How do you change spark plugs in a 2003 x5 BMW?

To change the spark plugs in a 2003 BMW X5, first, ensure the engine is cool and disconnect the battery. Remove the engine cover and locate the spark plug wires or coils. Unscrew and carefully pull out the old spark plugs using a spark plug socket and ratchet, and then insert the new spark plugs, tightening them to the specified torque. Finally, reconnect the spark plug wires or coils, replace the engine cover, and reconnect the battery.