How to replace harmonic balancer on a 04 Mazda 6?

To replace the harmonic balancer on a 2004 Mazda 6, first, disconnect the negative battery cable and remove the drive belts. Then, remove any components obstructing access to the harmonic balancer, such as the crankshaft pulley. Use a puller tool to carefully detach the old balancer from the crankshaft. Finally, install the new harmonic balancer, ensuring it's properly aligned, and reassemble all components before reconnecting the battery.