When does the factory warranty start on autos?

The factory warranty on automobiles typically begins on the date of the vehicle's first retail sale or lease. This means that the warranty coverage starts when the vehicle is purchased by the first owner from a dealership. In some cases, if the car is used as a demonstrator or rental vehicle, the warranty may start from the date it was first put into service. Always check the specific terms and conditions of the warranty for details, as they can vary by manufacturer.