Taking away someone else’s vehicle(s), like a scooty, car, cycle, etc. without their consent is considered as theft(( Section 378, Indian Penal Code, 1860; New India Assurance Co. Ltd v. Appliance Technologies India.)). For example, if Ram has parked his car, and Sham takes it away, it will be considered as theft.
This is punishable with jail time of up to 3 years and/or a fine(( Section 379, Indian Penal Code, 1860.)). If your vehicle has been stolen, read here to understand the steps/options you can take to complain.