Review on Roborock S50 S51 S55 Lidar Motor Power Vacuum Cleaner Accessories: Premium Metal LDS Mini Replacement Parts with Cable for Effective Distance Sensing by Kris Wagner

Matches my S50 perfectly. You just need to know where to carefully place the coiled wires in the grooves. The unit came with an orange pulley mounted next to the motor; So for my S50 device I had to pull it just enough to fit right onto the spinning rod to allow the orange rubber band to attach straight/tightly to it. Did a zone and full clean shortly after install and everything worked as described. No more error messages 1 LDS. Time will tell how long this engine lasts. I assume it will take maybe a year or two. When that time comes, or if it breaks sooner than expected, I would consider updating this review.