a system and method of calibrating a vehicle odometer includes a controller receiving signals from the odometer indicative of movement of the vehicle and a receiver indicative of distance traveled . the controller obtains information indicative of movement of the vehicle in response to travel at a constant speed . the receiver provides signals indicative of the distance traveled to the controller . the controller determines an average number of signals relative to distance and compares the average number to a current number of signals relative to distance . odometer calibration updates if the average and current number of signals relative to distance differs by a predetermined amount . the number of signals relative to the distance is only recorded when the vehicle is traveling at a constant speed , eliminating aberrant data from odometer calibration .