Do you know which version of the Precor 9.21 you have? There are a few different versions you
can view here. Click on your version to view the parts list and look for "Cover, Motor" or "Motor Cover".For instance, if you have the 9.21 (AYYZ), the proper motor cover is
this part #5019749However,
this part #5005569 is listed as the proper motor cover for the 9.21 (F5), 9.21i (2X), 9.21s (F6), 9.21si (2Y), and a couple others. Make sure you have matched up your exact model number with the motor cover you need so do you not order the wrong part.