@sickburnbro @sj_zero @monsterislandcolonizer It's not always wrong, but it is certainly more complicated as you originally said. Much of the time, OEM software is required which can cost hundreds or thousands to get. (Thankfully enthusiasts generally have black or gray market versions available) My car requires a trip to the dealer to change a 25$ TPMS sensor, or I have to spend a couple hundred on an after market programmer that only works on some brands of sensors.