This is one of the weirdest problems I had yet with this car. There is an audible humming noise coming from the rear of the car. I've not clue what it is. Its only audible when the car is not moving (parked, stop light, etc.). Only weird thing I notice that happened was the car started off rough, kind of like the rpm bouncing a little bit and was going to stall, but it did not. After that it started up normal, yet now there is a sound. Any clue what it could possibly be? Car seems to be driving like usual.