There are other modules in the vehicle that keep track of mileage besides the cluster so it is important that you swap the the old cluster with the replacement cluster with the mileage being synced as close as possible so that all of these modules contain the same accurate mileage . If you can’t do this, it’s important to perform the swap before you reach the programmed mileage of the replacement cluster so that you’re not rolling-back the mileage of the vehicle which is illegal.
