Audi Q7 Humming sound from center of vehicle not RPM dependant
Hi all,
I've got an issue that I cant figure out and wanted to get your advice. I recently replaced the brake pads and rotors on my wife's 2017 Audi Q7 3.0. Aftwards there was some noise from the brakes which i believed was part of the bedding process which eventually went away. About two days later the car started to make a humming sound that sounds almost like when yours a kid and put a baseball card in the spokes of a bike to make it sound like a motorcycle. The hum gets higher piched based on speed but is not RPM dependent. It doesnt make the sound from reving the engine while parked only from moving and going above around 35 MPH.
My attempt to diagnose was jacking the car back up, taking the wheels off and making sure nothing was lose and hitting the rotors or wheels from the brake install. I couldnt find anything thay would have been hitting the wheels, rotors, or axels. Everything was tight and none of the lines or wires were unsecured. I also felt for front back play in the wheels in case it was the wheel bearing and didn't feel any play.
From what I can find on the internet most similar sounds seem to be from a bad wheel bearing but the sound is coming from the center of the engine bay. When you're in the driver seat it sounds like its coming from the right and in the passenger sest from the left. When I roll the windows down I can't hear it at all. I also noticed some vibration through the gas peddle but not through the brake pebal or the stearing wheel.
Any ideas what could be making the sound? I'm still thinking wheel bearings but I'm not sure.