A wheeled vehicle or rolling stock; commonly refers to railroad cars (coaches, freight cars) or vehicles with wheels.
電車の車両は全部で8両あります。
There are eight cars in the train.
事故で数両の車両が脱線した。
Several train cars derailed in the accident.
工場では新しい車両の整備が行われている。
New rolling stock is being serviced at the factory.