[yetibone]

I've had 7 plugs break off in a 2005 with 174k on the factory plugs before. Each broken plug adds an hour to the job, and sure, it's a pain to fix, but I've never had to behead a modular Ford for sake of a broken spark plug, or wrecked threads. Sometimes, small pieces of the ceramic insulator will end up in the cylinder, and that will make some noise upon start up, however it passes out the exhaust valve in less than a minute, and does no damage. Larger pieces, or the center electrode dropping in would call for some other measures.

Extraction tools are available from lots of suppliers these days. I got mine from Lisle about 8 years ago, and it's always done the job well.

My trick is get it hot, pull the coils, hose each hole down with PB Blaster, and take them out in the morning with a 3/8" impact, and a deep 9/16 socket.

Autolite makes a plug now that addresses this problem. Time will tell if they are really effective in coming out in one piece.