BLUF: My Segway Navimow is now running Navimow OS V4.3.0 along with updated ACU, ECU, Vehicle Control, Charging Station and Vision Core firmware. Based on reports from other owners, V4.3.0 appears to have begun rolling out around July 30–31, 2026, with the rollout continuing into August. The timing is particularly interesting because I have also been documenting recurring RTK boundary problems on one side of my property.
Navimow OS V4.3.0 Is Installed
I checked the Software Update screen in the Navimow app and confirmed that my mower is currently running Navimow OS V4.3.0.
The individual firmware versions currently installed on my system are:
- Navimow OS: V4.3.0
- ACU firmware: V1.0.6.1
- ECU firmware: V1.0.4.4
- Vehicle Control firmware: V1.0.2.6
- Charging Station firmware: V1.0.1.2
- Vision Core firmware: V1.0.0.2
I have included my own screenshot of the Software Update screen because firmware rollouts can vary between models, regions and individual machines.
When Did Navimow OS V4.3.0 Arrive?
Navimow does not appear to have pushed this update to every mower simultaneously.
Based on reports from Navimow owners at the time, V4.3.0 appears to have started reaching at least some machines around July 30–31, 2026, with additional owners receiving it during the first week of August.
For that reason, I consider July 30–31 an estimated rollout date rather than an exact universal release date.
Why This Update Is Particularly Interesting to Me
The timing matters because I have been dealing with a recurring positioning problem with my Navimow.
Most of my property continues to mow correctly. My backyard and another mowing zone have operated normally. But one particular side of my house has repeatedly caused problems.
My Navimow has drifted beyond its intended boundary and into my neighbor’s lawn. It has also damaged sprinkler heads in that area.
The situation eventually reached the point where my neighbor placed bricks along the edge of his property in an attempt to keep the mower from crossing onto his grass.
I’ve Also Seen Strange Return-to-Home Behavior
During one of my earlier problem sessions, the mower successfully handled other portions of my property but appeared confused when I instructed it to return home.
That is significant because it suggests the mower itself can otherwise be functioning normally while positioning or navigation becomes unreliable in a specific location.
A Restart Previously Fixed My RTK Problem
One of the strangest things I have discovered during this testing is that the positioning problem is not always repeatable.
During my July 19 mowing session, the Navimow wandered outside its intended area and damaged two additional sprinkler heads.
I eventually sent the mower back to its charging station and let it sit for approximately 10 minutes.
I then cleared the existing mowing progress and selected Clear Progress and Start from Scratch.
When I sent the mower back out, it mowed the same troublesome area perfectly.
No remapping. No relocation of the RTK antenna. No hardware changes.
Simply restarting the mowing job was enough to restore normal behavior during that session.
Other Owners Are Reporting Positioning Problems Too
While researching the V4.3.0 rollout, I found reports from other Navimow owners describing navigation and positioning problems during the recent firmware-update period.
One particularly interesting report described a mower physically traveling into a neighbor’s yard while the Navimow app continued showing the mower positioned on the owner’s property.
Other users have described stopping, rebooting and positioning problems around recent software releases.
These reports do not prove that Navimow OS V4.3.0 causes RTK problems. Different mower models, properties, RTK configurations and environmental conditions can produce very different results.
But because I am experiencing my own recurring boundary problem, I think the reports are worth documenting and watching.
What I Am Watching After V4.3.0
Rather than declaring the update a success or failure immediately, I am going to judge it by how the mower behaves during normal use.
The things I will be watching most closely are:
- Whether the mower stays consistently inside its virtual boundaries.
- Whether the troublesome side of my house continues producing positioning errors.
- Whether it successfully returns to the charging station after completing a zone.
- Whether restarting a mowing session is still necessary when positioning becomes inaccurate.
- Whether future firmware updates improve RTK reliability.
Firmware Updates Are Different on a Robot Mower
A firmware update on a phone or computer might change an interface, fix a bug or improve performance.
On a robotic mower, software also controls a machine physically moving around your property.
Positioning errors can therefore have real consequences.
In my case, inaccurate navigation has already resulted in damaged sprinkler heads and the mower entering my neighbor’s property.
That makes firmware stability and positioning accuracy considerably more important than simply having the latest version number.
My Real-World Verdict So Far
It is still too early for me to say whether Navimow OS V4.3.0 has improved my recurring RTK problem.
The mower continues to demonstrate that it is capable of excellent navigation. Most areas of my property work correctly, and even the troublesome area can sometimes mow perfectly.
The question is consistency.
If V4.3.0 improves that consistency over the next several mowing sessions, that will be far more meaningful to me than anything written in a release note.
Final Thoughts
My Navimow is now officially running OS V4.3.0, and I have documented the individual firmware versions installed on my machine so I have a reference point for future testing.
That’s important because I am not evaluating this mower from a showroom or after using it for a weekend. I am documenting what happens after living with the technology over time.
For now, V4.3.0 gets a simple verdict: installed and being tested.
The real test will be whether my Navimow can consistently mow that troublesome side of the property without visiting my neighbor again.
