Is it necessary to change both expansion valves on a 03 sonda with dual ac?

Yes, it is generally advisable to change both expansion valves on a 2003 Honda Odyssey with dual AC systems when performing repairs. This ensures balanced refrigerant flow and optimal performance across both zones. Replacing both valves can also prevent future issues, as one failing valve can strain the entire system. Additionally, it helps maintain consistent cooling efficiency throughout the vehicle.