Vehicles
Vehicles means passenger cars and trucks, buses, and multipurpose passenger vehicles with a GVWR of 3,855 kg or less and an unloaded vehicle weight of 2,495 kg or less manufactured for sale in the United States whose production of motor vehicles for sale in the United States is equal to or greater than 5,000 vehicles in a production year, and does not mean walk-in vans, vehicles designed to be sold exclusively to the U.S. Postal Service, vehicles manufactured in two or more stages, and vehicles that are altered after previously having been certified in accordance with part 567 of this chapter.