Nothin has gone wrong with this car yet.
I went on a 1,500 trip and back in December 2001 and it drives excellent, very comfortable and I recommend it to anyone.
Have you ever heard of any type of intermittent humming noise located somewhere near the fuel door after turning off the engine? I have, is this normal?
Yes the humming is normal. I have it on mine. Also had it on my 4Runner. Not to worry. The 4Runner lasted 7 years and 180,000 miles and no fuel related problems. Really not any problems at all.
The humming is the fuel pump.