Navigational (global Positioning System) Gps problems of the 2014 Toyota Highlander

Gps/radio often turns off while driving. Screen completely goes blank and keeps trying to reset itself. Voice commands often don't work while driving or stationary. Blue tooth often doesn't connect while driving or stationary. Tailgate often doesn't close and takes multiple tries to get to working again when stationary. Spongy/broken spring sound coming from the rear of the car as I drove over uneven road. Rear left tail light always foggy and contains moisture even after replacing it. Chirping sound coming from right side of car when driving on highway on windy days. Wheel and car shaking while driving on highway at speed over 60 mph.

The speedometer consistently indicated that I am traveling 2 to 3 mph more than my actual speed. The Highlander is factory original with no aftermarket parts installed. This issue was observed while traveling cross country and observing the plethora of radar speed indicators along I-80 and comparing to the indicator in the Highlander along with digital indication on both gps and iphone apps. I mentioned this the Toyota while performing the first service on the vehicle. I was told that there is nothing they can do about the supposed issue. Its not a safety issues as far as I know, but it is an irritation.

Factory installed gps system when set to a destination will take you off the main road just prior to your destination and direct you in circles then tell you to get back on the main road that you just got off of. This creates an issue as one time it took us in a undesirable neighborhood; but more often than not will take you cruising in unknown neighborhood's before it tells you to get back on the main road you were just on. On other occasions it will tell you to take say a right turn then a few seconds later tell you to take a left turn causing you to erratically change lanes and make turns.