-I've heard of the timing issues, but doesn't seem extremely prevalent
-The intakes are a huge issue, but I've done nothing except run 93 and Mobil 1 oil, and occasionally run the car HARD, and the build up has actually decreased significantly.
-Not sure what you're talking about with the MAF, as the 3.5's have no MAF, they have a MAP, and I've never heard of any issues with it.
-Also the battery issues are a new one
Issues that I've heard and run across
-PTU (transfer case) blowing up, but primarily pre-2014. A way to stave off failures is to make sure the tires are always within 1/32nd of each other.
-Premature turbo failures (but this has been pretty overblown, a few people definitely had premature failures, but more often than not both turbo's failed at once, or within a month or so, which leads me to believe something environmental or maintenance related. The turbo's are actually different in that one spins clockwise and the other counter clockwise which SHOULD rule out manufacturing.) Seems most fail around the 120K mark. I'm working on 130K on my stock units, and haven't seen any issues or redflags.
-Spark plugs, if they haven't been changed, it's the first thing that should be done. They came from the factory with terribly gapped plugs...when I pulled mine, the gaps were anywhere between .29 and .4
-Brakes - shouldn't be an issue with a PI or SHO, but poor brake feel and bad ABS/hydraulic units seem to be sporadic, but not uncommon.
-CO contamination -
https://www.cbsnews.com/news/ford-e...new-recall-demand-carbon-monoxide-complaints/