Product review (5 stars): Make sure the motor is all you need.
The new motor is an exact fit and better than the old one. It deserves a five star rating. But when replacing it, I found so much more wrong with my humidifier that I would have replaced it entirely had I known. The stalled motor caused damage to the printed circuit board, so I had to repair that. The housing plastic has gotten very brittle, so some parts were breaking off as I worked on it. The screws were horribly corroded, and not all of them are a common size, so replacing them proved difficult. Water passages, both in and out, were very gunked up with mineral deposits. Housing warpage caused the electrical connector not to mate when the cover was in place, so I had to re-wire the connector around the outside of the housing.  You DO need to recover the cork mounting bushing from the old motor or buy a new one.  It's nice to have the option of replacing just the motor, but it may be a bigger project than you thought.