Mich. Comp. Laws § 445.1084

Sec. 4. (1) To receive a wheelchair of comparable quality, size, and function or a refund, a consumer of a purchased wheelchair shall first offer to the manufacturer of the wheelchair having the nonconformity the transfer of that wheelchair to the manufacturer. (2) Not later than 30 business days after the offer described in subsection (1), the manufacturer shall provide the consumer with a wheelchair of comparable quality, size, and function or a refund. (3) When the manufacturer provides the wheelchair or refund, the consumer shall return the wheelchair having the nonconformity to the manufacturer, along with any endorsements necessary to transfer possession to the manufacturer.