Wisconsin's Motorized Wheelchair Lemon Law
http://www.dhfs.state.wi.us/disabilities/Physical/lemonlaw.htm

If you buy or lease a new motorized wheelchair or scooter for use by persons with disabilities, under state law you have protection if the chair or scooter has chronic defects. Section 134.87 of Wisconsin statutes is known as the Wheelchair Lemon Law. It entitles the owner of a chair or scooter that meets the statutory definition of a "lemon" to a refund or a replacement.