Take cover off, unscrew torx screws holding coil pack on top of plugs and lift away. You may need to loosen a connecting cable to the coil pack. Remove the plugs using a suitable socket. Insert the new plugs, care not to cross-thread them, torque them up. Resecure cable if loosened. Refit coil pack, fit securing screws, replace cover.
ChicksFan
October 2009