Stihl Robotic Mower Review
Stihl has entered the robotic mower market with a lineup designed for precision, durability, and quiet operation. This review breaks down the key models, their real-world performance based on owner feedback, and how they stack up against competitors.
Quick answer
The Stihl iMow 632.1 is the best overall pick for medium to large lawns, offering robust cutting performance, reliable boundary wire navigation, and excellent build quality. For smaller yards, the Stihl iMow 422.1 provides a more affordable entry point without sacrificing core features.
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Research updated June 2026.
Stihl iMow 632.1
Reliable navigation and strong build for medium to large lawns.
| Specification | Value |
|---|---|
| Recommended Lawn Area | Up to 0.75 acres |
| Cutting Width | 8.3 inches |
| Cutting Height Range | 0.8 - 2.4 inches |
| Battery Type | Lithium-Ion 18 Ah |
| Max Slope Capability | 45% |
| Weight | 24.3 lbs |
| Noise Level | 58 dB(A) |
Pros
- Quiet operation at 58 dB
- Handles slopes up to 45%
- Sturdy, weather-resistant chassis
Cons
- Requires boundary wire installation
- Higher price than some competitors
Who is the Stihl iMow 632.1 For?
The Stihl iMow 632.1 is designed for homeowners with medium to large lawns who want a reliable, set-and-forget mowing solution. It is best suited for yards with moderate slopes and complex layouts, as its advanced navigation system handles obstacles and tight corners well. Owners who prioritize build quality and brand reputation will appreciate Stihl's construction standards.
Performance and Cutting Quality
Owner reviews consistently highlight the iMow 632.1's consistent cut quality. The floating cutting deck follows ground contours, preventing scalping on uneven terrain. The mower uses a random navigation pattern that ensures full coverage over time, though some users note it may take longer than systematic patterns on very large lawns. The 18 Ah battery provides enough runtime for the rated lawn size, and the automatic charging station returns the mower when power is low.
Build Quality and Durability
Stihl is known for robust outdoor equipment, and the iMow series continues that reputation. The chassis is made from impact-resistant plastic, and the wheels provide good traction on wet grass. The cutting blades are durable and easy to replace. The unit includes a rain sensor that returns the mower to its charging station, protecting electronics from moisture. Owners report few issues with long-term reliability, though the boundary wire can be damaged by garden tools or animals.
Alternatives to Consider
For smaller lawns under 0.25 acres, the Stihl iMow 422.1 offers a more budget-friendly option with similar features. If you prefer a mower without boundary wires, the Husqvarna Automower 430X uses GPS navigation but costs more. The Worx Landroid L is a strong competitor for similar lawn sizes at a lower price point, though build quality is generally rated lower than Stihl.
FAQs
How long does the Stihl iMow 632.1 battery last?
The 18 Ah lithium-ion battery provides up to 75 minutes of runtime, which is sufficient for the rated 0.75 acre lawn.
Does the Stihl iMow work on hills?
Yes, it can handle slopes up to 45%, making it suitable for most residential yards with inclines.
Is the Stihl iMow 632.1 quiet?
At 58 dB(A), it is quieter than a standard conversation and will not disturb neighbors.
Do I need to install a boundary wire?
Yes, the iMow 632.1 requires a perimeter wire to define the mowing area, which takes a few hours to install.
Can the Stihl iMow handle wet grass?
The rain sensor returns the mower to its base when rain is detected, so it is best to avoid mowing wet grass.
How often do I need to replace the blades?
Blades typically last 2-3 months depending on usage and terrain, and they are easy to replace.
Does the Stihl iMow come with a warranty?
Yes, Stihl offers a 3-year warranty for residential use, covering manufacturing defects.
Can I schedule mowing times?
Yes, the mower supports scheduling via the control panel or optional app, allowing you to set daily mowing times.
What happens if the mower gets stuck?
The iMow has lift and tilt sensors that stop the blades and alert you if it gets stuck or tipped over.
Is the Stihl iMow compatible with smart home systems?
It does not directly integrate with smart home systems, but the optional app provides remote control and status updates.
Our verdict
The Stihl iMow 632.1 is the best overall robotic mower for medium to large lawns, offering reliable performance, excellent build quality, and quiet operation. For smaller budgets, the Stihl iMow 422.1 is a solid alternative that maintains the same core reliability.