Mine broke a while back. What happened was the nut that holds the linkage to the motor shaft came off.

I found a place online that sells the motor for a little over 100. I would take apart the assembly and if the linkage is all ok then just replace the motor yourself. From what I have seen with these monowipers everyone wants to replace the entire system when just one part is broken.

I will try to find the link of the place with the motor and post it.