Turn off the car's ignition. Hold down the reset button on the dash board to zero the mileage. keep it held in. turn the car's ignition on - but do not start. keep the button in for 5 seconds. a menu will come up - like date/mileage. let go and then press the button again. it will toggle through some options - then get to 'rst' press the button again, and your done

I hope this helps you,and have a merry x mas