An odometer is a device used in vehicles to measure the distance traveled. It is typically found on the dashboard and displays the total miles or kilometers driven. Odometers can be mechanical or digital, with modern vehicles often using electronic systems for accuracy. In addition to tracking distance, odometers can help determine when maintenance is needed, such as oil changes or tire rotations. Some vehicles also have a trip odometer, which can be reset to measure the distance of individual journeys. Accurate readings are essential for vehicle resale value and maintenance scheduling.