I purchased my 2016 SV about 4 weeks ago. The clicking noise started about a week ago. After reading the service bulletin that addresses this issue, I called my local Nissan dealer and spoke with the service manager. He knew exactly what I was talking about, and that the remedy is what was detailed in the service bulletin.
I had the repair done yesterday, it took about 90 minutes, and set me back $150. The service manager told me that, while it’s annoying (which it WAS), it’s unlikely that that there would be any damage caused by not fixing it.
I am now enjoying only the gentle whirr of the motor, the way the EV gods intended.