I don't know why you would say that, my Xiaomi s6's wheel motor died, I was bummed about it. I ordered a replacement motor, and to my surprise, I only had to open one or two screws and the motor module popped right out. The module had a nice slitting connector. I put the new motor back in and I was done. The thing must be at least 8 years old by now and it's still chugging along. I now passed it on to my parents and it's cleaning their house.