering motor from a 2021 or 2022 Prius, part 89650-47600 or 47800, with a printed cogwheel. This FrogPilot wiki page collects the parts, the video and the settings that worked.
The short version
What the full guide walks you through
Disconnect the 12 V battery and wait five minutes for the airbags.
Remove the old steering motor per Erich's video.
Fit the new motor with the printed cogwheel.
Reassemble, then apply the recommended settings.
Before you start
- Airbag risk if you skip the battery step.
- Air ducts and bolts are fragile or very tight.
- Community write-up, not a workshop manual.
The full wiki page belongs to FrogPilot. Checked on September 10, 2026. Their last update was September 24, 2025.
Quick answers
Questions people ask
Which Prius years benefit?
The write-up is for Prius owners with the earlier steering motor; the donor part comes from a 2021 or 2022 car.
Is this safe to do myself?
Only if you are handy; disconnect the 12 V battery and wait five minutes so the airbags are safe. Bolts are very tight.
Will steering feel perfect afterwards?
No; the author says comma's and Toyota's limits still apply. Expect stronger steering and less ping-pong, not perfection.
Check your car
Cars this guide talks about
Support changes by year and trim. Open your exact car before you buy anything.
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Check your exact car first, then choose software and hardware.
Photos: comma.ai. Guide content belongs to FrogPilot. CommaGuide is an independent guide and is not affiliated with comma.ai or FrogPilot.
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