Hello,
My wife and I just recently purchased a new 2017 Explorer Sport after trading in our 2010 Limited Explorer because of multiple mechanical problems. As luck will have it we are having problems with the power liftgate not opening and this is being fixed under warranty. The bigger issue I have is that there is a constant high pitch buzzing sound coming from the interior and its on only when the ignition is on. Once the vehicle is turned off and there is still power running to the stereo and electronics the noise stops. I also turned the stereo power off with the ignition on and the noise is still there. I can't really isolate the sound to a specific area as it seems to resonate throughout the inside of the vehicle.
I work at the Ford dealership that I bought the vehicle from and they said that this is a "normal" sound these vehicles make. Sure enough I went into 2 other brand new 2017 explorer sports on the lot and once I started them they would make this noise as well. They did sound a bit more faint but still there none the less. I emailed Ford customer service and just received a generic response of go to your service department to have this looked at. The best guess that one of the service technicians had was that it is from the fuel pump but they won't replace it as there is not any mechanical issues with it.
I wanted to see if there are other people who are experiencing this problem. It is a very irritating sound and after paying a lot of money for a new vehicle I don't expect to have this kind of issue to deal with. I am hoping that I can identify the source of this noise and if it is common in other Explorer's then Ford can be made aware of it and issue a TSB.
Thanks for your help!
Mark