Does anyone think that Bosch are reconditioning the returned motors and selling them on as new with new external cases.
Xerox two decades ago had a business model whereby they stripped down all returned printers, .. this would for example have included paint removal on panels, and them rebuilt them. Any defective parts or parts subject to wear and fatigue e.g springs, cogs , bearings would be discarded but other items including motor coils, printed circuit boards , shafts would be inspected with the same kit as new product and introduced into the production cycle.
So my answer is why not.
If they are licencees of software from a third party, then they can avail of rebates for any items not sold on. Once a motor has been received by them, that rebate would be applicable.