For the class action lawsuit
Summarizing the argument on behalf of owners impacted after evaluating posts from both subreddits.
Mammotion marketed and sold premium robotic lawn mowers as integrated hardware-and-software products capable of precise autonomous navigation, reliable boundary control, configurable mowing patterns, automatic charging and resumption, obstacle recognition, and lawn-friendly operation. Mammotion’s own documentation represented that Multi-Point Turn reduced grass wear, while zero-turn operation could cause grass wear.
After consumers purchased the products, Mammotion retained unilateral control over the mobile application, firmware, server functions, task-setting formats, and compatibility with older software. Through an August 2026 app and firmware rollout, Mammotion removed or disabled Multi-Point Turn without clearly disclosing that removal in the contemporaneous app release notes. Mammotion subsequently admitted both that the feature had been removed and that owners should have been informed beforehand.
Consumers could not reasonably preserve the functionality for which they had paid because the application and supported firmware were integral to configuring and operating the physical mower, older versions were not assured continued operation, and Mammotion offered no generally available supported rollback. The change forced affected products into different turn behavior, diminished their utility and value, and allegedly caused foreseeable lawn damage and loss of use.
Corrective releases then allegedly introduced or failed to cure model-specific navigation, boundary, blade-control, docking, and obstacle-detection problems. Mammotion’s later announcements expressly identified blade stopping, missed grass, boundary crossing, and grass damage as conditions its subsequent updates were designed to reduce.
Mammotion therefore did more than sell a product that later developed an ordinary defect. It allegedly created a post-sale nonconformity in a purchased physical product, failed to disclose a material feature removal adequately, deprived consumers of a practical way to avoid or reverse that removal, and failed to provide a prompt repair, replacement, equivalent safe functionality, or refund.