How do change spark plugs on a BMW x5 2006?

To change the spark plugs on a 2006 BMW X5, start by disconnecting the negative battery terminal for safety. Remove the engine cover and the ignition coil connectors, then unbolt and remove the ignition coils to access the spark plugs. Use a spark plug socket to carefully unscrew the old plugs, then install the new ones with the correct torque specifications. Reassemble everything by reversing the removal process and reconnect the battery.