Unless a consumer expressly waives in writing the right to have removed parts returned to him or her, all such parts shall be returned, except such parts as the service dealer requires for return to the manufacturer or distributor under a warranty arrangement and except where the part:
(a) is replaced under a service contract or maintenance agreement for a fixed fee and for a specified time, and where no additional charge is made to the consumer for repairs; or
(b) can be rebuilt and the dealer purchases it from the consumer for that purpose and indicates the credited value in the written estimate; and
(c) is considered by the dealer to be unsafe in which case he or she shall so inform the consumer and give the consumer the option of whether or not to accept the returned part.