Yes, the latches on the data connector broke, so it comes loose if I don't secure it some other way. A rubber band works. I have a spare connector, but I'm not sure my soldering skills are up to the assembly task. My main concerns are with the charger. I have three chargers, but only one actually works properly. I have a spare system, and the controller on that one requires a lot of force on the power button to turn on. The rear wheel comes out of true about once a year, but other than that, everything works well. Mine is a 750 watt system.