My wife and I are looking at replacing her 05 liberty with an 06 explorer. Well I was just in the explorer forum and found a thread talking about the same two-piece plug design and breakage issues that us with our 5.4s have had to deal with. Well, I thought I had read in this forum that the 4.6L didn't have this problem. Did they put a different version of the 4.6 in the explorer than the f-150? I guess I need to know this so if it is a problem I can try to negotiate the plug change as part of the trade(it has 82,000). Thanks guys for any answers.