1. shall mean every vehicle which is self-propelled or designed for self-propulsion and every vehicle drawn by or designed to be drawn by a motor vehicle and includes every device in, upon or by which any property is or can be transported or drawn upon a highway, whether or not required to be licensed by the Commonwealth, but shall not include devices moved by human or animal power or devices used exclusively upon stationary rails or tracks. Nor shall it include those parts of a manufactured home which do not affect the ability of the manufactured home to be safely upon a highway.

2. shall include any natural person, firm, partnership, association or corporation.

3. shall mean any person who for profit diagnoses or corrects malfunctions of, or damage to, a motor vehicle.