The 2011 Explorer must have the worst electronics of any vehicle in history.
I bought mine in April 2011.
After a few weeks, the audio system was a mess.
The speakers would cut out intermittently.
It eventually got to the point that there was almost no sound on the left side.
After a spending nearly a year of regular visits to the dealer, Ford finally replaced the wiring on the left side of the vehicle.
but now the left side has muffled sound, and there is an occasional humming sound in the speakers on the right side.
Now the dealer refuses to deal with the problem, and customer service at Ford says there is nothing they can do.
Last Ford for me.