There is no useful single lifespan number for every robot mower. A mower is a collection of replaceable and non-replaceable systems, and long-term value depends heavily on parts availability, battery service, weather exposure, and manufacturer support.
What actually drives the answer
The chassis can outlast several wear components if the battery, blades, wheels, motors, seals, and charging hardware remain serviceable. That makes parts support at least as important as the original specification sheet.
Where buyers get tripped up
A technically functional mower can become uneconomic if a proprietary electronic module, wheel motor, or battery is unavailable. Newer brands may offer strong specifications but have less evidence about long-term parts continuity.
How to make the decision
Treat serviceability as a purchase criterion. Prefer products with clear warranty terms, published replacement parts, documented winter storage, and a support path that does not require shipping a heavy machine internationally.
How we research robot mowers
We normalize manufacturer specifications around the buying constraints that actually change the decision: recommended mowing area, navigation architecture, slope capability, cutting-height range, obstacle sensing, charging behavior, multi-zone support, warranty, parts availability, and current pricing. We give more weight to property fit than to feature count.
Prices, specifications, firmware, and configuration-driven features can change. Check the current manufacturer page and local requirements before buying or installing equipment.