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● Checked Nov 11, 2026From Segway Navimow support
Segway Navimow error
4105

Navimow X3 "ACU hardware error" (4105): what it means and the fix

Steps2
ToolsNone
PartsNone

Works for Navimow X3 series (X315, X330, X350 and X390).

Short answer

What it means: Segway names code 4105 on the Navimow X3 series "acu hardware error". The mower stops and shows the code in the app until it is cleared.

Quick fix: Press STOP to clear the code.

Fix it in 2 steps

  1. Press STOP to clear the code.
  2. If that fails, restart the mower.

Fixed when: The code clears and the mower resumes its task.

Still showing ACU hardware error?

The code comes back after a restart. Email Navimow support (US: [email protected]) or use Live Chat in the app, with the serial number, the date and time of the error and a video if you can. Contact Segway Navimow support. Warranty: Up to 3 years on the mower, per Navimow. Segway Navimow support →

Parts that fix this

Replacement bladesFor Navimow X3 on AmazonCheck price →Check the part fits your model. Affiliate links: we may earn a commission at no cost to you.

Other Navimow X3 errors

6106Motion planning error›3107Left wheel motor error›7106GNSS module error›6116Channel access error›2106Battery temperature too low›9110Program crash›9108Program crash›3111IMU data error›All 66 Navimow X3 codes →

Keeps happening? Compare before you replace

Segway Navimow X390$4,499 · Top X3 model with RTK and vision for lawns up to 2.5 acresCheck price on Amazon →
Segway Navimow X350$2,799 · Fast RTK and vision mower for big, open lawns up to 1.5 acresCheck price on Amazon →
Segway Navimow X390 vs Yarbo Y40 Core with Lawn Mower ProPoint by point

Sources

  1. Segway Navimow support: X3 error code 4105, ACU hardware error
  2. Segway Navimow support: Navimow X3 error code section
Replacement blades for Navimow X3Part on AmazonCheck price →