re electronic odometers was used bmw question in article dirac physics purdue edu lovall bohr physics purdue edu daniel l lovall writes it shouldn t be that hard if you know much about digital electronics if the counter is made with standard ttl chips all you should need to do is find the chip s used for counting figure out what mileage you want to put in and preset it but wiring the preset pins directly to low high you d also have to know what the conventions are for low and high it might be a little more involved than this but it shouldn t be beyond someone with a bsee or bs eet all the display does is convert what the counter chips say into digits using a translation table stored in rom nobody is using discrete ic s to do these functions anymore if at all i doubt any of the motor electronics had any to start with much less ttl i can almost guarantee that it ll a fruitless attempt to figure out how bmw does it without breaking anything and invalidating any warranty on the car if you re lucky you d still be able to start the car
