Hi All, Just picked up a 2007 Aurion AT-X yesterday, awesome car! Previous car was a Mazda 6, probably nicer to drive but the Aurion is infinitely more powerful. Anyway, I have noticed that when driving there is a humming noise coming from the rear of the car. It sounds a bit 'woofy' if that makes send, kind of like a muffled hum that is only there once I go over about 20kmh, then it doesn't really change in pitch or loudness as I speed up, slow down, go over bumps. Its pretty constant. Then it just stops when I slow down below 20kmh again. I'm pretty sure its not tyre noise because it doesn't change when I speed up... Bought the car from a private seller, so unfortunetely cant take it back to a dealer to get them to take a look. Any ideas before I go wasting cash at a mechanic just to tell me it's something normal? Thanks Sammy