You changed instrument cluster now odometer dos not work?

If the odometer isn't working after changing the instrument cluster, it may be due to a few reasons. First, ensure that the new cluster is compatible with your vehicle's make and model. Additionally, check the connections and wiring harness to make sure everything is properly connected. Lastly, some vehicles require a reprogramming of the new cluster to sync it with the vehicle's systems for the odometer to function correctly.