Consider using a combination of heat and penetrating oil to loosen it up if it's seized. Easy out is the tool to use, but they also have a tendency to expand the plug as they dig in which can work against you. If you can help free it up with some GOOD penetrating oil (fluid film or something, not WD40) the easy out will work better. Good luck!
2004 Imola BMW ZHP
2006 Commander Limited Hemi QD2
"Bought, Not Built"