Product review (4 stars): Works For Me
I didn't realize the potentiometer on my VitaMix was faulty when I bought it many years ago.  Delighted I found this replacement part and my VitaMix is now working properly.  There's an excellent YouTube video on how to replace it, but the wires in the video are different from this particular replacement part.  I had to use "common sense" when reassembling.  Otherwise, it works perfectly.