The noise generally occurs when I'm stopped at a light and it sounds and feels like the pump is struggling, it also goes away if I slide it into neutral and is louder when I'm in reverse. It's a mix of buzzing and vibrating (kinda like when u first turn on the AC). I think it may have something to do with the self leveling susp. I park on a hill sideways on a slanted angle so the right side is always a little high than the left and I'm thinking the sensor gets confused whether and can not determine if the X5 is level because of the downhill slant I park on. Hopefully this is the problem, I will try to lark on a flat surface tonight. Thanks for the input guys !